New process for removing arsenic by strong oxidization in blast furnace

Abstract

The invention aims to provide a new process for removing arsenic by strong oxidization in a blast furnace, which has simple operation and produces waste slag in accordance with environment-friendly requirements. The invention adopts the technical content that the new process for removing the arsenic by the strong oxidization in the blast furnace is characterized in that the process flow comprisessteps of feeding stibium doped waste, silicon iron calcium and coking coal into the blast furnace from a blast furnace inlet, burning gold in the blast furnace, blowing air into the blast furnace through an air blower, oxidizing the stibium doped waste, smelting the mixture, oxidizing and separating the mixture, treating the mixture in a dust absorption chamber, adding glass clarifying agent intothe mixture, and putting a product into a storage. The process has the specific implementation mode that 10 percent of coking coal fuel is matched during adding the raw materials, the oxidization andtemperature are controlled during charging the materials, and the materials accommodated in the furnace is 0.6 m<2>; the strong oxidization air quantity is 30 m<3> per minute, and the air pressure is29.6 Pascal per square centimeter; and the strong oxidization is carried out at the temperature of 800 DEG C, and the discharged arsenic slag is 0.005 kilogram per 100 kilograms. The process has the advantages of improving the refining purity of nonferrous metals, reducing the content of toxic materials in the waste slag, and having remarkable effect on environmental protection.

Description

technical field [0001] The patent of the present invention relates to the process of smelting non-ferrous metals, specifically a new process for removing arsenic by strong oxidation in a blast furnace. Background technique [0002] At present, the smelting of non-ferrous metals mainly uses more than 10% sodium carbonate and sodium hydroxide to separate them from the reverberatory furnace and arsenic slag to form sodium arsenate. The smelted waste slag contains more than 10% arsenic. The waste water, The exhaust gas cannot meet the national environmental protection standards at all, and this method increases the cost, which is not conducive to environmental protection. The discharged waste residue damages the air and natural plants and animals, and is even more harmful to the health of nearby humans. Contents of the invention [0003] The purpose of the present invention is to provide a new process for removing arsenic by strong oxidation in blast furnaces, which is simple ...

AI Technical Summary

Problems solved by technology

[0002] At present, the smelting of non-ferrous metals mainly uses more than 10% sodium carbonate and sodium hydroxide to separate them from the reverberatory furnace and arsenic slag to form sodium arsenate. The smelted waste slag contains more than 10% arsenic. The waste water, The exhaust gas cannot meet the national environmental protection standards at all, and this method increases the cost, which is not conducive to environmental protection. The discharged waste residue damages the air and natural plants and animals, and is even more harmful to the health of nearby humans.