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Preparation method of lead oxide

A technology of lead oxide and carbon dioxide, applied in the direction of lead oxide, lead red, lead carbonate, etc., can solve the problems of long process flow, poor economy, high energy consumption, etc., and achieve the effect of simple process, low cost and high efficiency

Pending Publication Date: 2021-03-26
HANGZHOU QIANLIZHIXING TECH CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

The disadvantage of this method is that the waste lead paste needs to be smelted at high temperature to make crude lead, the crude lead is refined into refined lead, and the refined lead is cold cut into balls and then ball milled to prepare α-lead oxide lead powder, and then the paste is mixed, and the temperature is raised during the paste mixing process Add red lead and sulfuric acid to generate β-lead oxide at the same time, the whole process consumes a lot of energy, lead fume, lead dust, and sulfur dioxide exhaust pollution are serious, and the process is long and economical.

Method used

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  • Preparation method of lead oxide

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with specific drawings.

[0016] Such as figure 1 As shown, the lead-acid battery cathode material preparation device of the present invention includes a roasting device 1, a heat exchanger 2, a gas purification device 3, a tail gas treatment product conversion device 4, a first solid-liquid separation device 5, a gypsum generating device 6, a second solid Liquid separation device 7, purification device 6a, lead carbonate preparation device 6b, purification solid-liquid separation device 7a, lead carbonate solid-liquid separation device 7b. Roasting device 1 comprises tail gas outlet 8, and tail gas outlet 8 communicates with the inlet 9 of heat exchanger 2, and the exhaust port 10 of heat exchanger 2 communicates with the inlet 11 of gas purification device 3 (3a), and gas purification device 3(3a) The exhaust port 12 is communicated with the feed port 14 of the tail gas treatment product conversion ...

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Abstract

The invention relates to a preparation method of lead oxide, and the method is characterized by comprising the following steps of: 1. desulfurizing waste lead plaster, and carrying out solid-liquid separation to obtain a lead carbonate-containing cured product; and 2, carrying out high-temperature smelting on the lead carbonate-containing cured product to obtain lead oxide and waste gas, inputtingthe waste gas into an ammonia water device to produce a sulfur removal agent containing ammonium carbonate, and using the sulfur removal agent containing ammonium carbonate to desulfurize the waste lead plaster in the step 1. The preparation method of lead oxide is simple in process, high in efficiency and low in cost.

Description

technical field [0001] The invention relates to the field of lead-acid batteries. Background technique [0002] At present, in the preparation method of the positive electrode material of the lead-acid battery, red lead, sulfuric acid and other substances are usually added to the lead oxide to form a paste. At present, the manufacture of the lead oxide is to prepare the refined lead through the waste lead paste first fire method, and then cold cut into balls and Prepare α-lead oxide powder by ball milling, and then make lead paste. This preparation method needs to first smelt the waste lead paste containing lead sulfate at high temperature to prepare crude lead. Since the melting point of lead sulfate is 1087°C, the smelting temperature needs to reach above 1100°C, and then the crude lead is prepared into refined lead, and then oxidized in a ball mill. Lead, ball milling power consumption 300kwh / t lead oxide, and finally lead oxide into the paste machine, and at the same ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/02C01G21/10C01F11/46H01M4/56H01M10/54H01M10/06B82Y40/00
CPCC01G21/14C01P2006/80Y02P70/50
Inventor 丁建华
Owner HANGZHOU QIANLIZHIXING TECH CO LTD
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