Method for recovering and regenerating refined tin from tin foil ash

A technology of tin foil ash and soot, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of large pollution and low tin recovery rate, and achieve the effects of small pollution, reduced tin loss, and reduced pollution

Inactive Publication Date: 2020-06-05
马鞍山市伟泰锡业有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems in the prior art that the recovery rate of tin in tin foil ash is low and the pollution is large during recovery, the present invention provides a method for recovering regenerated refined tin from tin foil ash, through pre-smelting treatment, reduction smelting, fractional refining, electrolysis Refining provides a recovery method with high recovery rate, low pollution and low cost for the incinerated tin foil ash, and the recovery effect is far better than the traditional tin foil ash recovery method

Method used

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  • Method for recovering and regenerating refined tin from tin foil ash
  • Method for recovering and regenerating refined tin from tin foil ash
  • Method for recovering and regenerating refined tin from tin foil ash

Examples

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Effect test

Embodiment 1

[0059] Such as figure 1 As shown, the method for reclaiming regenerated refined tin from tin foil ash in this embodiment is to add 30 tons of tin foil ash containing 35% Sn to 3 tons of water and stir it into pellets in a disc granulator. The pellets are fed into the rotary kiln, the kiln is 20m long, 1.8m in diameter, 2-3° inclination, 1 rpm, heated and sintered with natural gas in the rotary kiln, the temperature is 500℃, moisture and combustibles are removed, and sintered balls are obtained. 28.5 tons of lump raw materials and 1.5 tons of soot;

[0060] Take 10 tons of sintered tin foil ash pellets as raw material, add 0.8 tons of coal powder, 0.3 tons of quartz sand and 0.3 tons of limestone, and add them to the submerged electric furnace for reduction smelting. The bottom of the furnace is covered with a coke layer with a particle size of 25mm and a thickness of 250mm. Inserted at a distance of 150mm from the coke layer, the temperature reached 900°C for smelting, and t...

Embodiment 2

[0073] Such as figure 1 As shown, the method for recovering regenerated refined tin from tin foil ash in this embodiment is to add 30 tons of tin foil ash containing 38% Sn to 3.6 tons of water and stir it into pellets in a disc granulator. The pellets are sent to the rotary kiln, the kiln is 20m long, 1.8m in diameter, 2-3° inclination, 1 rev / min, heated and sintered with natural gas in the rotary kiln, the temperature is 550°C, moisture and combustibles are removed, and sintered balls are obtained. 28.65 tons of lump raw materials and 1.35 tons of soot;

[0074] Take 10 tons of sintered tin foil ash pellet raw materials, add 0.9 tons of coal powder, 0.5 tons of quartz sand and 0.5 tons of limestone, and add them to the submerged electric furnace for reduction smelting. The bottom of the furnace is covered with a coke layer with a particle size of 45mm and a thickness of 280mm. Inserted at a distance of 150mm from the coke layer, the temperature reached 1000°C for smelting,...

Embodiment 3

[0087] Such as figure 1 As shown, the method for recovering regenerated refined tin from tin foil ash in this embodiment is to add 30 tons of tin foil ash containing 40% Sn to 4.5 tons of water and stir it into pellets in a disc granulator. The pellets are then sent to the rotary kiln, the kiln is 20m long, 1.8m in diameter, 2-3° inclination, 1 rev / min, heated and sintered with natural gas in the rotary kiln, the temperature is 600℃, moisture and combustibles are removed, and sintered balls are obtained 28.8 tons of lump raw materials and 1.2 tons of soot;

[0088] Take 10 tons of sintered tin foil ash pellet raw materials, add 1.0 tons of coal powder, 0.6 tons of quartz sand and 0.6 tons of limestone, and add them to the submerged thermal electric furnace for reduction smelting. Inserted at a distance of 150mm from the coke layer, the temperature reached 1100°C for smelting, and the feeding was divided into three times, the first feeding was 4 tons, the second feeding was 4...

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Abstract

The invention discloses a method for recovering and regenerating refined tin from tin foil ash, and belongs to the field of metal resource regeneration. The method comprises the following steps of S1,smelting pre-treatment, specifically, after water is added into the tin foil ash, granulating and sintering are conducted to form a pellet raw material; S2, reduction smelting, specifically, the pellet raw material obtained in the S1 is subjected to the reduction smelting, and crude tin alloy is obtained; S3, fractionating and refining, specifically, the fractionating and refining are conducted on the crude tin alloy of the S2 to obtain a tin-based alloy and a lead-antimony alloy; and S4, electrolytic refining, specifically, the tin-based alloy obtained in the S3 is melted and cast into an anode plate, the refined tin is used for manufacturing a cathode plate, electrolytic refining is conducted, and a refined tin product is obtained. According to the method for recovering and regeneratingthe refined tin from the tin foil ash, through the smelting pre-treatment, the reduction smelting, the fractionating and refining and the electrolytic refining, the recovery method which is high in recovery rate and capable of reducing pollution and cost is provided for the incinerated tin foil ash, and the recovery effect is far superior to that of a traditional tin foil ash recovery method.

Description

technical field [0001] The invention belongs to the field of metal resource regeneration, and more specifically relates to a method for recycling refined tin from tin foil ash. Background technique [0002] Burning sacrifices to express mourning is one of the traditional folk activities in our country. The sacrifices are mostly tin foil rolled from tin alloy ingots, which are cut into gold and silver ingots of different sizes and denominations with paper as the backing. Ming coins, livestock, vehicles and boats, household appliances, houses and many other items. The burning of sacrifices will cause a lot of environmental pollution. Although it has been controlled in the past two years, the annual consumption of burning sacrifices is still huge, and the burning of tin sacrifices will produce a large amount of tin foil ash, which contains a large amount of tin elements. , copper, lead, antimony and other metal elements, if they cannot be effectively recovered, it will be a se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/16C22B1/24C22B4/06C22B5/10C22B9/02C22B9/04C22B13/02C22B25/02C22B25/06C22B30/02C25C1/14
CPCC22B1/16C22B1/2406C22B4/06C22B5/10C22B7/001C22B9/02C22B9/04C22B13/025C22B25/02C22B25/06C22B30/02C25C1/14Y02P10/20
Inventor 章静波周锡章景忠
Owner 马鞍山市伟泰锡业有限公司
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