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Lead-containing raw material wet recovery treatment method

A technology of recovery treatment and treatment method, which is applied in the field of wet recovery of lead-containing raw materials, can solve the problems of lack of impurity removal process, etc., and achieve the effects of controllable particle size, high lead content and controllable shape

Active Publication Date: 2018-01-30
北京中金瑞丰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no impurity removal process in this process route, and the impurities in the lead paste will remain in the product lead oxide, so only lead-calcium alloy scrap batteries with less impurities can be used as raw materials, and the resulting product lead oxide has a purity of only 98-99%, which can only Used as a negative electrode raw material, it has great limitations

Method used

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  • Lead-containing raw material wet recovery treatment method

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Experimental program
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Effect test

Embodiment 1

[0077] 1) Configure 50L containing 1.0mol / L ethylenediamine, 0.5mol / L diethylenetriamine, 1.0mol / L aspartic acid, 1.5mol / L sodium sulfate, 1g / L sodium lauryl sulfate, 0.1g / L xylenol orange reaction solution, add 5 kg of thermally decomposed lead plaster at 60°C, use sodium hydroxide to maintain the pH value of the solution between 9.0-9.5, react for 1.5 hours, and filter to obtain a lead-containing reaction solution;

[0078] 2) Add 1 g of sodium silicate to the lead-containing reaction solution obtained in step 1), filter to obtain lead-containing reaction solution B and impurity precipitation;

[0079] 3) Infuse carbon dioxide into the lead-containing reaction solution B obtained in step 2), the ventilation rate is 50L / min, the reaction temperature is controlled between 95-100°C, and sodium hydroxide is used to maintain the pH value of the solution between 8.0-8.5 during this period , the reaction time was 8 hours, filtered and washed to obtain the product lead carbonate an...

Embodiment 2

[0084] 1) Prepare 5L of reaction solution containing 0.8mol / L alanine, 1.2mol / L histidine, 1mol / L ammonium sulfate, 0.01mol / L cobalt sulfate, 1.1mol / L ethanolamine, and add lead paste at 80°C 0.8kg, 105g of 30% hydrogen peroxide, use ammonia water to maintain the pH value of the solution between 8.0-8.5, react for 2.5 hours, filter to obtain the lead-containing reaction solution;

[0085] 2) Add 1 g of ammonium oxalate and 2 g of ammonium phosphate to the lead-containing reaction solution obtained in step 1), filter to obtain lead-containing reaction solution B and impurity precipitation;

[0086] 3) Pass carbon dioxide into the lead-containing reaction solution B obtained in step 2), the ventilation rate is 10L / min, the reaction temperature is controlled between 80-85°C, and ammonia water is used to maintain the pH value of the solution between 7.0-7.5 during the reaction. The time is 4 hours, filtered and washed to obtain the product lead carbonate and sulfur-containing reac...

Embodiment 3

[0092] 1) Prepare 500L of reaction solution containing 0.2mol / L phenylalanine, 1.2mol / L lysine, 2.0mol / L potassium sulfate, 2g / L sodium pyrophosphate, add 100kg of thermally decomposed lead paste at 70°C, Use potassium hydroxide to maintain the pH value of the solution between 8.5-9.0, react for 3.5 hours, and filter to obtain a lead-containing reaction solution;

[0093] 2) Add 15 g of tannic acid and 200 g of potassium phosphate to the lead-containing reaction solution obtained in step 1), filter to obtain lead-containing reaction solution B and impurity precipitation;

[0094]3) Add 1kg of commercially available lead carbonate to the lead-containing reaction solution B obtained in step 2), and pass in carbon dioxide, the ventilation rate is 70L / min, and the reaction temperature is controlled between 70-75°C, during which potassium hydroxide is used to maintain the solution The pH value is between 6.0-6.5, the reaction time is 5 hours, filtered and washed to obtain the produ...

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Abstract

The invention discloses a lead-containing raw material wet recovery treatment method, which comprises: 1) carrying out a reaction on a reaction mother liquor and a lead-containing raw material to obtain a lead-containing reaction liquid, wherein the reaction mother liquor contains a sulfate, a catalyst, a reducing agent and a complexing agent and has a pH value of 6.0-13.0; 2) carrying out a reaction on the lead-containing reaction liquid obtained in the step 1) and a precipitating agent or a solution containing a precipitating agent, and controlling the pH value at 4.5-11.0 to obtain a sulfur-containing reaction liquid and a solid precipitate A; and 3) carrying out a reaction on the all or part of the sulfur-containing reaction liquid and a desulfurization agent or a solution containing adesulfurization agent to obtain a regenerated reaction liquid and a solid precipitate B, wherein the solid precipitate A is one or a plurality of materials selected from lead carbonate, basic lead carbonate, NaPb2(CO3)2OH, lead sulfite and lead sulfate, and the solid precipitate B is one or a plurality of materials selected from calcium sulfate, calcium sulfate dihydrate and barium sulfate.

Description

technical field [0001] The invention belongs to a wet recovery method for lead-containing raw materials, and belongs to a high-efficiency and low-cost method for purifying lead paste into high-purity lead oxide. Background technique [0002] Lead-acid battery is the first rechargeable battery successfully commercialized in the world, and it is also a secondary battery with the longest history and the most complete development history. In 1859, the French physicist Plante proposed and designed the first lead-acid battery. After more than 150 years of development, the lead-acid battery has become the battery product with the highest output and output value in the world, and it is the most widely used battery. A wide range of secondary chemical power sources has also formed a relatively complete industrial production process and regeneration industry. [0003] Although my country's lead-acid battery and recycled lead industry has formed a preliminary scale, it is limited by th...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B13/00
CPCY02P10/20
Inventor 张超任佳楠武占月
Owner 北京中金瑞丰环保科技有限公司
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