CN101972709B - Flotation method of carbon-bearing lead-zinc ore and its carbon removal inhibitor - Google Patents

Abstract

The invention discloses a carbon removal inhibitor used for floatation of carbon containing lead zinc ore. The inhibitor comprises the following components by parts by weight: 25-100 parts of acetylene ethylene butyl ether, 25-100 parts of ferri-chrome ligin and 1000-5000 parts of lime. The invention also discloses a flotation method applying the inhibitor. The flotation method includes ore grinding, lead flotation and zinc flotation; wherein zinc flotation and lead flotation respectively include primary roughing, triple cleaning and triple scavenging, and finally lead-zinc ore concentrate is obtained. Compared with the prior art, the new inhibitor of the invention and flotation thereof have high selective efficiency, effective separation of carbon, lead and zinc can be realized, lead-zinc ore concentrate grade and metal recovery rate are improved, and mineral separation cost is low, technological flow is simple and reliable, and operation is easy.

Description

Flotation method of carbon-bearing lead-zinc ore and its carbon removal inhibitor

technical field

The invention relates to the field of mineral flotation, in particular to a flotation method of carbon-containing lead-zinc ore and a carbon removal inhibitor.

Background technique

With the massive development and utilization of mine resources, there are fewer and fewer lead-zinc sulfide mineral resources that are easy to select, and the lead-zinc mineral resources are gradually developing in the direction of poor, fine, and miscellaneous. How to find an efficient inhibitor that can effectively remove harmful impurities and improve the lead-zinc The enrichment index and the recovery rate of lead and zinc metals become the key to the effective development and utilization of this kind of lead and zinc resources.

Most of the carbon in carbon-containing lead-zinc mines in my country is in the aphanitic state, and it is difficult to remove aphanitic carbon through flotation, and it often competes with useful minerals for flotation reagents, which greatly increases the cost of flotation reagents. Conditions deteriorated dramatically. At present, the flotation of carbon-containing lead-zinc ores mainly adopts kerosene priority floatation or lignin-based carbon-inhibiting flotation process for lead-zinc. The carbon removal effect is often unsatisfactory, and the flotation process is long. Poor flotation indicators: the concentrate grade cannot meet the smelting requirements, the metal recovery rate is low, and it is difficult for enterprises to make profits from investment. For example, although the lead-zinc ore reserves in the Urad area of Inner Mongolia are large, the lead-zinc grade is low (only about 4% lead + zinc), and the carbon content is high (often reaching more than 10%), and the carbon is aphanitic, and the carbon can be buoyant. It is difficult to achieve the effective separation of carbon, lead and zinc by traditional beneficiation techniques and inhibitors, which seriously restricts the development and utilization of high-carbon lead-zinc ores in this area.

Contents of the invention

The technical problem to be solved in the present invention is to provide a carbon-containing lead-zinc ore flotation with good carbon-removing effect and to use a carbon-removing inhibitor, and also provide a flotation method using the inhibitor, so as to realize the effective removal of carbon, lead, and zinc. Separation and improvement of lead-zinc concentrate grade and metal recovery rate.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: carbon-containing lead-zinc ore floatation selects carbon removal inhibitors, and the inhibitors contain the following components in parts by weight: 25-100 parts of acetylene ethylene butyl ether, 25-100 parts Part iron chromium lignin and 1000-5000 parts lime.

Use the above-mentioned carbon-containing lead-zinc ore flotation to select the flotation method for removing carbon inhibitor, the flotation method comprises the steps:

<1> Grinding: Grinding carbon-containing lead-zinc ore until the particle size is less than 200 mesh accounts for 70-90%;

<2> Flotation of lead: lead concentrate is obtained after one lead roughing, three lead refining and three lead sweeping; Chromium lignin and 1000-5000 grams of lime, stir for 1-10 minutes, adjust the pH of the pulp to 10-11.5, then add 20-80 g/ton of 25# black medicine, mix for 1-5 minutes, add 10 ~30g/ton of 2# flotation oil; in the third medium of lead selection, add 10~40g/ton of acetylene ethylene butyl ether and iron chromium lignin and 400~2000g/ton of lime; three times of lead selection, Add 5-30 g/ton of 25# black medicine respectively;

<3> Zinc flotation: Zinc concentrate is obtained through one zinc roughing, three zinc beneficiation and three zinc scavenging; for zinc roughing, lime 500-1500 g/t and copper sulfate 500 g/t are added to the lead scavenging tailings. ～1500g/ton, mixing for 1～10 minutes, then adding 40～100 grams/ton of butyl xanthate, 10～50 grams/ton of 2# oil, mixing for 1～5 minutes; Lime 300-800 g/ton; three zinc sweeps, each adding 5-50 g/ton butyl xanthate.

