Method for separating and extracting calcium tungstate and tin slag by utilizing tungsten-containing tin furnace residue or tungsten-tin middlings

A technology of calcium tungstate and slag, applied in chemical instruments and methods, tungsten compounds, calcium/strontium/barium compounds, etc., can solve problems such as failure to achieve comprehensive utilization of resource recycling, failure to recycle tin, waste of tin resources, etc. Achieve the effect of large production capacity, wide application range of raw materials and low investment

Inactive Publication Date: 2008-03-26
黄玄俊
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Problems solved by technology

[0002] At present, my country has not yet used tungsten-containing tin slag or tungsten-tin mixed medium ore to fully separate tungsten and tin, produce and extract tungsten products, and obtain tin slag for tin smelting. Tungsten in tin slag is used to produce crude sodium tungstate, but tin cannot be recycled. Some research institutions have also conducted a lot of experimental research on sorting, but it is difficult to achieve the purpose of sorting, which will cause waste of tin resources and fail to achieve The purpose of resource recycling and comprehensive utilization

Method used

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Examples

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example

[0018] Example: now contains WO 3 The content is 5.1%, the Sn content is 6.2%, and the tin slag containing tungsten is 2kg, producing the 3 Taking 52% calcium tungstate and tin dross containing 5.9% Sn as an example, the steps are as follows:

[0019] Take 2kg of the tungsten-containing tin slag with the above content and grind it to a fineness of -200 mesh above 99%, use 1600ml of NaOH aqueous solution with a concentration of 410g / L, add 140g of oxidant, stir evenly, and send it into a 5L high-pressure reactor Inside, steam was sent to boost the pressure to 4kg, the temperature was 140°C, and the reaction was pressure-cooked and stirred for 3 hours.

[0020] After the pressure cooking reaction is completed, the slurry is filtered, and solid-liquid separation is carried out to obtain Na 2 WO 4 solution and containing 5.9% tin, containing WO 3 The tin dross is 0.31%, and the obtained tin dross is used as a raw material for tin smelting.

[0021] Na 2 WO 4 Dilute the solu...

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Abstract

The process of separating and extracting calcium tungstate and tin slag from tungsten-containing tin slag or mixed W-Sn middlings includes the steps of grinding tungsten-containing tin slag or mixed W-Sn middlings into powder, adding NaOH and oxidant through high pressure stirring and leaching to obtain Na2WO4 solution with impurity and tin slag, depurating the Na2WO4 solution to obtain purified Na2WO4 solution, adding CaCl2 to react obtaining wet CaWO4 and stoving to obtain calcium tungstate. The process is simple, and has great production capacity, best utilization of non-ferrous metal resource, environment friendship and other advantages.

Description

technical field [0001] The invention relates to a process for separating and extracting calcium tungstate and slag for tin smelting by using tungsten-containing tin slag, tungsten-tin middle ore or other tungsten-tin slag produced in the tin smelting process of a tin smelter. Background technique [0002] At present, my country has not yet used tungsten-containing tin slag or tungsten-tin mixed medium ore to fully separate tungsten and tin, produce and extract tungsten products, and obtain tin slag for tin smelting. Tungsten in tin slag is used to produce crude sodium tungstate, but tin cannot be recycled. Some research institutions have also conducted a lot of experimental research on sorting, but it is difficult to achieve the purpose of sorting, which will cause waste of tin resources and fail to achieve The purpose of resource recycling and comprehensive utilization. Contents of the invention [0003] The method of the present invention is to overcome the above-mentione...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00C01F11/00
Inventor 黄玄俊
Owner 黄玄俊
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