Preparation method of Pb-Sb-Cd alloy used for positive plate of battery

A technology of lead, antimony, cadmium, and positive plate, which is applied in the field of metallurgy, can solve the problems of increasing cost and difficulty of antimony, and achieve the effects of improving utilization rate, reducing cost and optimizing performance

Inactive Publication Date: 2010-08-18
TIANNENG BATTERY WUHU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is a certain amount of antimony in the lead-antimony-cadmium alloy used for the positive plate of the battery. If it is difficult to keep the antimony while smelting according to the preparation method of the prior art, it is mainly to be added later, which will inevitably increase the cost.

Method used

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  • Preparation method of Pb-Sb-Cd alloy used for positive plate of battery
  • Preparation method of Pb-Sb-Cd alloy used for positive plate of battery
  • Preparation method of Pb-Sb-Cd alloy used for positive plate of battery

Examples

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Effect test

Embodiment 1

[0025] (1) Heat 30 tons of reduced lead to make it melt, then heat up to 400°C after melting, add 150 kg of sodium hydroxide, and stir for 20 minutes. Sodium hydroxide forms dross with arsenic and tin, and the dross is removed to obtain liquid lead from which arsenic and tin have been removed.

[0026] (2) Lower the temperature of the lead liquid from which arsenic and tin have been removed to 320°C, divide it into 4 batches, add 50 kg of red phosphorus in total (after inspection, the quality of red phosphorus is 1.8 times the mass of copper in reduced lead), red phosphorus and copper form dross Float on the lead liquid, remove the dross, and obtain the lead liquid after copper removal.

[0027] (3) Add 300 kilograms of mother antimony to the lead liquid after copper removal at 420 DEG C, add mother antimony and stir for 30 minutes to obtain the lead liquid after adding antimony;

[0028] (4) The lead liquid after adding antimony is cooled to 400 ℃, then adds 500 kilograms of...

Embodiment 2

[0034] (1) Heat and reduce 30 tons of lead to make it melt, heat up to 500°C after melting, add 180 kg of sodium hydroxide, and stir for 30 minutes. Sodium hydroxide forms dross with arsenic and tin, and the dross is removed to obtain liquid lead from which arsenic and tin have been removed.

[0035] (2) Lower the temperature of the lead liquid from which arsenic and tin have been removed to 320°C, divide it into 4 batches, and add a total of 52 kg of red phosphorus (after inspection, the quality of red phosphorus is three times that of copper in reduced lead), red phosphorus and copper form dross Float on the lead liquid, remove the dross, and obtain the lead liquid after copper removal.

[0036] (3) Add 240 kilograms of mother antimony to the lead liquid after copper removal at 450 DEG C, add mother antimony and stir for 30 minutes to obtain the lead liquid after adding antimony;

[0037] (4) The lead liquid after adding antimony is cooled to 400 ℃, then adds 500 kilograms ...

Embodiment 3

[0043] (1) Heat 30 tons of reduced lead to make it melt, then heat up to 450°C after melting, add 200 kg of sodium hydroxide, and stir for 20 minutes. Sodium hydroxide forms dross with arsenic and tin, and the dross is removed to obtain liquid lead from which arsenic and tin have been removed.

[0044] (2) Lower the temperature of the lead liquid from which arsenic and tin have been removed to 320°C, divide it into 4 batches, and add a total of 55 kg of red phosphorus (after inspection, the quality of red phosphorus is twice the mass of copper in reduced lead), red phosphorus and copper form dross Float on the lead liquid, remove the dross, and obtain the lead liquid after copper removal.

[0045] (3) Add 400 kilograms of mother antimony to the lead liquid after copper removal at 420 DEG C, add mother antimony and stir for 30 minutes to obtain the lead liquid after adding antimony;

[0046] (4) The lead liquid after adding antimony is cooled to 390 ℃, then adds 505 kilograms ...

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Abstract

The invention discloses a preparation method of a Pb-Sb-Cd alloy used for a positive plate of a battery, which takes reducing lead as the raw material and comprises the following steps of (1) heating the raw material of lead to melt the lead, raising the temperature to 400-500 DEG C after the lead is melted, and adding sodium hydroxide to remove arsenic and tin and obtain lead liquid without the arsenic and the tin; (2) cooling the lead liquid without the arsenic and the tin to the temperature of 320-350 DEG C and adding red phosphorus to remove copper and obtain the lead liquid without copper; (3) adding mother antimony into the lead liquid without the copper under the temperature of 420-460 DEG C to obtain the lead liquid with the antimony; and (4) cooling the lead liquid with the antimony to the temperature of 380-400 DEG C, then adding cadmium, stirring uniformly and cooling to obtain the Pb-Sb-Cd alloy. The invention can reduce the alloy preparation cycle which is generally only 9 hours, while the original process needs 15 hours, so the loss of the lead caused by oxidation is reduced, the utilization rate of the lead is increased, and meanwhile, the use amount of fuel oil, coal, electricity and the like is reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a preparation method of a lead-antimony-cadmium alloy. Background technique [0002] The smelting of lead in the prior art, for example, Chinese invention patent application 00127576.3 discloses a non-polluting lead-containing waste regenerated pure lead smelting process, the lead-containing waste is melted, wood chips are added, and the content of antimony, tin and arsenic Add sodium hydroxide, sodium nitrate, caustic soda, sodium nitrate and stir, add red phosphorus according to the analysis of copper content, remove slag after stirring with a mixer to obtain regenerated pure lead. [0003] Chinese invention patent application 200510008645.01 discloses a method for pyroscouring and refining lead from waste storage batteries, which includes the following steps: a. melting lead waste; Ten to one tenth of the waste battery, stir, and at the same time add sodium hydroxide or so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02
Inventor 张天任娄可柏张开红韩峰
Owner TIANNENG BATTERY WUHU
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