EP3801812A1 - Contrôle de la rhéologie d'un résidu de minerai métallique - Google Patents
Contrôle de la rhéologie d'un résidu de minerai métalliqueInfo
- Publication number
- EP3801812A1 EP3801812A1 EP19737158.6A EP19737158A EP3801812A1 EP 3801812 A1 EP3801812 A1 EP 3801812A1 EP 19737158 A EP19737158 A EP 19737158A EP 3801812 A1 EP3801812 A1 EP 3801812A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polymer
- residue
- aqueous
- metal
- mpa
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/05—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media from solid polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1802—C2-(meth)acrylate, e.g. ethyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/41—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds using a solution of normally solid organic compounds, e.g. dissolved polymers, sugars, or the like
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
Definitions
- the invention relates to a method for preparing an aqueous mineral suspension from an aqueous metal ore residue into which a polymer (P) of molecular weight Mw measured by GPC ranging from 100,000 to 3 ⁇ 10 6 g / mol is introduced and prepared by radical polymerization of at least one anionic monomer (M).
- P polymer
- Mw molecular weight measured by GPC ranging from 100,000 to 3 ⁇ 10 6 g / mol
- the method according to the invention is implemented during a mining process for mining at least one mining deposit.
- These mining processes generally make it possible to obtain at least one metal to be valorized from a metallic ore.
- the metallic ore also includes a residue of this metallic ore.
- Mining processes are usually carried out using water as a treatment or transport medium for dry matter.
- the metal ore residue is therefore usually an aqueous residue of metal ore.
- ⁇ can also be a sludge of metal ore residue. It can also be a muddy residue of ore.
- the aqueous metal ore residue thus results from at least one step of separating the metal to be upgraded or a derivative of the metal to be valorized from a metal ore, in particular from a metal ore produced by mineral extraction.
- the fraction of the metal ore to be upgraded is a metal or several metals or a derivative of a metal or a derivative of several metals.
- an essential step consists in adding at least one polymer (P) in an aqueous metal ore residue.
- This step therefore concerns the treatment of a metal ore residue. It does not concern the treatment of metallic ore which is to be valorized.
- This step is therefore generally implemented in a mining process comprising different stages of treatment of the metallic ore and different stages of treatment of the metal ore residue.
- the mining processes comprise several stages of treatment of the metallic ore, several stages of treatment of the metal to be valorized or treatment of the metal derivative to be valorized as well as several stages of treatment of the metal ore residue.
- a mining process comprises one or more of the following steps:
- concentration of the metal ore residue for example by filtration, by sedimentation, by gravitation, by use of a thickener, by flocculation, partial separation of the aqueous residue of metallic ore and a portion of the water,
- Methods for the preparation of an aqueous mineral suspension from an aqueous metal ore residue are known, in particular such methods used in the treatment, transportation or storage of such a residue.
- EP 1976613 relates to the concentration of an aqueous suspension of solid particles by adding a flocculant organic polymer and an agent selected from the group consisting of radical agents, oxidizing agents, enzymes and radiation.
- WO 00-43317 discloses the use of a viscosity modifying compound in a sludge thickener during which this compound is introduced in a particular manner into a thickener.
- WO 2017-097799 discloses a method of treating an aqueous effluent from oil sands mining comprising the addition of a sulfonated dispersant and the addition of a flocculating agent.
- GB 1414964 relates to a deflocculating method of a particulate material, which comprises adding to a slurry of the particulate material a copolymer or a water-soluble derivative of a vinyl copolymer.
- the known suspensions In order to make them manipulable, the known suspensions generally have a reduced concentration of solids. In fact, the addition of water can make it possible to lower the viscosity or the yield point of these suspensions.
- the control of the viscosity of the aqueous mineral suspensions prepared from a mining derivative is important, in particular for their pumping, to facilitate their agitation or for their transport.
