TW200900511A - Recycling of nickel-containing waste - Google Patents

Abstract

The invention relates to a method for directly recovering nickel sulfate from nickel-containing disposed liquid using crystal precipitation method. The crystal precipitation method includes adding concentrated sulfuric acid into the nickel-containing disposed liquid. It not only increases the concentration of sulfate to oxidize organic components in the disposed liquid utilizing the strong oxidization ability of sulfuric acid, but also adds nickel sulfate into the disposed liquid to increase the pH value so as to increase the concentration of nickel ions to generate crystal of nickel sulfate.

Description

200900511 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a method for adding concentrated sulfuric acid to a nickel waste liquid and adding nickel carbonate to produce crystals of nickel sulfate. [Prior Art] Anaging of the electric ore process Most of them use chemical coagulation method to add a coagulant. The neutralizer and the metal ions form a metal hydroxide gel to remove metal ions in the wastewater. The sinking substance is dehydrated by lining or centrifugation to produce high water content. Rate (>8〇%) Sludge/3⁄4• Mud is concentrated and purified by heat treatment, g-leaching, and electrolysis. The following are divided into three categories: the waste liquid, the waste water and the sludge treatment. The following are the following: 1. Electroplating waste treatment 1. Announcement No.: 558550 'The name of the sulfuric acid patent. The treatment method of the copper containing the towel is summarized as follows: for the PCB to observe the Wei _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Control the dosing amount of the reactants, filter to remove or add a coagulant to remove copper sulfide to produce copper sulfide, and then 'improve the copper content of the sludge to make it favorable for recovery. 2. Public number: 200412330

The effect of 200900511. 3. Announcement No.: 312707 Patent Name: Process for recovering solder metal from solder plating waste liquid and sediment. Abstract: Add the miscellaneous solution (sodium hydroxide solution, sodium carbonate solution, potassium hydroxide solution) to the ship containing the lyophilized component. , ammonia, etc., so that its yang is controlled in (4), to neutralize the solder metal of the sinking hall, after the sediment is washed and washed, the water is removed, and then the high temperature _~ Fu, 2~10 hours, to convert the sinking material into The oxide is finally added to the raw material containing carbon, and is reduced to a solder metal at a high temperature of ~95 〇t, i for 5 to 3 hours to be recovered. 4. Announcement No.: 473559 Patent Name: Method and device for recycling and recycling etched waste liquid Abstract: For the gasification copper test produced by side shot, adding hydrogen chloride to copper chloride waste liquid reacts to produce copper hydroxide, so that Copper hydroxide is thermally decomposed to produce oxidized fines, and then de-phased to obtain copper, and then sulfuric acid is recognized, and a copper-containing electrolyte is formed after dissociation. The copper ion-containing electrolyte is supplied to the electric ore tank to perform electric ore. 5. Public No.: 200418734 Patent Name: Metal Waste Liquid Treatment Method Abstract: Adding catalytic metal particles by redox method, so that the reducing agent can adsorb on the surface of the ruthenium metal. Using the principle of non-electrical ore, the metal in the waste liquid The ion is reduced to metal evil, and the micro- or nano-particles are reacted greatly. The strong activity between the surface area and the reducing agent 200900511 forms an active center for sustainable reaction, which promotes the reduction of ions into particles, which are then recycled after being precipitated. 6. Announcement No.: 416995 Patent name: Summary of the reuse method of ferric chloride-based waste liquid. Before the iron powder is introduced into the mixing tank, the copper, recorded metal and other metals with less iron ionization tendency are precipitated and removed. After electrolysis treatment, part or almost all of the second iron ion is reduced to a solvent of Wei iron water in the county of Linyi. 7. § The number of the book: 1227217 Patent name: Shun practice method summary: Electrolytic reduction at low temperature, the copper liquid is reduced to metal steel by the waste liquid, and the electrolytic oxidation is determined under the high dish, the waste liquid is in the middle Tin and yase ions are reduced to metal oxides. Second, electroplating sludge treatment I Announcement No.: 460585 Patent name: Metallic sludge recycling and reuse treatment method Abstract: For the treatment of metal sludge recovery and reuse, high concentration copper ion wastewater is formed by chemical coagulation The concentrated copper sludge is sent to a pyrolysis furnace after dehydration treatment, and the copper hydroxide in the sludge is cracked into copper oxide powder, and then sent to a high-temperature furnace, which is converted into a crude copper ingot, thereby achieving the recovery effect. . 2. Public No.: 200604110 Patent Name: Method for recovering copper oxide from copper sludge (2) Abstract··The copper-containing sludge is leached with sulfuric acid to obtain a metal solution containing copper deficiency to unload 200900511 Ions, which produce potassium aluminum bismuth and a by-product of the copper-containing solution, and the copper-containing solution is oxidized or ammonia-impregnated to obtain copper oxide recovery. 3. Certificate No.: 1277609 Patent Name: Separation method of harmful metal sludge Abstract: The harmful sludge is dehydrated and dried at a low temperature to reduce the water content to less than 1%, and then the purity is recovered by means of pulverization, vibration and electrolysis. Very high metal ingots. 4. Announcement No.: 304209 Patent Name: Electroplating sludge recovery chromium salt Abstract: 98% concentrated sulfuric acid is directly added to the chromium sludge to dissolve the trivalent chromium in the sludge, plus 3〇% hydrogen peroxide or 0.1M permanganic acid. Potassium converts trivalent chromium to hexavalent chromium. 3. Electrolytic wastewater treatment 1. Public No.: 200503966 Patent name: Zero sludge wastewater treatment method and equipment Abstract: Zero sludge wastewater treatment method, adjusting the raw water concentration of copper-containing wastewater, and then adding coagulant to improve wastewater The concentration of metal ions is adjusted to an alkaline environment to facilitate the formation of metal hydroxides, and then a polymer aggregating agent is added to accelerate the sinking of the metal hydroxide to obtain a sludge containing a high copper ion concentration, which is 1N to 2N. The sulfuric acid is immersed to obtain a copper-containing metal extract, and the copper-containing solution is subjected to freeze crystallization to produce copper sulfate crystals, which is a valuable heavy metal material with high economic value. The residue in the process can be recycled as a coagulant for the purpose of no sludge generation. 2. Public No.: 200503964 200900511 Patent Name: Ferric Oxygen Magnets for Electroplating Wastewater Treatment Abstract: The electric ore wastewater is first added to the divalent iron salt, and the key parameters of the control are greater than 3, and the adjusted positive value is greater than 8'. The sub-aggregating agent 'increases the concentration of heavy metal ions in the neutralization chamber, and then uses ferrite magnetization to form ferrite magnet spinel crystals. 3. Certificate number: 1239320 Patent name: Summary of method for recycling cyanide electroplating wastewater. The electroplating wastewater is completely adsorbed to the resin by cyanide-containing heavy metal material through the resin. When the resin is saturated, the regenerant is introduced to make cyanide. The state in which the anion is coated with a heavy metal, so that the cyanide heavy metal substance can be removed from the resin, and the heavy metal is recovered by electrolysis. 4. Certificate number: 1252840 Patent name: Method for treating acid and metal waste water Abstract: Add ammonium solution, ammonia gas or atmosphere to acid and metal wastewater containing acid leaching equipment to provide compound to the wastewater and combine free acid In the wastewater, the wastewater is divided into high-metal waste liquid and low-metal waste liquid by the reverse-reflection film, and the high-metal waste liquid is treated by evaporation. 200900511 [Summary of the Invention] Sulfuric acid is added to the nickel-plated waste liquid to oxidize the organic components of the softener and the brightener in the nickel-plated waste liquid, and the boric acid portion in the waste liquid is analyzed by the principle of competitive balance to produce a crystallization crystal. , separating it from the ^ and separating the supernatant from the fabric. Nickel carbonate is added to the supernatant liquid after centrifugation to increase the pH, and the concentration of nickel ions is increased to produce crystals of sulfuric acid. [Embodiment] Directly add 50_95% of Han sulphuric acid to the nickel waste liquid to control the pH < 〇, so that the luster record in the mine waste liquid oxidizes the organic component, and at the same time, the principle of balance and balance will be the micro part of the waste liquid. Reading ώ produces a boron-crystal, separating it from the liquid, and separating the liquid from the precipitate. Also added to the supernatant after centrifugation to increase the pH to 3-4, while increasing the recording of ions, the degree 'to produce sulfur _ crystal, can also increase the sulfur _ crystallization rate of thief equipment, the simple process is as follows: [Simple description of the map]