The carbon-containing lead-zinc ore flotation of the present invention adopts acetylene ethylene butyl ether (MIG-4E)+iron chromium lignin+lime (CaO) as a combined inhibitor for the flotation of carbon-containing lead-zinc ore, which does not require pre-flotation decarbonization and can be directly Contains char and pyrite in the flotation tailings. Using the flotation method of carbon-containing lead-zinc ore flotation and selecting carbon-removing inhibitors, the complex low-grade lead-zinc ores with a carbon content of 10% and a large difference in the floatability of the carbon can be effectively flotation-separated to produce lead Zinc Smelting provides high-quality lead and zinc concentrates. Compared with the prior art, the new depressant of the present invention and its flotation method have high sorting efficiency, lead-zinc concentrate grade (increased by about 20%, 10%) and lead-zinc recovery rate (increased by about 20%, 20%) ) have been greatly improved, and the cost of beneficiation is low, the process flow is simple and reliable, and the operation is easy.

Description of drawings

Fig. 1 is the process flow chart of carbon-containing lead-zinc ore flotation method of the present invention.

In the figure: MIG-4E is acetylene butyl ether, CaO is lime, 2# oil is 2# flotation oil, butyl xanthate is butyl sodium xanthate, and CuSO ₄ is copper sulfate.

Detailed ways

Fig. 1 has shown the process flow sheet of carbon-containing lead-zinc ore flotation method of the present invention, below in conjunction with embodiment technical content of the present invention is done in further detail.

Example 1

<1> Grinding: Grinding carbon-containing lead-zinc ore until the particle size is less than 200 mesh accounts for 70%;

<2> Lead flotation: After one lead roughing, three lead refining and three lead sweeping to obtain lead concentrate; for lead roughing, add 25 grams of acetylene ethylene butyl ether, 50 grams of iron chromium lignin and per ton of raw ore 1000 grams of lime, stir for 5 minutes, adjust the pH of the slurry to 10.0, then add 20 g/ton of 25# black medicine, mix for 3 minutes, add 30 g/ton of 2# flotation oil; Add 10 g/ton of acetylene ethylene butyl ether and iron chromium lignin and 400 g/ton of lime; three times lead sweeping, add 10, 5, 5 g/ton of 25# black medicine respectively;

<3> Zinc flotation: Zinc concentrate is obtained through one zinc roughing, three zinc beneficiation and three zinc scavenging; for zinc roughing, 500 g/ton of lime and 500 g/t of copper sulfate are added to the tailings of lead scavenging Tons, pulping for 1 minute, then adding 40 g/ton of butyl xanthate, 10 g/ton of 2# oil, and pulping for 5 minutes; zinc selection No. 3, adding lime 300 g/ton; three zinc sweeps, each Add 20, 10, 5 g/t of butyl xanthate.

Example 2

<1> Grinding: Grinding carbon-containing lead-zinc ore to a particle size of less than 200 mesh accounts for 76%;

<2> Lead flotation: After one lead roughing, three lead refining and three lead sweeping to obtain lead concentrate; for lead roughing, add 50 grams of acetylene ethylene butyl ether, 100 grams of iron chromium lignin and per ton of raw ore 2500 grams of lime, stir for 1 minute, adjust the pH of the slurry to 11.0, then add 80 g/ton of 25# black medicine, mix for 1 minute, add 10 g/ton of 2# flotation oil; Add 40 g/ton of acetylene ethylene butyl ether and iron chrome lignin and 1200 g/ton of lime; three times lead sweeping, add 30, 20, 10 g/ton of 25# black medicine respectively;

<3> Zinc flotation: Zinc concentrate is obtained through one zinc roughing, three zinc beneficiation and three zinc scavenging; for zinc roughing, 1500 g/ton of lime and 1200 g/t copper sulfate are added to the tailings of lead scavenging Tons, pulping for 5 minutes, then adding 70 g/ton of butyl xanthate, 30 g/ton of 2# oil, and pulping for 3 minutes; zinc selection No. 3, adding lime 800 g/ton; three zinc sweeps, each Add 50, 20, 10 g/t of butyl xanthate.