- Control of the viscosity of aqueous mineral suspensions prepared from a mining derivative is therefore essential, especially for their storage. Indeed, storage conditions for sludge or aqueous mineral suspensions prepared from a mining derivative can be influenced by many factors, both physical and chemical.
- the concentration, the rheological behavior and in particular the viscosity, the flow threshold, the sloping angle must be controllable.
- the storage in basins can be disturbed and these basins can present risks of uncontrolled flow. It is therefore necessary to be able to thicken aqueous residues of ore, especially at the outlet of a thickener, while controlling their rheology.
- These residues can then be placed in storage basins more efficiently and more safely, in particular by stacking successive layers of residue thus thickened.
- the stack of residue in successive layers with a suitable slope then allows the increase in the service life of storage basins generally limited in area.
- the compatibility with the various constituents of the aqueous mineral suspensions prepared from an aqueous metal ore residue is also an important property to look for, in particular the compatibility with a flocculating agent that can be used to treat the aqueous residue.
- metal ore including compatibility with a polyacrylamide or a polyacrylamide derivative.
- the method according to the invention makes it possible to provide a solution to all or part of the problems of the methods for preparing an aqueous mineral suspension from an aqueous metal ore residue of the state of the art.
- the invention provides a method for preparing an aqueous mineral suspension having a dry matter concentration greater than 40% by weight of the suspension and having at least one property chosen from:
- At least one radical generating compound selected from ammonium persulfate, an alkali metal persulfate and combinations thereof or combinations thereof with an ion selected from Fe 11 , Fe ni , Cu 1 , Cu 11 and mixtures thereof;
- the method according to the invention therefore makes it possible to control essential properties of the aqueous suspension prepared.
- This method makes it possible to control both the Brookfield viscosity and the flow threshold of the suspension prepared.
- the Brookfield viscosity is measured at 100 rpm and at 25 ° C, for example by means of a Brookfield DY3T rheometer.
- the Brookfield viscosity of the suspension prepared is greater than 2000 mPa.s.
- the method according to the invention makes it possible to prepare a suspension which has a viscosity greater than 2500 mPa.s, more preferably greater than 3000 mPa.s or greater than 4000 mPa.s.
- the viscosity of the suspension prepared is less than 10,000 mPa.s, more preferably less than 8000 mPa.s or less than 7000 mPa.s.
- the viscosity of the suspension prepared ranges from 1,800 mPa.s to 10,000, 8,000 or 7,000 mPa.s or from 2,000 mPa.s to 10,000, 8,000 or
- the method according to the invention makes it possible to control, in particular to increase, the threshold of flow of the aqueous metal ore residue with respect to the flow threshold of the aqueous metal ore residue containing no polymer ( P).
- the flow threshold which characterizes the flow resistance, is measured on a sample of an aqueous mineral suspension, in particular an aqueous metal ore residue.
- the flow threshold is the stress that must be applied to a suspension in order to cause its flow. If the stress is insufficient, the suspension elastically deforms while if the stress is sufficient, the suspension can flow in the manner of a liquid.
- the flow threshold expressed in Pascal (Pa) is measured at a temperature of 25 ° C. by means of a Brookfield DV3T rheometer with imposed constraint, equipped with a movable fin adapted. Without destroying the underlying structure, the finned mobile is immersed in the material to the first immersion mark.
- the measurement is carried out without pre-shearing at the speed of 0.5 rpm. This relatively low speed is preferred in order to minimize the inertial effects of the finned mobile.
- the variation of the torsion torque measured by the apparatus to maintain a rotational speed of 0.5 rpm is monitored as a function of time.
- the value of the flow limit or flow threshold of the aqueous residue is indicated by the apparatus when this variation becomes zero.
- the flow threshold is measured at a temperature of 25 ° C by means of an imposed stress rheometer equipped with a finned wheel for a particular torsion torque.
- the flow threshold of the suspension prepared is greater than 40 Pa.
