Trentment method of tin copper slag

A slag treatment, tin-copper technology, applied in the field of combined fire-wet treatment of tin-copper slag, can solve the problems of long process flow, high treatment cost, poor economic benefits, etc., achieve simple and feasible process, good environmental effect and low production cost Reduced effect

Inactive Publication Date: 2006-06-14
云南锡业集团有限责任公司
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Problems solved by technology

[0003] (1) Pyromelting: A certain proportion of flux is mixed in a short kiln for smelting to produce semi-products of tin-copper alloy. Due to the large amount of impurities in the slag entering the alloy, it is difficult to further process the alloy product
[0004] (2) Roasting-leaching method: After the tin-copper slag is roasted, sulfuric acid is used to leaching the calcine, so that copper is opened from the tin smelting system in the form of copper sulfate products. This method has a low softening point of the tin-copper slag due to the existence of a large amount of metallic tin. , it is necessary to carry out multi-stage roasting to achieve the purpose of roasting wi

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  • Trentment method of tin copper slag

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Embodiment

[0024] Take 6kg of tin-copper slag with the following composition, and use 30L to contain Cu 2+ 40g / l CuSO 4 The solution was leached under normal pressure for 3 hours at a temperature of 85-90°C and a liquid-solid ratio of 5:1 to obtain 28L of stannous sulfate solution containing Sn 58.04g / l, Cu<0.001g / l and 6.1kg of leaching residue.

[0025] Cu

[0026] Above-mentioned stannous sulfate solution obtains 2.5kg of stannous sulfate product after evaporation concentration, crystallization by cooling, and product quality is as follows.

[0027] SnSO 4

[0028] The above-mentioned leaching slag was oxidized and roasted at 700°C for 2 hours, and the calcined sand obtained was 120g / lH 2 SO 4 Solution 30L was leached at 85°C for 1 hour to obtain 29L copper sulfate solution containing Cu71.18g / l and 3.6kg leaching residue (tin concentrate) containing Cu1.24% and Sn62%.

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Abstract

The invention relates to a tin copper scale fire wet method combining treatment method. It can use simple technique to produce top stannous sulfate product. The tin copper scale is a high tin low copper middle material, packed by tin and copper. The invention combines tin copper scale treatment and stannous sulfate preparing, adopts respectively two segment atmospheric pressure leaching method for copper sulfate test and sulfuric acid solution to effectively separate copper from the tin copper scale, and gain high quality tin fine mineral product, copper sulfate product and stannous sulfate product.

Description

technical field [0001] The invention belongs to a treatment method for removing copper slag from tin refining, and in particular relates to a fire-wet combined treatment method for tin-copper slag. Background technique [0002] In the tin smelting process, after the tin concentrate is reduced and smelted into crude tin, due to the presence of copper in the tin smelting raw materials, the copper content in the crude tin is relatively high. Therefore, sulfur addition and copper removal operations are required to form a copper-containing Tin-copper slag (also known as sulfur slag) with a tin content of 10-30% and a tin content of 30-80%. Most of the tin in this slag exists in the form of metal, oxide or alloy, and most of the copper is in the form of copper sulfide (Cu 2 S) form exists. There are mainly the following methods for the treatment of such tin-copper slag at home and abroad: [0003] (1) Pyromelting: A certain proportion of flux is added to smelt in a short kiln t...

Claims

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Application Information

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IPC IPC(8): C22B25/08C22B3/04C22B9/00
CPCY02P10/20
Inventor 唐芸生李元昌张雄林杨成林
Owner 云南锡业集团有限责任公司
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