Boric acid precipitation [Main component symbol description] 10

Claims (1)

200900511 X. Patent application scope: 1. A method for directly recovering nickel sulfate from nickel-containing waste by crystallization, and adding concentrated sulfuric acid to the nickel-plated waste liquid to produce crystals of nickel sulfate. The steps are as follows: . a. Concentrated sulfuric acid: Add 5 〇 95% concentrated sulfuric acid to make pH < b. Centrifugation: Centrifugation of boric acid crystals using a centrifugal device. c. For drying. Use drying equipment to increase the rate of nickel sulfate production. 2. For the procedure described in the scope of the patent application, the nickel-containing waste contains: an aged plating solution, a cyanide-free nickel-containing waste liquid. χ μ, Process 3 - A method of directly recovering sulfuric acid directly from a nickel-containing waste by a crystal precipitation method / a method of adding concentrated sulfuric acid to a nickel-containing waste to produce a nickel sulfate crystal, the procedure of which is as follows. Department a. Concentrated sulfuric acid: Add 2〇-95% concentrated sulfuric acid to the nickel-containing waste until Qiu> · b. Centrifugation: Centrifugal separation of quartz sand or other carriers using a centrifugal device. c. Crystallization: standing or drying 'to produce nickel sulfate crystals. 4. The procedure of claim i, wherein the nickel-containing waste comprises: nickel carbonate crystals produced when fluidized bed crystallization is used. 5. A method of directly recovering a sulphuric acid bromine directly from a nickel-containing waste using a crystallization method. A method of adding concentrated sulfuric acid and nickel carbonate to nickel plating waste liquid to produce crystals of nickel sulfate, the steps of which are as follows: a. Concentrated sulfuric acid: 50-95% concentrated sulfuric acid is added to make pH < b. Centrifugation: Centrifugation of boric acid crystals using a centrifugal device. c. Nickel carbonate addition: The addition of nickel carbonate increases the pH to 3-4, resulting in the formation of nickel sulfate crystals. Soil drying: use drying equipment to increase the rate of nickel sulfate production. 6. For the procedure described in the scope of patent application, in which the nickel-containing waste contains: the aging process of the electric It liquid, the fragrance-free liquid-containing liquid, and the nickel-containing wastewater to make the corpuscle bed crystallization method. The resulting nickel carbonate crystallizes.