Treatment method of coarse tin decoppered slag

A treatment method and technology of crude tin, which is applied in the field of copper slag removal from crude tin, can solve the problems of long process flow, large power consumption, high production cost, etc., and achieve short process flow, low energy consumption and high direct recovery rate Effect

Inactive Publication Date: 2013-01-02
LAIBIN CHINA TIN SMELTING
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  • Abstract
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AI Technical Summary

Problems solved by technology

This process has the advantages of high copper recovery rate, fast recovery of tin, and no external discharge of waste residue and wastewater; its disadvantages are: ①The electrolysis process is labor-intensive, all materials need to be manually packed into plastic composite bags, and electrolysis of anode slime requires manual labor. Collected from plastic composite bags, ②The direct recovery rate of tin in the electrolysis process is low, generally only 40-50%; ③The anode slime is brought into the electrolytic solution of fluorosilicic acid, which will seriously corrode the dust collection bag during subsequent roasting and reduction smelting , resulting in metal loss, ④ long process flow, large power consumption, high production cost

Method used

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  • Treatment method of coarse tin decoppered slag

Examples

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Effect test

no. 1 example

[0022] Present embodiment is the first example of the processing method of thick tin copper slag of the present invention, comprises the steps:

[0023] (1) High-temperature oxidation: put 3 tons of coarse tin decopper slag containing 50.5% tin and 19.5% copper into a top-blown converter with an inner diameter of 1.8 meters and an inner length of 2.1 meters. 93% oxygen, at a flow rate of 10 cubic meters per hour, is sprayed onto the surface of the coarse tin copper removal slag, and the coarse tin copper removal slag is completely oxidized into dust. The oxidation process lasts for 120 minutes and consumes 1200 cubic meters of industrial oxygen. A total of oxidized 3.3 tons of copper and tin tetroxide dust, the dust contains an average of 45.7% tin and 17.8% copper.

[0024] (2) Acidic leaching at normal temperature and pressure: Put 3.3 tons of dust containing 45.7% tin and 17.8% copper into a leaching tank of 20 cubic meters, and add 15 cubic meters of leach solution with an...

no. 2 example

[0028] Present embodiment is the second example of the processing method of thick tin copper slag of the present invention, comprises the steps:

[0029] (1) High temperature oxidation: put 3 tons of crude tin decopper slag containing 65% tin and 13% copper into a top-blown converter with an inner diameter of 1.8 meters and an inner length of 2.1 meters. 97% industrial oxygen is sprayed onto the surface of the coarse tin copper removal slag at a flow rate of 10 cubic meters per hour, and all the coarse tin copper removal slag is oxidized into dust. The oxidation process lasts for 120 minutes and consumes 1200 cubic meters of industrial oxygen, which is collected in total 3.4 tons of copper oxide and tin tetroxide dust, the dust contains an average of 57.3% tin and 11.5% copper.

[0030] (2) Normal temperature and pressure leaching: put 3.4 tons of dust containing 57.3% tin and 11.5% copper into a leaching tank of 20 cubic meters, add 15 cubic meters of leaching solution with a...

no. 3 example

[0034] Present embodiment is the 3rd example of the processing method of thick tin copper slag removal described in the present invention, comprises the steps:

[0035](1) High-temperature oxidation: put 4 tons of crude tin decopper slag containing 75% tin and 8% copper into a top-blown converter with an inner diameter of 1.8 meters and an inner length of 2.1 meters. 98.5% industrial oxygen is sprayed onto the surface of the coarse tin copper removal slag at a flow rate of 10 cubic meters per hour, and the coarse tin copper removal slag is completely oxidized into dust. The oxidation process lasts for 160 minutes and consumes 1600 cubic meters of industrial oxygen. 4.7 tons of copper oxide and tin tetroxide dust, the dust contains an average of 63.8% tin and 6.81% copper.

[0036] (2) Normal temperature and pressure leaching: 4.7 tons of dust containing 63.8% tin and 6.81% copper, add 20 cubic meters of leaching tank, add 16 cubic meters of leaching solution with an initial ac...

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Abstract

The invention relates to a treatment method of coarse tin decoppered slag, which comprises the following steps: jetting industrial oxygen with the purity of 93-98.5% to the surface or inside of the coarse tin decoppered slag at the temperature of 850-1250 DEG C until the coarse tin decoppered slag is completely oxidized into copper oxide and tin tetroxide dust; leaching the copper oxide and tin tetroxide dust for 2-3 hours under atmospheric pressure and temperature under the condition of the initial acid of 70-120 g/L to obtain leached filtered slag, and carrying out reduction smelting to produce coarse tin; concentrating the leached filtrate to crystallize, and separating to produce chalcanthite product, or carrying out electrolysis to produce electrolytic copper; and returning the crystallization mother solution or electrolysis solution to the leaching process for solution preparation. The invention can separate tin and copper in the crude tin decoppered slag in a safe and efficient way, and does not generate waste water, waste gas or waste residue.

Description

technical field [0001] The invention relates to the field of nonferrous metal smelting, in particular to a method for treating crude tin and copper slag removal. Background technique [0002] After the tin concentrate is boiled and roasted to remove most of the sulfur and arsenic, the tin calcine is produced; the tin calcine is mixed with an appropriate proportion of reduced coal, and the reduction smelting is carried out in a reverberatory furnace, an electric furnace or an Ausmelt furnace to produce Out of crude tin. In the reduction smelting process, the copper in the tin calcine is reduced to metallic copper and dissolved in the liquid crude tin in the reverberatory furnace, electric furnace or Ausmelt furnace; during the refining process of the liquid crude tin, sulfur is added to remove Copper, the slag containing 50-75% tin and 8-20% copper produced during copper removal, that is, crude tin copper removal slag, also known as sulfur slag, S slag or copper slag. The m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B15/00C22B25/02
CPCY02P10/20
Inventor 陶政修王学洪蒋光佑陈光耀潘久华罗祥海李德锦韦晓岚
Owner LAIBIN CHINA TIN SMELTING
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