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Separation method of raw material containing lead

A separation method and technology for raw materials, which are applied to the improvement of process efficiency, calcium/strontium/barium sulfate and other directions, can solve the problems of high separation cost of lead-containing raw materials, difficult separation of lead-zinc, and high cost of desulfurization of lead-containing raw materials

Pending Publication Date: 2020-08-18
北京中金瑞丰环保科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the problems in the prior art that the separation of lead and zinc from low-grade lead-containing raw materials is difficult, the separation cost of lead-containing raw materials is high, and the desulfurization cost of lead-containing raw materials is high, the purpose of the present invention is to provide a method for separating lead-containing raw materials. While separating lead and zinc, it also uses cheap desulfurizers to desulfurize, and converts desulfurization by-products into valuable products. The recovery rate of valuable metals such as lead, and reduce the amount of tailings by recovering calcium, magnesium and iron elements

Method used

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  • Separation method of raw material containing lead

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Effect test

Embodiment 1

[0097] (1) Add 10kg of zinc oxide ore (containing 7.5% zinc, 1.1% lead, 10.4% calcium, and 1.5% magnesium) to a 50L reaction kettle, add water to 50L, and use sulfuric acid to adjust the pH value at 1.0- 1.2, reaction temperature 50°C, react for 5 hours, filter to obtain 45L of zinc-containing solution and 11.5kg of filter residue;

[0098] (2) Adjust the pH value of the filtrate obtained in step (1) to 3.0 with sodium hydroxide, react at 100° C. for 5 hours, and filter to obtain iron oxide slag and filtrate;

[0099] (3) adding 50g of zinc powder to the filtrate gained in step (2), reacting for 4h, filtering to obtain purified slag and filtrate;

[0100] (4) Add 100ml of 30% hydrogen peroxide and 700g of ammonium carbonate to the filtrate obtained in step (3), react at 60°C for 3h, filter to obtain filtrate and purified residue;

[0101] (5) Add the filtrate obtained in step (4) into another reaction kettle, heat and evaporate to 25L, cool to 20°C, and filter to obtain ammon...

Embodiment 2

[0113] (1) Add 100g of scrap lead-acid battery lead paste (70.5% lead) into a 1L reactor, add 50g of sodium sulfate, 35g of cobalt chloride, 15g of nickel nitrate, 25g of nitrilotriacetic acid, and 100g of hydroxyethylethylenediamine Triacetic acid, 25g of ethylenediamine, 100g of diethylenetriamine, add water to make up to 1L, use sodium hydroxide to adjust the pH value between 9.9-10.5, and add 30g of calcium oxide, the reaction temperature is 60°C, react for 5h, filter, Obtain 1L of lead-containing solution and 70g of filter residue;

[0114] (2) Add 5 g of sodium carbonate to the lead-containing solution obtained in step (1), react for 1 h at 70° C., filter to obtain filtrate and purification residue;

[0115] (3) In the solution obtained in step (2), feed carbon dioxide at a speed of 290ml / L, use sodium hydroxide to adjust the pH value of the solution between 7.0-7.5, the reaction temperature is 50°C, and the reaction time is 4h. , separate, wash, dry, obtain 98g lead ca...

Embodiment 3

[0119] (1) Mix 50kg of blast furnace ash (containing 9.1% zinc, 2.3% lead, 40.5% iron, and 2.7% calcium) with 20kg ammonium sulfate, heat treatment at 200°C for 5 hours, then heat up to 500°C, and continue heat treatment for 5 hours , the gas generated during heat treatment is absorbed into lye with water and then cooled;

[0120](2) Add the treated blast furnace ash obtained in step (1) into a 100L reaction kettle, add 1kg of sodium sulfate, adjust the volume to 100L with water, use sulfuric acid to adjust the pH value between 0.8-1.0, and react at a temperature of 90°C. 5h, filter, and wash the filter cake with 20L of water to obtain 100L of zinc-containing solution and 41kg of filter residue;

[0121] (3) adjusting the pH value of the filtrate obtained in step (2) to above 4.0 with lye, reacting at 95° C. for 4 hours, and filtering to obtain the jarosite slag and filtrate;

[0122] (4) adding 1kg of zinc powder to the filtrate gained in step (3), reacting for 4h, filtering...

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Abstract

The invention discloses a separation method of a raw material containing lead, and belongs to the technical field of separation of mixed materials containing lead. According to the separation method of the raw material containing lead, separation between lead and calcium is carried out as the core, separation between lead-calcium and zinc-magnesium is carried out in cooperation, and through circulation of sulfate and alkaline gas, it is implemented that on the premise that the raw material containing lead consumes a small account of sulfur, components of lead, calcium, magnesium and zinc are separated from one another and are transformed into products of lead carbonate, basic zinc carbonate, basic magnesium carbonate and calcium carbonate. According to the separation method of the raw material containing lead, by utilizing the difference between the capacity of dissolving lead and the capacity of dissolving calcium of a reaction fluid, the process of dissolving lead and the process ofcalcium oxide desulfurization in the raw material containing lead in the raw material containing lead are carried out synchronously, and it is implemented that lead and calcium in the same reaction fluid system are separated from each other.

Description

technical field [0001] The invention relates to the technical field of separation of lead-containing mixtures, in particular to a method for separating lead-containing raw materials. Background technique [0002] Lead is a commonly used non-ferrous metal, widely used in storage batteries, cable sheaths, machinery manufacturing, shipbuilding, light industry, lead oxide, radiation protection and other industries. At present, lead mainly comes from primary lead smelted from primary ore and secondary lead recovered from scrapped lead-acid batteries. Lead ore and scrapped lead-acid batteries are characterized by high lead content, and the lead content of lead concentrate can reach 40-70%. , The lead in scrap lead-acid batteries can reach more than 50%. These two raw materials are widely used as lead smelting raw materials because of their high lead content and low smelting cost. In addition to lead concentrates with high lead content and scrapped lead-acid batteries, there are a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/00C22B7/00C22B19/30C22B26/22C01F11/46
CPCC22B13/04C01F11/46C22B7/007C22B7/006C22B19/30C22B19/22C22B26/22Y02P10/20
Inventor 张超武占月刘军飞任佳楠陈建民刘广辉刘向东孙建明王占
Owner 北京中金瑞丰环保科技有限公司
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