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Low-temperature detinning method for secondary lead bullion

A crude lead and low temperature technology, applied in the field of resource environmental protection and heavy metal pollution prevention and control, can solve the problems of tin waste, high production cost, loss, etc., achieve the effect of simple process and operation, reduce production cost, and reduce volatilization

Inactive Publication Date: 2015-11-25
湖北金洋冶金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the recovery of these metals from other materials and their recycling have attracted people's attention. Kunming University of Science and Technology has adopted vacuum metallurgy technology to extract the main components such as lead and antimony in the crude lead alloy through distillation, separation and purification. , tin is enriched, so as to achieve the purpose of separation of lead, antimony and tin, so that the metal can be regenerated and widely used, but the production cost is high; the method of efficiently separating and enriching tin from nickel-tin-iron alloy waste in the research institute of Yunnan Tin Industry Company is The vulcanizing agent is blown into the molten pool through the spray gun, and the tin removal is carried out through the vulcanization detinning reaction. The temperature is 1500-1650 °C, and the temperature is relatively high. Tin metal can not be effectively used, resulting in a waste of resources
[0003] Crude lead in recycled lead enterprises generally contains 1.0-1.5% tin and 0.5-2.5% antimony. The repeated circulation of tin in this crude lead during the high-temperature smelting process causes tin waste and loss, and increases the cost of cleaning impurities in the smelting process

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  • Low-temperature detinning method for secondary lead bullion

Examples

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Embodiment 1

[0027] Put 100 tons of regenerated crude lead (antimony and tin content) into the alloy furnace. When the temperature of the lead liquid in the alloy furnace rises to 380°C, divide 30Kg of sodium chloride into four equal parts, and add 7.5Kg every 3 minutes; 15Kg of sodium nitrate is also divided into four equal parts, and 3.75Kg is added at an interval of 3 minutes. This process has been in a stirring state. Stir for 30 minutes to allow it to fully react, then add sodium hydroxide to the alloy furnace, and divide the amount of 120Kg sodium hydroxide into 6 equal parts, add 40Kg for the first time, add once every 5 minutes, add 20Kg for the last four times, and keep stirring during this process. After 120 minutes of reaction, if the slag is a little thinner by visual inspection, before removing the slag 30 Then add 3Kg of sodium nitrate in 1 minute (if the slag is not thin by visual inspection, do not add sodium nitrate). When the slag is yellow or dark yellow granular, fish o...

Embodiment 2

[0029] Put 120 tons of regenerated crude lead (antimony and tin content) into the alloy furnace. When the temperature of the alloy furnace rises to 380°C, divide 48Kg of sodium chloride into four equal parts and add 12Kg every 3 minutes; then add 24Kg of sodium nitrate Divide into four equal parts, add 6Kg at intervals of 3 minutes, this process has been in a stirring state, stir for 40 minutes to allow it to fully react, then add sodium hydroxide to the alloy furnace, divide the amount of 240Kg sodium hydroxide into 6 equal parts, the first Add 80Kg at a time, add once every 5 minutes, add 40Kg for the last four times, and keep stirring during this process. After 120 minutes of reaction, if the slag is a little thinner by visual inspection, add 5Kg of slag 30 minutes before removing the slag. sodium nitrate. When the slag is yellow or dark yellow granular, fish out the high-grade tin-containing slag; after analysis, the high-tin slag contains 46% tin, and the recovery rate of...

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Abstract

The invention relates to a low-temperature detinning method for secondary lead bullion. The secondary lead bullion is fed into an alloying furnace, the temperature rises, and the secondary lead bullion is molten; when the alloy temperature rises to 380-420 DEG C, sodium chloride and sodium nitrate of the appropriate amount are fed into in batches and stirred for 30-40 minutes; then sodium nitrate and sodium hydroxide of the appropriate amount are fed into alloy fluid; the sodium nitrate and the sodium hydroxide are stirred into yellow or dark yellow particles after reacting for 120-150 minutes; and particle-shaped solder splash is fished out, valuable metal antimony is left in lead fluid, and the solder splash with higher solder content is obtained. In addition, the solder content of the solder splash can reach 40-50%.

Description

technical field [0001] The invention relates to a method for recycling metal tin secondary resources, in particular to a method for low-temperature detinning of regenerated crude lead, and belongs to the field of resource environmental protection and heavy metal pollution prevention and control. Background technique [0002] With the continuous development of science and technology, the application fields of valuable metals tin and antimony are also expanding. Therefore, the recovery of these metals from other materials and their recycling have attracted people's attention. Kunming University of Science and Technology has adopted vacuum metallurgy technology to extract the main components such as lead and antimony in the crude lead alloy through distillation, separation and purification. , tin is enriched, so as to achieve the purpose of separation of lead, antimony and tin, so that the metal can be regenerated and widely used, but the production cost is high; the method of ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B25/06
CPCY02P10/20
Inventor 王进李顺海常银甫
Owner 湖北金洋冶金股份有限公司