- the method according to the invention makes it possible to prepare a suspension which has a yield point greater than 80 Pa or greater than 100 Pa, preferably greater than 150 Pa or greater than 200 Pa or even greater than 300 Pa.
- the method according to the invention makes it possible to prepare a suspension which has a yield point of less than 700 Pa or less than 500 Pa, preferably less than 450 Pa or less than 400 Pa.
- the method according to the invention makes it possible to prepare a suspension which has a yield point greater than 80 Pa or greater than 100 Pa, preferably greater than 150 Pa or greater than 200 Pa or even greater than 300 Pa. and less than 700 Pa or less than 500 Pa, preferably less than 450 Pa or less than 400 Pa.
- the method according to the invention makes it possible to prepare a suspension which has a yield point ranging from 40 Pa to 700, 500, 450 or 400 Pa or from 80 Pa to 700, 500, 450 or 400 Pa or else from 100 Pa at 700, 500, 450 or 400 Pa or 150 Pa at 700, 500, 450 or 400 Pa or alternatively 200 Pa at 700, 500, 450 or 400 Pa or 300 Pa at 700, 500, 450 or 400 Pa.
- the method according to the invention makes it possible to control the rheology of the suspension prepared for a solids concentration greater than 40% by weight of the suspension.
- the method according to the invention makes it possible to prepare a suspension having a solids concentration of greater than 50% by weight or 55% by weight.
- the method according to the invention makes it possible to prepare a suspension having a solids concentration greater than 60% by weight or greater than 65% by weight. More preferably, the method according to the invention makes it possible to prepare a suspension having a solids concentration greater than 70% by weight or greater than 75% by weight.
- the amount of polymer (P) used can vary quite widely.
- the suspension prepared comprises from 0.01 to 2% by weight or from 0.01 to 1.8% or else from 0.01 to 1.5% of polymer (P) (dry on dry relative to the ore residue). More preferably, the suspension prepared comprises from 0.01 to 1.2% or from 0.01 to 1% or from 0.02 to 0.8%, or from 0.03 to 0.5% or else from 0, 04 to 0.25% or 0.04 to 0.15% by weight of polymer (P) (dry on dry relative to the ore residue).
- the method according to the invention can implement one or more polymers (P).
- the suspension prepared then comprises one, two or three different polymers (P).
- the method according to the invention may also comprise the additional addition of at least one compound chosen from a thickening polymer derivative of natural origin or synthetic, mineral or organic (alginates, guar gums, xanthan gums, modified cellulose derivatives , unmodified cellulose derivatives, starches, modified starches), of mineral origin (bentonite, laponite, clays), an unmodified polysaccharide and a polysaccharide.
- the method according to the invention comprises the addition to an aqueous residue of metal ore of at least one polymer (P).
- the metal ore is not an aluminum ore.
- the metal ore is selected from lithium ore, strontium, lanthanides, actinides, uranium, rare earths, titanium, zirconium, vanadium, niobium, chromium, molybdenum, tungsten, manganese, iron, cobalt , rhodium, iridium, nickel, palladium, platinum, copper, silver, gold, zinc, cadmium, tin, lead.
- the Metallic ore is selected from uranium, molybdenum, manganese, iron, cobalt, nickel, copper, silver, gold ore. More preferably, it is a copper ore. It can also be a derivative of several metals to be valued including copper, zinc and cobalt.
- the metallic ore comprises at least one metal or at least one metal derivative for recovery obtained by separating all or part of the residue from the metal ore.
- the metallic ore comprises a metal oxide, a metal sulphide or a metal carbonate.
- the metal ore residue may comprise some residual amount of metal.
- the metal ore residue may comprise a residual amount of metal less than 2,000 g per tonne (dry / dry) based on the amount of metal ore residue.
- This amount of metal within the metal ore residue can generally range from 10 to 2,000 g per tonne (dry / dry) or from 10 to 1,000 g per tonne (dry / dry), based on the amount of residue of metal ore.
