Process for preparing sulfuric acid by blending combustion of pyrite concentrate with ferrous sulfate

Abstract

The invention discloses a process for preparing sulfuric acid by blending and burning pyrite concentrate with ferrous sulfate. The process comprises the following steps: S1, preparing preparation equipment; s2, raw material treatment; s3, roasting is carried out; s4, a purification step; s5, carrying out dry suction; s6, carrying out conversion; and S7, preparing a finished product. According to the process for preparing sulfuric acid by blending combustion of pyrite concentrate with ferrous sulfate, the internal diffusion resistance can be reduced and the contact area between air and ore can be increased due to the small particle size of the pyrite concentrate with the particle size of 3mm, the measure is most effective for controlling the total roasting rate through oxygen diffusion, and the total roasting rate can be controlled by increasing the oxygen content of furnace entering gas; the oxygen concentration in the atmosphere is high, external diffusion and internal diffusion cone power of oxygen is large, the diffusion rate of the oxygen is high, the oxygen content in the furnace gas can be increased, catalytic conversion of So2 is facilitated, the process is simple and convenient, the cost is low, and sulfuric acid with high purity can be prepared.

Description

technical field [0001] The invention relates to the field of preparation of sulfuric acid, in particular to a process for preparing sulfuric acid by mixing sulfur-concentrated sand with ferrous sulfate. Background technique [0002] Sulfuric acid is one of the most active binary inorganic strong acids, which can react with most metals. High concentration of sulfuric acid has strong water absorption and can be used as a dehydrating agent to carbonize wood, paper, cotton and linen fabrics and biological skins. The substance of the compound, when mixed with water, will also release a lot of heat energy. It has strong corrosiveness and oxidation, so it should be used with caution. It is an important industrial raw material and can be used for the manufacture of fertilizers, drugs, explosives, pigments, washing It is also widely used in the purification of petroleum, metal smelting and dyes and other industries. It is often used as a chemical reagent, and can be used as a dehydra...

AI Technical Summary

Problems solved by technology

[0002] Sulfuric acid is the most active binary inorganic strong acid, which can react with most metals. High-concentration sulfuric acid has strong water absorption, and can be used as a dehydrating agent to carbonize wood, paper, cotton and linen fabrics, and biological flesh. The substance of the compound, when mixed with water, will also release a lot of heat energy. It is highly corrosive and oxidizing, so it needs to be used with caution. It is an important industrial raw material and can be used to make fertilizers, medicines, explosives, pigments, washing It is also widely used in industries such as purification of petroleum, metal smelting, and dyes. It is often used as a chemical reagent, and can be used as a dehydrating agent and sulfonating agent in organic synthesis. The existing sulfur concentrate sand is mixed with ferrous sulfate to prepare The process of sulfuric acid is cumbersome and costly, and it cannot handle so2 furnace gas well during preparation