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Process for extracting tin from silver separation residues

A silver slag separation and process technology, which is applied in the field of tin extraction process, can solve the problems of incomplete extraction of tin powder, insufficient product purity, waste of raw materials, etc., and achieve good use prospects, low cost, and improved purity.

Inactive Publication Date: 2019-06-07
柳州光华科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing technology for extracting tin from the silver slag cannot completely extract the tin powder in the mine, and it is easy to make the purity of the product not enough. At the same time, it is easy to cause waste of raw materials in the production process, and the process is more complicated. For this reason , we propose a process for extracting tin from silver slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take an appropriate amount of silver slag for crushing treatment, mix and refine the pulverized silver slag and flocculant according to the mass ratio of 1:10, and mix evenly to obtain a mixed solution of silver slag and water; mix the silver slag and water The solution was poured into the mixing furnace, heated to 560°C, and stirred for 20 minutes. After the stirring was completed, it was left to stand for 3 hours; the mixed solution stirred in step 2 was filtered four times using a high-pressure filter group, and the first filtration was carried out at 40m Filter at a speed of / h, filter at a speed of 45m / h for the second time, filter at a speed of 50m / h for the third time, and filter at a speed of 55m / h for the fourth time; carry out low-temperature oxidation roasting treatment on the filtered silver slag , the temperature in the low-temperature oxidation roasting is controlled within 50°C, and the rate of introducing oxygen-enriched air is 6L / min. After the silver sl...

Embodiment 2

[0024] Take an appropriate amount of silver slag for crushing treatment, mix and refine the pulverized silver slag and flocculant according to the mass ratio of 1:10, and mix evenly to obtain a mixed solution of silver slag and water; mix the silver slag and water The solution was poured into the mixing furnace, heated to 850°C, and stirred for 20 minutes. After the stirring was completed, it was left to stand for 6 hours; the mixed solution stirred in step 2 was filtered four times using a high-pressure filter group, and the first filtration was carried out at 40m Filter at a speed of / h, filter at a speed of 45m / h for the second time, filter at a speed of 50m / h for the third time, and filter at a speed of 55m / h for the fourth time; carry out low-temperature oxidation roasting treatment on the filtered silver slag , the temperature in the low-temperature oxidation roasting is controlled within 50°C, and the rate of introducing oxygen-enriched air is 8L / min. After the silver sl...

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Abstract

The invention discloses a process for extracting tin from silver separation residues. The process comprises the steps that 1, a proper amount of the silver residues are picked and subjected to crushing treatment, the silver residues obtained after crushing are mixed with a flocculating agent according to the mass ratio of 1: 10 and ground into thick liquid, and the materials are mixed uniformly, so that a mixed solution of the silver residues and water is obtained; 2, the mixed solution of the silver residues and the water is poured into a holding furnace, the temperature is raised to 560-850DEG C, stirring is conducted for 20 minutes, and after stirring is completed, the materials are left standing still for 3-6 hours; and 3, filter treatment is conducted on mixed liquor obtained after stirring is completed in step 2 four times through a high-pressure filter, wherein filtration of the first time is conducted at the speed of 40 m / h. According to the process for extracting the tin fromthe silver separation residues, filtration is conducted multiple times, and it can be guaranteed that impurities in the silver residues are filtered out completely; the purity of an obtained productis improved; meanwhile, under the atmosphere of carbon dioxide, the impurities in the silver residues can be separated out, and the purity of the obtained product is further improved; in addition, under the atmosphere of nitrogen gas, a chemical reaction can take place stably; and the preparation process is simple and low in cost, and the better application prospect is achieved.

Description

technical field [0001] The invention belongs to the field of new materials, in particular to a process for extracting tin from silver-separating slag. Background technique [0002] Tin, a metallic element, is a metallic element with a silver-white luster and a low melting point. It is divalent or tetravalent in the compound and will not be oxidized by air. It is mainly composed of dioxide (cassiterite) and various sulfides ( such as sulfur cassiterite); [0003] However, the existing technology for extracting tin from the silver slag cannot completely extract the tin powder in the mine, and it is easy to make the purity of the product not enough. At the same time, it is easy to cause waste of raw materials in the production process, and the process is more complicated. For this reason , we propose a process for extracting tin from silver slag. Contents of the invention [0004] The main purpose of the present invention is to provide a process for extracting tin from silv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B25/06
CPCY02P10/20
Inventor 陈萍姬周莉陈华
Owner 柳州光华科技有限公司
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