- the polymer (P) may be added during one or more steps of the mining process, in particular during one or more stages of treatment of the metal ore residue, by example of pumping, flocculation, concentration, transport or storage of the metal ore residue, in particular the aqueous metal ore residue.
- the concentration of the aqueous metal ore residue is substantially increased.
- the concentration of the aqueous metal ore residue is increased by 10 to 40% by weight or 20 to 40% by weight or 10 to 50% by weight or 20 to 50% by weight.
- the concentration of the aqueous metal ore residue is increased from 10 to 70% by weight or from 20 to 70% by weight or alternatively from 10 to 60% by weight or else from 20 to 60% by weight.
- a pump chosen from a centrifugal pump, a pump peristaltic pump, a positive displacement pump, a water pump, a compressed air pump, a diaphragm pump, a rotary pump or
- aqueous metal ore residue in particular by means of a centrifugal pump or a positive displacement pump
- a step of pumping the aqueous metal ore residue in particular by means of a centrifugal pump or a positive displacement pump
- a step of concentrating the aqueous metal ore residue for example by means of at least one device selected from a thickener, a high density thickener, or by densimetric concentration or by gravimetric concentration; or
- aqueous metal ore residue before a step of transporting the aqueous metal ore residue, in particular transport by means of an open pipe, a closed pipe or a mineral pipe;
- a pump selected from a centrifugal pump, a peristaltic pump, a positive displacement pump; or
- aqueous metal ore residue after a step of pumping the aqueous metal ore residue, in particular by means of a centrifugal pump, a peristaltic pump or a positive displacement pump; or
- aqueous metal ore residue for example by means of at least one device selected from a thickener, a high density thickener, or by densimetric concentration or by gravimetric concentration; or
- the polymer (P) used according to the invention has a molecular weight Mw measured by GPC ranging from 200,000 g / mol to 2.5 ⁇ 10 6 g / mol, more preferably ranging from 250,000 g / mol to 2, 2.10 6 g / mol or 400 000 g / mol at 2.2.10 6 g / mol.
- the polymer (P) used according to the invention is therefore not a flocculation agent.
- the molecular weight Mw is determined by Steric Exclusion Chromatography (CES) or in English “Gel Permeation Chromatography” (GPC).
- CES Steric Exclusion Chromatography
- GPC Gel Permeation Chromatography
- This technique uses a Waters liquid chromatography apparatus with a Waters refractometric concentration detector.
- This liquid chromatography apparatus is provided with a steric exclusion column in order to separate the different molecular weights of the copolymers studied:
- the analytical products used are tetrahydrofuran for HPLC and a set of standards of poly (methyl methacrylate) supplied by Agilent (Polymer Lab), EasiVial PMMA (4 mL), PL2020-0200 part number, molecular weight range: 500 to
- the analysis parameters are:
- the method according to the invention implements at least one particular polymer (P), in particular a polymer (P1) or a polymer (P2), prepared by a radical polymerization reaction at a temperature ranging from 50 to 98 ° C., preferably from 50 to 95 ° C or from 50 to 85 ° C.
- P1 polymer
- P2 polymer
- a higher temperature, especially greater than 100 ° C, can be implemented by adjusting the pressure of the reaction medium to prevent evaporation.
- the polymer (P) is prepared by at least one radical emulsion polymerization reaction or else at least one inverse emulsion radical polymerization reaction.
- the radical polymerization reaction one or more surface-active compounds may be used, in particular one or more nonionic surface-active compounds.
- the polymer (P1) is prepared in direct emulsion from:
- the polymer (P1) is prepared in water, alone or as a mixture with an organic solvent. More preferably according to the invention, the polymer (P1) is prepared in water alone.
- the polymer (P2) is prepared in inverse emulsion from:
- the polymer (P2) is prepared in an organic solvent, preferably in a hydrocarbon solvent, in particular a hydrocarbon-based petroleum fraction.