Example 3

<1> Grinding: Grinding carbon-containing lead-zinc ore until the particle size is less than 200 mesh accounts for 90%;

<2> Lead flotation: After one lead roughing, three lead refining and three lead sweeping to obtain lead concentrate; for lead roughing, add 100 grams of acetylene ethylene butyl ether, 25 grams of iron chromium lignin and per ton of raw ore 5000 grams of lime, stirring for 10 minutes, adjusting the pH of the pulp to 11.5, then adding 50 g/ton of 25# black medicine, mixing for 5 minutes, adding 15 g/ton of 2# flotation oil; Add 25 g/ton of acetylene ethylene butyl ether and iron chromium lignin and 2000 g/ton of lime; three times of lead sweeping, add 20, 10, 10 g/ton of 25# black medicine respectively;

<3> Zinc flotation: Zinc concentrate is obtained through one zinc roughing, three zinc beneficiation and three zinc scavenging; for zinc roughing, lime 1000 g/ton and copper sulfate 1500 g/t are added to the lead scavenging tailings Tons, slurry for 10 minutes, then add 100 g/ton of butyl xanthate, 50 g/ton of 2# oil, and mix for 1 minute; zinc selection No. 3, add lime 550 g/ton; three zinc sweeps, each Add 30, 15, 15 g/t of butyl xanthate.

Example 4

<1> Grinding: Grinding carbon-containing lead-zinc ore until the particle size is less than 200 mesh accounts for 82%;

<2> Lead flotation: After one lead roughing, three lead refining and three lead sweeping to obtain lead concentrate; for lead roughing, add 30 grams of acetylene ethylene butyl ether, 30 grams of iron chromium lignin and per ton of raw ore 3000 grams of lime, stirring for 5 minutes, adjusting the pH of the pulp to 10.5, then adding 40 g/ton of 25# black medicine, mixing for 2 minutes, adding 20 g/ton of 2# flotation oil; Add 10 g/ton of acetylene ethylene butyl ether and iron chromium lignin and 800 g/ton of lime; three times lead sweeping, add 20, 10, 10 g/ton of 25# black medicine respectively;

<3> Zinc flotation: Zinc concentrate is obtained after one roughing of zinc, three times of zinc beneficiation and three times of zinc scavenging; for zinc roughing, 1000 g/t of lime and 800 g/t of copper sulfate are added to the tailings of lead scavenging Tons, pulping for 5 minutes, then adding 60 g/ton of butyl xanthate, 30 g/ton of 2# oil, and pulping for 2 minutes; zinc selection No. 3, adding lime 500 g/ton; three zinc sweeps, each Add 30, 10, 10 g/t of butyl xanthate.

The above-mentioned embodiment adopts the refractory high-carbon lead-zinc mine from Urad Rear Banner, Inner Mongolia, the technical indicators obtained and the traditional process (flotation removes part of the charcoal, and the remaining charcoal is suppressed with iron chromium lignin, and the dosage is kerosene 20g/t, Table 1 shows the comparative results of iron chromium lignin 70g/t).

Table 1: Traditional technology and the comprehensive technical index comparison table of the present invention

Claims (2)

1. A carbon-containing lead-zinc ore flotation selects a carbon-removing inhibitor, which is characterized in that the inhibitor contains the following components in parts by weight: 25-100 parts of acetylene ethylene butyl ether, 25-100 parts of iron chromium lignin and 1000-5000 parts of lime. 2. a kind of flotation method using charcoal-containing lead-zinc ore flotation as claimed in claim 1 is selected to remove carbon depressant, it is characterized in that this flotation method comprises the steps: <1> Grinding: Grinding carbon-containing lead-zinc ore until the particle size is less than 200 mesh accounts for 70-90%; <2> Lead flotation: After one lead roughing, three lead refining and three lead sweeping to obtain lead concentrate; for the lead roughing, add 25-100 grams of acetylene butyl ether, 25-100 grams per ton of raw ore Fe-chrome lignin and 1000-5000 grams of lime, stir for 1-10 minutes, adjust the pH of the pulp to 10-11.5, then add 20-80 g/ton of 25# black medicine, and adjust the slurry for 1-5 minutes. Add 10-30 g/ton of 2# flotation oil; in the third lead selection, add 10-40 g/ton of acetylene ethylene butyl ether and iron chromium lignin and 400-2000 g/ton of lime; In the three lead sweeps, add 5 to 30 g/ton of 25# black medicine respectively; <3> Zinc flotation: Zinc concentrate is obtained through one zinc roughing, three zinc beneficiation and three zinc sweeping; Copper 500-1500g/ton, pulping for 1-10 minutes, then add butyl xanthate 40-100g/ton, 2# oil 10-50g/ton, pulping for 1-5 minutes; In the beneficiation, 300-800 g/ton of lime is added; for the three zinc sweeps, 5-50 g/ton of butyl xanthate is added respectively.

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