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Method for removing arsenic and recovering valuable metal from ilmenite smoke dust

A valuable metal, ilmenite technology, applied in the field of comprehensive utilization of resources, can solve the problems of low efficiency and high processing cost, and achieve the effects of low cost, efficient recovery and convenient operation

Active Publication Date: 2019-02-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the technical problems of high cost and low efficiency in the treatment of ilmenite arsenic dust in the prior art, the purpose of the present invention is to provide a method for leaching, transforming and flotation separation of arsenic in ilmenite dust, so as to To achieve the purpose of effectively separating the arsenic component from other metals, and at the same time effectively recover the valuable metals in the leach slag and flotation residual liquid after arsenic removal; this method has the advantages of simple, fast, efficient, simple process, and convenient operation. And it is of great significance to realize the comprehensive utilization of ilmenite dust resource

Method used

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  • Method for removing arsenic and recovering valuable metal from ilmenite smoke dust

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Embodiment 1

[0033] The above method is used to treat the ilmenite dust containing 6.077% of arsenic, 12.88% of zinc and 20.50% of iron. Put 600g of ilmenite soot into 3L of sodium hydroxide solution with a concentration of 18g / L for alkaline leaching, control the leaching temperature at 90°C, and leaching time for 1h, so that the arsenic oxides and zinc oxides in the ilmenite soot The compound is converted into arsenic salt and zinc salt and dissolved in the leach solution, and the solid and liquid are separated to obtain a leach solution containing arsenic salt and zinc salt, and a leach residue containing valuable metals such as iron; slowly add 70g of Benzyl chloride is subjected to arsenic conversion reaction, the temperature is controlled at 75°C, and the reaction time is 5h to obtain a sodium benzyl arsenic acid solution; the reacted solution is transferred to a flotation cell, and 500g / t calcium carbonate (-200~+400 Purpose) After fully reacting for 25 minutes, carry out flotation ...

Embodiment 2

[0043] The above method is used to treat the ilmenite dust containing 1.98% of arsenic, 20.33% of zinc and 32.12% of iron. Put 600g of ilmenite soot into 3L of water with a sodium hydroxide concentration of 6g / L for alkaline leaching, control the leaching temperature at 90°C, and leaching time for 2h, so that the arsenic oxide and zinc oxide compounds in the ilmenite soot Converted into arsenic salt and zinc salt, dissolved in the leach solution, filtered to obtain leach solution containing arsenic salt and zinc salt, and leach residue containing valuable metals such as iron; slowly add 25g of benzyl chloride with a mass fraction greater than 99.5% in the leach solution Carry out arsenic conversion reaction to obtain sodium benzyl arsenate solution, control the temperature at 75°C, and react for 5 hours; transfer the reacted solution into a flotation cell, and add 500g / t calcium carbonate (-200~+400 mesh) to fully After 30 minutes of reaction, carry out flotation, and collect ...

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Abstract

The invention discloses a method for removing arsenic and recovering valuable metal from ilmenite smoke dust. The method comprises the steps of leaching ilmenite smoke dust through strong alkali to obtain a leaching solution containing arsenate and zincate and iron-containing leaching slag; adding benzyl chloride to the leaching solution to convert arsenate into benzyl-arsine; then adding a particle carrier for adsorbing the benzyl-arsine; fully floating and separating to obtain benzyl-arsine salt; neutralizing the floating separating liquid core, and separating out a zinc hydroxide product; adding water to the iron-containing leaching slag; stirring and mixing the slurry; and then adding a flocculating agent and a collecting agent for floating and separating so as to obtain iron ore concentrate. With the adoption of the method, the purpose of removing arsenic is achieved, and moreover, iron and zinc products can be recovered, so that the resource comprehensive utilization of the ilmenite smoke dust can be realized; and the method is simple, quick, efficient, and low in cost and meets the industrial production.

Description

technical field [0001] The invention relates to a method for treating ilmenite fumes, in particular to a method for leaching, transforming and separating arsenic from ilmenite fumes to realize arsenic removal from ilmenite fumes and efficient recovery of valuable metals, which belongs to the comprehensive resource utilization technology field field. Background technique [0002] Arsenic and its compounds are volatile. During the ilmenite smelting process, arsenic will be enriched in the smelting dust. It has the characteristics of large output, high content of valuable metals (iron, zinc, gold, silver, antimony) and high toxicity. For these harmful arsenic-containing dusts, two processes were generally used in the past: first, dusts with low arsenic content were directly returned to the smelting process. Although the valuable metals can be used in this way, the arsenic will circulate and accumulate in the production system, which will lead to the deterioration of production...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B3/12C22B3/44
CPCC22B3/12C22B3/44C22B7/008C22B7/02Y02P10/20
Inventor 韩海生田佳孙伟胡岳华王丽杨越孙磊刘若华张荥斐岳彤
Owner CENT SOUTH UNIV
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