Method for rapidly preparing red lead by using intelligent oxygen supply device

Abstract

The invention discloses a method of quickly preparing red lead by utilizing an intelligent oxygen supply device. The method comprises the following the steps: preparing red lead (lead tetroxide) by the intelligent oxygen supply device; compressing and storing pure oxygen gas prepared by oxygen preparation equipment in the intelligent oxygen supply device; adding air for diluting; controlling oxygen content to 35%-40% at a normal temperature under normal pressure by intelligent oxygen measuring equipment, wherein the intelligent oxygen measuring equipment intelligently switches on or switches off an air adding switch when the oxygen content is lower than or higher than 35%-40%; storing the diluted oxygen gas in a gas storage tank; heating the gas storage tank by a solar heating device or an electric heating device; controlling a temperature to 200 DEG C; and injecting the oxygen gas to a roasting bin and an oxidizing bin at a speed of 10L / m by an air feeder and an air guide tube. The device and the method disclosed by the invention can shorten oxidizing time, increase yield, save energy resource, lower consumption, save production cost and improve production efficiency.

Description

Technical field [0001] The invention relates to the technical field of preparing red lead, in particular to a method for rapidly preparing red lead (trilead tetroxide) by using an intelligent oxygen supply device. Background technique [0002] The chemical reaction equation for preparing red lead product (trilead tetroxide): [0003] ①, [0004] ②、 [0005] According to the law of conservation of mass, 1 ton of electrolytic lead roasting and oxidation can generate 1.07729 tons of PbO, and then after calcining and oxidation, 1.10305 tons of Pb can be generated 3 O 4 , Namely Hongdan products. The 0.10305 ton overflow is the oxygen mass required for complete oxidation of the lead material. As we all know, under normal temperature and pressure, oxygen accounts for 21% of the air, and the oxygen density is 1.429g / L. Each cubic meter of air contains only 0.0003 tons of oxygen under normal temperature and pressure. However, under high temperature conditions, oxygen is thinner and far C...

AI Technical Summary

Problems solved by technology

As we all know, under normal temperature and pressure, the ratio of oxygen to air is 21%, and the density of oxygen is 1.429g / L. Under normal temperature and pressure, each cubic meter of air contains only 0.0003 tons of oxygen. It cannot meet the oxidation needs of lead materials, but can only produce red lead products by prolonging the oxidation time

[0006] At present, the industrial production method of red lead at home and abroad is mainly to heat and melt the electrolytic lead, then ball mill and pulverize it, and then undergo natural roasting and oxidation at a temperature of 300°C to generate PbO, and then undergo natural oxidation at a high temperature of 500°C to obtain Pb 3 o 4 That is, red lead products, even if the most advanced "dry and wet new process" produces red lead, it will go through the roasting and calcination stages. The disadvantages of the traditional method: due to the high temperature in the roasting chamber and oxidation chamber, the lack of oxygen cannot meet the requirements of lead. The oxidation demand of raw materials can only be obtained by prolonging the oxidation time to obtain red lead products. The energy consumption is too large, the production cost is high, and the production efficiency is low.