- the polymer (P2) is totally or partially neutralized, in particular at the end of the polymerization reaction.
- the polymer (P2) according to the invention may be neutralized, in particular during the polymerization reaction or at the end of the polymerization reaction.
- the polymer according to the invention may be totally or partially neutralized.
- the neutralization of the polymer is carried out by neutralizing or salifying all or part of the carboxylic acid functions present within the polymer.
- the neutralization is carried out by means of a base, for example by means of an alkali metal derivative or an alkaline earth metal derivative.
- the preferred bases are chosen from NaOH, KOH, NH 4 OH, monoisopropylamine, triethanolamine, triisopropylamine, 2-amino-2-methyl-1-propanol (AMP), triethylamine, diethylamine and monoethylamine.
- the neutralization is carried out using NaOH, KOH, NH 4 OH, alone or in combination.
- the polymerization reaction uses at least one anionic monomer (a) which comprises at least one polymerizable olefinic unsaturation and at least one carboxylic acid function or a salt thereof.
- the anionic monomer (a) comprising at least one polymerizable olefinic unsaturation, comprises one or two carboxylic acid functions, in particular a single carboxylic acid function. More preferentially, it is chosen from acrylic acid, methacrylic acid, an acrylic acid salt, a methacrylic acid salt and their mixtures, more preferably acrylic acid.
- the preferred monomer (a) is methacrylic acid.
- the preferred monomer (a) is acrylic acid.
- the preparation reaction of the polymer (P) may also employ one or more other monomers.
- the polymerization reaction then uses at least one other monomer chosen from:
- n and n identical or different, independently represent 0 or an integer or decimal number less than 150, m or n is not equal to 0,
- OP represents independently a group chosen from CH (CH 3 ) CH 2 0 and CH 2 CH (CH 3 ) O,
- R 1 represents a group comprising at least one polymerizable olefinic unsaturation, preferably a group selected from acrylate, methacrylate, acrylurethane, methacrylurethane, vinyl, allyl, methallyl and isoprenyl, more preferably a methacrylate group,
- R 2 represents a linear, branched or cyclic, saturated, unsaturated or aromatic hydrocarbon group comprising from 6 to 40 carbon atoms, preferably a linear or branched C 6 -C 40 -alkyl group, preferably a C 8 group; C 3 o-alkyl, linear or branched, a C 6 -C 4 o-aryl group, preferably a C 8 -C 3 o-aryl group, for example a tristyrylphenyl group; or
- polyalkyleneglycol acrylate preferably polyethylene glycol acrylate or polyethylenepolypropyleneglycol acrylate
- polyalkyleneglycol methacrylate preferably polyethylene glycol methacrylate or polyethylenepolypropyleneglycol methacrylate
- allylpolyalkyleneglycol preferably allylpolyethyleneglycol or allylpolyethylenepolypropyleneglycol
- methallylpolyalkyleneglycol preferably methallylpolyethyleneglycol or methallylpolyethylenepolypropyleneglycol, 3-methyl-3-buten-1-ylpolyalkylene glycol, preferably 3-methyl-3-buten-1-ylpolyethylene glycol or 3-methyl-3-buten-1-ylpolyethylenepolypropyleneglycol; or
- the polymer (P) used according to the invention is a non-sulfonated polymer.
- the preparation method according to the invention makes it possible to prepare a suspension of aqueous metal ore residue comprising at least one polymer (P) which has particularly advantageous properties, especially particularly advantageous rheological properties.
