Lead tetraoxide oxidation technology

Abstract

The invention relates to a lead tetraoxide oxidation technology which comprises the following steps: 1) preheating air; 2) blowing the preheated air into an oxidizing furnace; 3) performing three-section temperature control on the oxidizing furnace, wherein the temperature of the oxidizing furnace from top to bottom is divided into the first section of temperature controlled at 450-510 DEG C, the second section of temperature controlled at 420-460 DEG C and the third section of temperature controlled at 380-420 DEG C; 4) putting the material into the oxidizing furnace from top to bottom and performing oxidizing reaction; 5) storing the oxidized material after fully reacting in a hearth of the oxidizing furnace into a storage silo and cooling; 6) reducing the temperature of the oxidized material in the storage silo to 60 DEG C or below and then taking out from the storage silo. According to the invention, the purpose of quickly preparing red lead can be achieved, the yield is increased, the resource is saved, the cost is saved and the production efficiency is increased.

Description

technical field [0001] The invention relates to the field of red lead production, in particular to an oxidation process of trilead tetroxide. Background technique [0002] Trilead tetroxide is a chemically stable lead salt, commonly known as red lead, is an important red pigment, widely used in paint industry, also used in battery industry, glass industry, ceramic net, mirror industry, etc. [0003] At present, the industrial production method of red lead at home and abroad is mainly to heat and melt the electrolytic lead, then pulverize it by ball milling, and then naturally roast and oxidize it 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 must go through the stages of roasting and calcination. Disadvantages of the traditional method: due to the high temperature in the roasting chamber a...

AI Technical Summary

Problems solved by technology

Disadvantages of the traditional method: due to the high temperature in the roasting chamber and the oxidation chamber, there is insufficient oxygen, which cannot meet the oxidation demand of the lead material. Only by prolonging the oxidation time can the red lead product be obtained. The energy consumption is too large, the production cost is high, and the production efficiency is high. Low

[0004] At present, the oxidation technology of PbO4 is roasted by diesel sintering bed to further oxidize the semi-finished products to produce the required products. During the combustion process of diesel oil, it needs to absorb the oxygen in the hot air, resulting in the reduction of the oxygen content in the hot air. , thereby reducing the oxygen content required for the oxidation reaction, resulting in a reduction in the oxidation reaction efficiency of the material; in order to speed up the oxidation reaction, most of them need to add an appropriate amount of ammonium nitrate as a catalyst in the oxidation furnace, and the cost is not considered, ammonium nitrate is dangerous Chemicals, in the presence of high temperature, high pressure and oxidizable substances, will explode. At the same time, it is also a raw material for preparing explosives. There are potential safety hazards in the process of transportation, storage and use. Therefore, the traditional red lead production process There are major security risks

Some of the prior art achieve the purpose of rapid preparation of red lead through intelligent oxygen supply, but there are problems of increasing the production process or low yield