Metal arsenic reformer

Abstract

A metal arsenic reformer relates to the field of high-purity arsenic production technique. A heating layer is arranged outside a re-crystallized silicon carbide reforming tube; and one end of the re-crystallized silicon carbide reforming tube is connected with a feeding tube through a flange while the other end thereof is connected with an aluminum storage tank through a re-crystallized silicon carbide connection tube. By taking re-crystallized silicon carbide tubes as the reforming tube and the connector for connecting the aluminum storage tank, the metal arsenic reformer has the characteristics of high purity, corrosion resistance, no chemical reaction with the product in the production process of the high-purity arsenic, long-term use, good heat conduction, and even thermal field, and brings large allowance to the temperature control in the production process; furthermore, as the metal arsenic reformer can be conveniently machined into various required shapes, the equipment accessories can be connected easily, the yield is increased, and the reforming efficiency is improved. As a loader for the product, the aluminum storage tank can effectively prevent the secondary pollution after the reformation due to the good corrosion resistance of the aluminum, and has the advantages of easy machining and low cost.

Description

technical field [0001] The invention relates to the technical field of high-purity arsenic production. Background technique [0002] Various purification methods of metal arsenic have a process of converting metal arsenic into a certain compound, and then using the difference in physical or chemical properties of this compound to separate impurities. In the high-purity arsenic purification process, quartz glass was used as the conversion tube and titanium alloy was used as the product carrier to isolate the air and transport the reaction medium. During this process, the reaction medium and the quartz tube undergo a corrosion reaction above 850 °C, causing the main component of the quartz tube to be SiO 2 The oxygen in the tube is replaced by arsenic, and the quartz tube is quickly corroded out of the hole, causing the medium to leak, and the medium arsenic in it is oxidized, which not only causes the process to fail, but also produces toxic arsenic oxide, which puts pressur...

AI Technical Summary

Problems solved by technology

Due to the corrosion reaction between the reaction medium and the quartz tube above 850°C during this process, the main component of the quartz tube, SiO 2 The oxygen in the tube is replaced by arsenic, and the quartz tube is quickly corroded out of holes, causing the medium to leak, and the arsenic in the medium is oxidized, which not only causes the process to fail, but also produces toxic arsenic oxide, which brings pressure to environmental protection and safe production. increased cost

In addition, there is a slight reaction between the titanium alloy and the converted product, and scarring is formed on the inner wall, which is difficult to clean and causes secondary pollution

It is difficult to make flanges from quartz conversion tubes, and it is also difficult to connect flanges to equipment accessories due to their hardness and brittleness.

These problems are a big problem in the production process

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