- the invention also provides an aqueous mineral suspension whose dry matter concentration is greater than 40% by weight of the suspension and having at least one property chosen from:
- polymer (P) comprising an aqueous metal ore residue and at least one polymer (P) of molecular weight Mw measured by GPC ranging from 100,000 to 3 ⁇ 10 6 g / mol and prepared by at least one radical polymerization reaction, at a temperature above 50 ° C. C, and chosen from: a polymer (P1) prepared in direct emulsion from: (a) at least one anionic monomer comprising at least one polymerizable olefinic unsaturation and at least one carboxylic acid function;
- At least one radical generating compound selected from ammonium persulfate, an alkali metal persulfate and combinations thereof or combinations thereof with an ion selected from Fe 11 , Fe ffl , Cu 1 , Cu 11 and mixtures thereof;
- At least one radical generating compound selected from ammonium persulfate, an alkali metal persulfate and combinations thereof or combinations thereof with an ion selected from Fe 11 , Fe m , Cu 1 , Cu 11 and mixtures thereof.
- Polymers used during the method according to the invention are prepared.
- the polymer (P1A) is prepared by introducing into a one-liter glass reactor equipped with a mechanical stirrer and an oil bath-type heating, 420 g of deionized water and 2.15 g of dodecyl. sodium sulfate.
- a pre-emulsion comprising: 205 g of deionized water,
- the reactor is heated to 85 ° C. and the initiator 1 is injected. Then, the preemulsion is injected into the reactor maintained at 85 ° C. for 2.5 hours. Initiator 2 is injected in parallel into the reactor for the duration of the polymerization and concomitantly with the addition of the pre-emulsion.
- the medium is again heated for 60 min at 80 ° C.
- a dispersion of polymer (P1A) of molecular weight Mw measured by GPC of 2.10 6 g / mol to 30% by weight of solids and pH 2.8 is obtained.
- the polymer (PIB) is prepared by introducing into a one-liter glass reactor equipped with a mechanical stirrer and an oil-bath heating, 420 g of deionized water and 4.1 g of dodecyl. sodium sulfate.
- a pre-emulsion comprising:
- the reactor is heated to 75 ° C. and the initiator 1 and the initiator 2 are injected. Then, the preemulsion is injected into the reactor maintained at 75 ° C. for 2 hours.
- the medium is again heated for 60 min at 80 ° C.
- a dispersion of polymer (P1B) of molecular weight Mw measured by GPC of 500,000 g / mol to 30% by weight of solids and pH 3.0 is obtained.
- the raw material used for this series of tests is an aqueous metal ore residue from a Chilean copper mine in the north of the country.
- ⁇ is a waste from the separation of the rock extracted from the ore mine including the metal to be valued.
- This aqueous residue of copper ore is in the form of a suspension in water.
- the samples used for these tests come from the outlet of a conventional thickener used to concentrate the aqueous residue of metal ore before it is deposited in a storage tank.
- the first sample is taken just after a peristaltic pump, the second after a centrifugal pump.
- the particle size distribution shows the presence of several populations of particles having different sizes:
- Thickness tests are then performed on the aqueous residue samples from points (A) and (B).
- a sample of suspension of aqueous copper ore residue is transferred to a 500 mL beaker and then mechanically stirred with a Raynerie mixer. The agitation varies between 800 and 1000 rev / min.
