Comprehensive utilization technology for titanium dioxide by-product ferrous sulfate

Abstract

A disclosed comprehensive utilization technology for a titanium dioxide by-product ferrous sulfate comprises the following steps: (1) sending ferrous sulfate heptahydrate to a ferrous-sulfate-heptahydrate charging belt machine by using a forklift, and crushing ferrous sulfate heptahydrate large particles by using a beating machine arranged at the outlet of the ferrous-sulfate-heptahydrate charging belt machine; (2) performing ore blending on pyrite, drying, sieving, and sending to a charging vibrator through the belt machine; and (3) sending the crushed ferrous sulfate heptahydrate to the charging vibrator through the belt machine, mixing with sieved pyrite, then sending to a fluidized bed boiler for roasting, and controlling the blending combustion amount of ferrous sulfate heptahydrate to be 30%-40%. The technology is mature and reliable in operation, high in operation efficiency and low in operation cost, helps to improve the usage amount of ferrous sulfate heptahydrate, and fully utilizes S and Fe resources in ferrous sulfate heptahydrate, wherein S and Fe resources play important roles. Also the technology establishes a base for the solution problem of waste slag in titanium dioxide industries, and has relatively good economic benefit and social benefit.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide production, in particular to a process for comprehensive utilization of green vitriol, a by-product of titanium dioxide. Background technique [0002] Titanium dioxide is an important inorganic chemical raw material. It is non-toxic and harmless to health. It is the most important white pigment, accounting for more than 80% of all white pigments and fillers used. It is also the most important product of titanium series. 90% of the world's titanium resources are used to make titanium dioxide. It is widely used in many fields of modern industry, agriculture, national defense, science and technology, and has a close relationship with people's life and national economy. Contact is the third largest inorganic chemical after synthetic ammonia and phosphorus chemical industry. Many developed industrial countries have included it in the ranks of key chemicals. In some countries and regions, its c...

AI Technical Summary

Problems solved by technology

At present, many domestic titanium dioxide sulfate enterprises are researching the use of ferrous sulfate heptahydrate in pyrite acid production equipment, but there is no major breakthrough, and there is no innovation and expansion in technology. Many manufacturers use sulfuric acid heptahydrate Ferrous iron is converted into ferrous sulfate monohydrate and then mixed with pyrite

Converting ferrous heptahydrate into ferrous monohydrate consumes a lot of energy. Although part of ferrous heptahydrate is digested, the cost is high and uneconomical

Ferrous sulfate heptahydrate entering the fluidized fluidized furnace needs to go through a very complicated process of drying and dehydration, transshipment, overturning ore blending, and natural air drying, which greatly increases energy consumption and labor costs.

Moreover, the amount of mixed combustion is very small, and the operation is not smooth, which affects the stable production of the sulfuric acid system and cannot adapt to large-scale industrial production.

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