Arsenic trioxide purification system and arsenic trioxide purification method

Abstract

The invention relates to an arsenic trioxide purification system, which comprises a purification furnace, two operation chambers, two material carrying boxes with openings in the tops and two feedingmechanisms, the two ends of the purification furnace are each provided with a first opening, and the two operation chambers are symmetrically distributed at the two ends of the purification furnace; wherein one material carrying box is arranged in the operation chamber, the other material carrying box is arranged in the purification furnace, one ends of the two material carrying boxes are connected through a connecting piece, the other ends of the two material carrying boxes are respectively connected with a cable, and winding mechanisms are respectively arranged in the two operation chambers;a second opening opposite to the first opening is formed in the side wall, close to the purification furnace, of the operation chamber, a bearing table is arranged in the purification furnace, and acooling bed as high as the bearing table is arranged in the operation chamber; and the two feeding mechanisms are symmetrically arranged at the two ends of the purification furnace. The arsenic trioxide purification system is compact in structure and high in treatment efficiency, and the uninterrupted purification effect of the purification furnace can be achieved; and direct water spraying cooling is not needed, the smoke generation amount is greatly reduced, and energy conservation and environmental protection are achieved.

Description

technical field [0001] The invention relates to an arsenic trioxide purification system and a purification method, in particular to a box-type arsenic trioxide purification system and a purification method, belonging to the field of smelting equipment. Background technique [0002] Arsenic is a non-metallic element that forms arsenic trioxide (commonly known as arsenic) after passing through high temperatures. [0003] Arsenic has a wide range of uses and is often used as a formula raw material for pesticide preparations, wood preservatives, feed additives, and Chinese and Western medicine preparations. Arsenic trioxide can be smelted into metal arsenic as the main material, which is used in semiconductor electronic software, cemented carbide, and military enterprises. Therefore, the desire to eliminate and outlaw local arsenic refining has not been realized for a long time. The National Development and Reform Commission, the Ministry of Environmental Protection, the Minis...

AI Technical Summary

Problems solved by technology

Unable to produce normally. Frequent failures, unstable product quality, sharp increase in production costs, high labor intensity, and ineffective control of environmental pollution. It is difficult for workers directly involved in production to continue to work for a long time. The main reason for the failure of normal production after improvement is the following

[0006] 1. The physical and chemical properties of arsenic trioxide in high, medium and low temperature periods have not been fully grasped, and the control conditions of the purification process of arsenic trioxide have not been scientifically grasped

[0007] 2. Relevant process designers lack practical work experience in front-line production, and cannot understand the pain points and difficulties of actual production

[0008] 3. Lack of control technology for excessive harmful elements in products

[0009] 4. Lack of practical experience in arsenic collection, arsenic production, arsenic smelting and arsenic prevention

Adhesion to the inner wall of the chain bucket does not remove the shell, and the residue cannot be poured out after being out of the furnace, so it cannot be produced in a continuous cycle

[0017] 2. After the slag is discharged from the furnace, it needs to be cooled with water immediately, resulting in huge toxic smoke and arsenic haze, which seriously damages the environment

[0018] 3. The space between the chain hoppers is large, and the gap between the furnace head and the furnace tail is too large to be sealed, and the leakage pollution will greatly affect the operating environment pollution

[0019] 4. Due to the poor sealing performance, it is necessary to increase the strength of the negative pressure exhaust fan during production, so that part of the dust inside and outside the furnace will be sucked into the product, causing harmful substances to exceed the standard

[0020] 5. The chain belt bucket is loaded with raw materials, the load capacity is high, continuous operation at high temperature, the steel material softens quickly, is not durable, and broken chains often occur

[0021] 6. Once the electric furnace wire and some high-temperature facilities fail, they cannot be replaced immediately

[0036] 1. The raw material for the purification of arsenic trioxide comes from smelting dust, which contains other metals and non-metals besides arsenic, and is corrosive to a certain extent. Strip wear and tear

At the same time, under the action of high temperature, the material melts and forms a molten state, which easily flows out of the steel strip and penetrates into the refractory plate to cause a short circuit of the furnace bottom resistance wire

It is very difficult to replace the electric furnace wire. It must be replaced after the furnace cools down.

[0037] 2. High energy consumption, only 60% of the heat generated in the furnace is used, and the remaining 40% is wasted

[0038] 3. Severe pollution cannot be solved at all

In fact, the energy saving and product quality of arsenic trioxide are directly related to the air volume and wind speed. If the wind is large, it is obvious that a large amount of cold air will be brought into the furnace to reduce the temperature and consume energy. If the wind is large, a large amount of dust in the furnace will be sucked into the product. , resulting in unqualified product quality and purity, and harmful elements exceeding the standard

The draft is strong, and the wind speed will affect the crystallization time of the product, resulting in the crystallization of the product, the particles are not good, and it is difficult to meet the national quality requirements

[0039] In summary, the above two technologies have serious hidden dangers, and it is difficult to meet the requirements of industrialized production, energy saving, emission reduction and environmental protection.

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