- polymers (P1A) or (P1B) according to the invention makes it possible to substantially increase these viscosities as well as to control the flow threshold of these suspensions.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Polymerisation Methods In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1854993A FR3082196B1 (fr) | 2018-06-08 | 2018-06-08 | Controle de la rheologie d'un residu de minerai metallique |
| PCT/FR2019/000093 WO2019234316A1 (fr) | 2018-06-08 | 2019-06-05 | Contrôle de la rhéologie d'un résidu de minerai métallique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3801812A1 true EP3801812A1 (fr) | 2021-04-14 |
Family
ID=65031240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19737158.6A Pending EP3801812A1 (fr) | 2018-06-08 | 2019-06-05 | Contrôle de la rhéologie d'un résidu de minerai métallique |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US12173126B2 (fr) |
| EP (1) | EP3801812A1 (fr) |
| CN (1) | CN112261977B (fr) |
| AU (1) | AU2019282375B2 (fr) |
| CA (1) | CA3102188A1 (fr) |
| CL (1) | CL2020003160A1 (fr) |
| CO (1) | CO2020014710A2 (fr) |
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| CN111153485A (zh) * | 2019-12-20 | 2020-05-15 | 中国科学院南京土壤研究所 | 一种高效活化过硫酸盐的组合物及其应用 |
| CN121892044A (zh) * | 2026-03-04 | 2026-04-21 | 柏睿(广州)新型材料科技有限公司 | 一种稳定悬浮的膨润土增稠凝胶及其制备方法 |
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| WO2012125918A1 (fr) * | 2011-03-17 | 2012-09-20 | Hercules Inc. | Procédé pour améliorer le débit d'une dispersion aqueuse |
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| GB1414964A (en) * | 1971-10-19 | 1975-11-19 | English Clays Lovering Pochin | Copolymers and their use in the treatment of materials |
| DE3935137A1 (de) * | 1989-10-21 | 1991-04-25 | Hoechst Ag | Urethangruppen enthaltende copolymerisate auf der basis von ethylenisch ungesaettigten monomeren, verfahren zu ihrer herstellung und ihre verwendung |
| US5516852A (en) * | 1993-11-12 | 1996-05-14 | W. R. Grace & Co.-Conn. | Method of producing water-soluble cationic copolymers |
| US6231768B1 (en) | 1999-01-19 | 2001-05-15 | Nalco Chemical Company | Rheology modification of settled solids in mineral processing |
| JP3712946B2 (ja) * | 2001-02-28 | 2005-11-02 | ハイモ株式会社 | 両性水溶性高分子分散液 |
| DE102004013750A1 (de) * | 2004-03-18 | 2005-11-03 | Stockhausen Gmbh | Anionische Wasser-in-Wasser-Polymerdispersionen, Verfahren zu deren Herstellung sowie deren Verwendung |
| GB0601000D0 (en) * | 2006-01-18 | 2006-03-01 | Ciba Sc Holding Ag | Concentration of suspensions |
| WO2015074739A1 (fr) * | 2013-11-25 | 2015-05-28 | Merck Patent Gmbh | Polymères contenant des liquides ioniques polymérisés et utilisation desdits polymères dans des membranes |
| ES2609402T3 (es) * | 2014-05-30 | 2017-04-20 | S.P.C.M. Sa | Método para el tratamiento de suspensiones de partículas sólidas en agua mediante el uso de polímeros en peine |
| FR3044655B1 (fr) | 2015-12-07 | 2021-06-11 | Snf Sas | Procede de traitement d'effluent aqueux |
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- 2019-06-05 EP EP19737158.6A patent/EP3801812A1/fr active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012125918A1 (fr) * | 2011-03-17 | 2012-09-20 | Hercules Inc. | Procédé pour améliorer le débit d'une dispersion aqueuse |
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|---|---|
| CA3102188A1 (fr) | 2019-12-12 |
| PE20210080A1 (es) | 2021-01-11 |
| AU2019282375A1 (en) | 2020-12-17 |
| BR112020024929A2 (pt) | 2021-03-09 |
| FR3082196A1 (fr) | 2019-12-13 |
| AU2019282375B2 (en) | 2024-09-26 |
| US20210171722A1 (en) | 2021-06-10 |
| CN112261977B (zh) | 2022-09-23 |
| US12173126B2 (en) | 2024-12-24 |
| PE20252689A1 (es) | 2025-11-26 |
| ZA202007712B (en) | 2022-03-30 |
| FR3082196B1 (fr) | 2021-04-23 |
| WO2019234316A1 (fr) | 2019-12-12 |
| CL2020003160A1 (es) | 2021-04-23 |
| MA52770A (fr) | 2021-04-14 |
| CO2020014710A2 (es) | 2020-12-10 |
| MX2020012119A (es) | 2021-01-20 |
| CN112261977A (zh) | 2021-01-22 |
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