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Lead sulfate waste desulfurization device and lead sulfate waste desulfurization process

A desulfurization device and lead sulfate technology, applied in the direction of lead carbonate, calcium/strontium/barium sulfate, etc., can solve the problems of increasing costs, affecting economic benefits, and difficult sales, so as to reduce consumption, improve gypsum quality, reduce deposition or Fouling effect

Pending Publication Date: 2020-05-19
湖南省金翼有色金属综合回收有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the biggest defect of this process is that it needs to consume about 0.5 tons of soda ash (based on the removal of 150 kilograms) to produce one ton of lead metal, and produce about 1.5 tons of sodium sulfate decahydrate which is cheap and difficult to sell
Calculated according to the current price of soda ash, the cost of producing one ton of crude lead is at least 1,000 yuan more than the sintering roasting-blast furnace smelting-tail gas desulfurization process, which greatly affects the economic benefits of the factory

Method used

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  • Lead sulfate waste desulfurization device and lead sulfate waste desulfurization process
  • Lead sulfate waste desulfurization device and lead sulfate waste desulfurization process

Examples

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Effect test

Embodiment 1

[0050] Such as Figure 1-2 Described, a kind of lead sulfate waste desulfurization equipment comprises desulfurization tank 3, conversion tank 12, carbonization tank 16, filter, pump 6, liquid storage tank 18 and delivery pipe; Desulfurization tank 3, conversion tank 12 and carbonization tank 16 Stirring device 4, acid-base thermometer 5 and heater are arranged inside the tank, and the heater is arranged on the stirring device 4 or the inner wall of the tank; Remove the sealing cover, and the observation hole is provided with a sealed transparent cover; the side wall of the tank body is equipped with an acid-base thermometer 5 for detecting the temperature and pH of the solution in the tank body; the lower part of the tank body is equipped with a discharge port, and the desulfurization tank is observed Hole 2 is used to observe the reaction of the solution in the tank.

[0051] The filter includes a first filter 10 and a second filter 13, the upper part of the filter is provi...

Embodiment 2

[0069] The above-mentioned lead sulfate waste desulfurization equipment is used for lead sulfate waste desulfurization treatment, and a commercially available valve-regulated sealed lead-acid battery with a specification of 12V and 55Ah is crushed and separated to obtain lead paste and waste sulfuric acid solution. According to the traditional chemical titration analysis of the lead paste, the lead-containing components and contents thereof are 9.6% of Pb, 14.5% of PbO, 34.8% of PbO2 and 38.7% of PbSO4. Then 1 kg of lead plaster is subjected to desulfurization reaction, including the processing process:

[0070] Add the lead sulfate waste and 0.6M sodium carbonate aqueous solution into the desulfurization tank 3 at a solid-to-liquid ratio of 3:1, heat to 70°C, and stir for 1.5 hours; after the reaction is completed, the pH value of the solution in the conversion tank 12 is controlled In 7-7.5, the solution is pumped into the membrane filter press for liquid-solid separation, a...

Embodiment 3

[0075] Adopt the lead sulfate waste desulfurization equipment in embodiment 1 to carry out the lead sulfate waste desulfurization treatment, take the by-product washed down during the acid leaching process in the positive plate manufacturing stage of a certain lead-acid battery production company in Hunan, and obtain the lead-containing components and content therein through analysis They are: Pb content 9.5%, PbO content 17.2%, PbSO4 content 32.4% and moisture content 37.3%. The desulfurization reaction is carried out by the positive pole leaching acid by-product, and the treatment process is as follows:

[0076] Add the lead sulfate waste and 0.5M sodium carbonate aqueous solution into the desulfurization tank 3 at a solid-to-liquid ratio of 3:1, heat to 75°C, and stir for 1.5 hours; after the reaction is completed, the pH value of the solution in the conversion tank 12 is controlled In 7-7.5, the solution is pumped into the membrane filter press for liquid-solid separation,...

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Abstract

The invention provides a lead sulfate waste desulfurization device and a lead sulfate waste desulfurization process thereof. The device comprises a desulfurization tank, a conversion tank, a carbonization tank, filters, a pump, a liquid storage groove and conveying pipes, wherein the desulfurization tank is connected with a first filter through a conveying pipe, a solution obtained after solid-liquid separation is conveyed into the conversion tank through a conveying pipe, the conversion tank is connected with a second filter through a conveying pipe, a solution obtained after solid-liquid separation is conveyed into the carbonization tank, and the molten liquid in the carbonization tank is pumped into the liquid storage groove through a pump and is to be transferred into the desulfurization tank so as to be recycled. According to the invention, solutions in a desulfurization tank, a conversion tank and a carbonization tank are circularly arranged, so that the reaction efficiency is effectively improved while the conveying pipe of the tank body is blocked due to slurry precipitation or scaling in the tank body is effectively reduced; and a carbonizing agent and organic phenolic substances are regenerated and recycled, so that the desulfurization cost is greatly reduced, the environmental pollution is effectively reduced, the production efficiency is effectively improved, and the desulfurization purpose is thoroughly achieved.

Description

technical field [0001] The invention relates to waste lead-acid battery recycling technology, in particular to a lead sulfate waste desulfurization device and its technology. Background technique [0002] A dismantling and recovery system for waste lead-acid batteries and a recovery and recovery system for hazardous lead waste have been built. The recovery and recovery system mainly deals with the lead paste produced by the dismantling system and the lead sludge and lead soot produced by other non-ferrous refineries. In addition to being rich in many valuable elements such as lead, copper, bismuth, tin, gold, and silver, such materials generally contain sulfur, which presents considerable technical and cost challenges to the processing of such materials. In order to solve this problem, ensure the full recovery efficiency of resources and the good economic benefits of enterprises. [0003] Carbonate conversion desulfurization by-product sodium sulfate-blast furnace reduction...

Claims

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Application Information

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IPC IPC(8): C01F11/46C01G21/14
CPCC01F11/46C01G21/14C01P2006/80
Inventor 成翔陈春华雷高雄
Owner 湖南省金翼有色金属综合回收有限公司
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