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Method for processing tin refining sulfur slag

A treatment method and sulfur slag technology, applied in the direction of improving process efficiency, etc., can solve the problems of many process flows and large mechanical loss of tin, etc., and achieve the effect of simple process, convenient operation, safe and controllable process

Inactive Publication Date: 2014-02-19
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many processes in this process, the mechanical loss of tin is relatively large, and the recovery rate of tin is 95%.

Method used

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  • Method for processing tin refining sulfur slag

Examples

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Comparison scheme
Effect test

Embodiment 1

[0011] Such as figure 1 As shown, the treatment method of the tin refining sulfur slag, the specific steps are as follows: First, mix 100g of tin refining sulfur slag and vulcanizing agent according to the Sn:S molar ratio of 1:1 to obtain a mixed material, and then put the mixed material into a vacuum furnace In the reaction time, the pressure is 1Pa and the temperature is 700°C for 50 minutes to prepare copper or matte and solid stannous sulfide on the condenser.

[0012] Among them, the tin refining sulfur slag comes from the tin refining process of sulfur addition and copper removal, including the following components in mass percentage: Sn40%, Cu20%, S10%; the vulcanizing agent is sulfur.

[0013] Finally, the quality of volatile matter is 64.7g, carries out phase analysis to this volatile matter, and main component is stannous sulfide, and tin content is 39.28g in the volatile matter through chemical analysis and calculation, and tin direct recovery rate is 98.2%, and co...

Embodiment 2

[0015] Such as figure 1 As shown, the treatment method of the tin refining sulfur slag, the specific steps are as follows: First, mix 100g of tin refining sulfur slag and vulcanizing agent according to the Sn:S molar ratio of 1:2.5 to obtain a mixed material, and then put the mixed material into a vacuum furnace Within the reaction time of 1min at a pressure of 100Pa and a temperature of 1200°C, copper or matte and solid stannous sulfide on the condenser can be prepared.

[0016] Among them, the sulfur slag from tin refining comes from the tin refining sulfur addition and copper removal process, including the following components in mass percentage: Sn80%, Cu10%, S5%; the vulcanizing agent is pyrite, and pyrite contains the following components in mass percentage : Fe46.67%, S53.33%.

[0017] Finally, the quality of volatile matter is 93.6g, carries out phase analysis to this volatile matter, and main component is stannous sulfide, and tin content is 78.8g in the volatile mat...

Embodiment 3

[0019] Such as figure 1 As shown, the treatment method of the tin refining sulfur slag, the specific steps are as follows: First, mix 100g of tin refining sulfur slag and vulcanizing agent according to the Sn:S molar ratio of 1:1.5 to obtain a mixed material, and then put the mixed material into a vacuum furnace In the reaction time, the pressure is 50Pa and the temperature is 1000°C for 30 minutes to prepare copper or matte and solid stannous sulfide on the condenser.

[0020] Among them, the tin refining sulfur slag comes from the process of adding sulfur to copper and removing copper from tin refining, and includes the following components in mass percentage: Sn60%, Cu14%, S7%; the vulcanizing agent is sulfur.

[0021] Finally, the quality of volatile matter is 75.8g, carries out phase analysis to this volatile matter, and main component is stannous sulfide, and tin content is 58.98g in the volatile matter through chemical analysis and calculation, and tin direct recovery r...

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Abstract

The invention relates to a method for processing tin refining sulfur slag and belongs to the technical field of non-ferrous metal pyrometallurgy. The method comprises the following steps: firstly, uniformly mixing the tin refining sulfur slag and a vulcanizing agent according to a molar ratio of Sn to S of 1:(1 to 2.5) to obtain mixed materials; then placing the mixed materials into a vacuum furnace and performing the reaction for 1 to 50 min under a pressure of 1 to 100 Pa and a temperature of 700 to 1,200 DEG C so as to obtain copper or copper matte and solid stannous sulfide on a condenser. According to the method, a vacuum distillation process is adopted and tin reacts with the vulcanizing agent under the vacuum high temperature condition to obtain the stannous sulfide and the copper matte so as to implement separation and recovery of tin and copper in the tin refining sulfur slag; the method adopts the simple process, has a safe and controllable process, is convenient to operate, has a tin direct recovery rate of over 98 percent, has a copper removal rate of over 96 percent and has no pollution to the environment.

Description

technical field [0001] The invention relates to a treatment method for tin refining sulfur slag, belonging to the technical field of nonferrous metal pyrometallurgy. Background technique [0002] During the crude tin refining process, the scum salvaged after adding sulfur to remove copper is called sulfur slag. Sulfur slag generally contains more than 60% tin, and its main impurities are copper and sulfur. Since the amount of sulfur slag in tin smelters in my country is increasing year by year, a large amount of tin is accumulated in sulfur slag, which has long been a need in the production of tin smelters. solved puzzles. The tin and copper contained in sulfur slag have considerable economic value. In order to effectively solve this problem, various tin metallurgical enterprises and scientific research institutes have done many researches on the treatment methods of sulfur slag. Wrapping each other, the separation and recovery of tin and copper by the previous treatment me...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B15/00
CPCY02P10/20
Inventor 李一夫杨斌戴卫平徐宝强速斌刘大春戴永年张洋洋
Owner KUNMING UNIV OF SCI & TECH
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