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Method for reducing lead dross generated in lead furnace

A lead slag and lead furnace technology is applied in the field of lead-acid battery processing, which can solve the problems of production waste, increase production cost, difficult separation of scum and lead liquid, etc. effect

Inactive Publication Date: 2016-12-14
ANHUI ZHONGNENG POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the configuration process of lead-calcium alloy, in order to protect calcium, a small amount of aluminum is often added to the alloy. Since the specific gravity of aluminum is much smaller than that of lead, and its solubility in liquid lead is small, aluminum tends to be more inclined to Floating to the surface of lead liquid, reacting with oxygen at high temperature, will also produce a large amount of scum
The scum of alumina and calcium oxide formed at high temperature has a large specific surface area, and usually absorbs a lot of liquid lead, making it difficult to separate the scum from the liquid lead, and take away a large amount of liquid metal during the process of removing the scum Lead, causing a lot of waste in production and increasing production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for reducing the lead slag produced in the lead furnace. There is molten lead-calcium alloy in the lead pot, and the carbon black mixture is covered on the surface of the lead-calcium alloy liquid to isolate the lead liquid from the air and slow down the degree of oxidation reaction of the lead-calcium alloy, thereby The purpose of reducing lead slag is achieved.

[0017] The above carbon black mixture is prepared from the following components in parts by weight: 4 parts of organic wood saw foam, 1 part of carbon black, and 0.25 parts of sodium hydroxide.

[0018] The preparation method of above-mentioned carbon black mixture is as follows:

[0019] (1) Put the organic wood sawdust in stainless steel trays, then arrange them neatly in a drying room, control the temperature at 80°C, and dry for 15 hours;

[0020] The drying room is a closed space equipped with a temperature control system and a hot air circulation system. There is a dehumidification fan on the ...

Embodiment 2

[0025] A method for reducing the lead slag produced in the lead furnace. There is molten lead-calcium alloy in the lead pot, and the carbon black mixture is covered on the surface of the lead-calcium alloy liquid to isolate the lead liquid from the air and slow down the degree of oxidation reaction of the lead-calcium alloy, thereby The purpose of reducing lead slag is achieved.

[0026] The above carbon black mixture is prepared from the following components in parts by weight: 4 parts of organic wood saw foam, 1 part of carbon black, and 0.5 parts of sodium hydroxide.

[0027] The preparation method of above-mentioned carbon black mixture is as follows:

[0028] (1) Put organic wood sawdust in stainless steel trays, then arrange them neatly and put them in a drying room, control the temperature at 80°C, and dry for 20 hours;

[0029] The drying room is a closed space equipped with a temperature control system and a hot air circulation system. There is a dehumidification fan...

Embodiment 3

[0034] A method for reducing the lead slag produced in the lead furnace. There is molten lead-calcium alloy in the lead pot, and the carbon black mixture is covered on the surface of the lead-calcium alloy liquid to isolate the lead liquid from the air and slow down the degree of oxidation reaction of the lead-calcium alloy, thereby The purpose of reducing lead slag is achieved.

[0035] The above carbon black mixture is prepared from the following components in parts by weight: 4 parts of organic wood saw foam, 1 part of carbon black, and 0.35 parts of sodium hydroxide.

[0036] The preparation method of above-mentioned carbon black mixture is as follows:

[0037] (1) Put the organic wood sawdust in stainless steel trays, then arrange them in a drying room, control the temperature at 80°C, and dry for 17 hours;

[0038] The drying room is a closed space equipped with a temperature control system and a hot air circulation system. There is a dehumidification fan on the rear si...

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PUM

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Abstract

The invention provides a method for reducing lead dross generated in a lead furnace and belongs to the technical field of lead-acid storage batteries. According to the method for reducing the lead dross generated in the lead furnace, organic wooden saw dust is dried, braked, smashed and then screened with a 150-mesh screen, the screened organic wooden saw dust is mixed with 20%-30% of carbon black, the mixture is spread on the surface of the lead furnace, so that molten lead in the lead furnace is isolated from air, and calcium in lead alloy is prevented from performing an oxidization reaction with oxygen in air; and hence, the purpose of reducing the lead dross is achieved.

Description

technical field [0001] The invention relates to the technical field of lead-acid battery processing, in particular to a method for reducing lead slag generated in a lead furnace. Background technique [0002] According to the requirements of the national environmental protection policy, by the end of December 2014, the use of lead-antimony-cadmium alloys is prohibited on the positive grid of electric vehicle batteries, and lead-calcium alloys must be used. Calcium is a very active metal. During the grid manufacturing process, calcium reacts with oxygen at high temperature to produce a large amount of scum. In addition, in the configuration process of lead-calcium alloy, in order to protect calcium, a small amount of aluminum is often added to the alloy. Since the specific gravity of aluminum is much smaller than that of lead, and its solubility in liquid lead is small, aluminum tends to be more inclined to Because it floats to the surface of the lead liquid, and reacts with...

Claims

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Application Information

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IPC IPC(8): C22B13/02
CPCC22B13/02
Inventor 韩雪明梅生猛卓考建汶东全李超雄
Owner ANHUI ZHONGNENG POWER SUPPLY CO LTD