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Sulfuric acid and fine iron powder co-production method using iron vitriol

A technology of ferrous sulfate and fine iron powder, which is applied in the field of comprehensive utilization of solid waste materials, can solve the problems of blocking the feeding port of fluidized fluidized furnace, low melting point of ferrous sulfate, and affecting normal production, etc., so as to improve utilization efficiency, facilitate operation, reduce The effect of environmental pollution

Inactive Publication Date: 2012-02-08
HUNAN HENGGUANG TECH
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

This method of ginseng has two disadvantages. One is that the ratio cannot be changed after mixing, and once the sulfur content of pyrite changes, the temperature of the boiling furnace can only go with the flow and is difficult to adjust; the other is that the melting point of ferrous sulfate is low, and the temperature When it is high, it is easy to agglomerate with pyrite, and block the feeding port of fluidized fluidized furnace, affecting normal production

Method used

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Embodiment 1

[0021] Ferrous sulfate heptahydrate is heated to 80-90°C with steam in an enamel pot, decomposed into ferrous sulfate monohydrate and six waters, and the decomposed water is used to make ferrous sulfate monohydrate slurry, and the slurry pump is used Injected into the fluidized furnace, under the high temperature condition of 850-900℃, ferrous sulfate in water decomposes into sulfur dioxide; ferric oxide or triferrous oxide; oxygen and water vapor.

[0022] The specific process is as follows:

[0023] Feed ferrous sulfate heptahydrate into the enamel reaction pot, pass steam to the jacket of the enamel reaction pot to heat the ferrous sulfate heptahydrate. After melting, start stirring. While heating while stirring, continue to add ferrous sulfate heptahydrate to control the temperature in the pot. The temperature is 80-90°C to decompose ferrous sulfate heptahydrate into ferrous sulfate monohydrate slurry; pump the ferrous sulfate monohydrate slurry into the pyrite roasting fl...

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PUM

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Abstract

A sulfuric acid and fine iron powder co-production method using iron vitriol. A raw material of iron vitriol which is a by-product from a sulfuric acid process for producing a titanium pigment is heated by steam and dehydrated into monohydrate ferrous sulfate slurry; the slurry is injected a pyrites fluidizing roaster; monohydrate ferrous sulfate is decomposed into sulfur dioxide gas and ferric oxide or ferriferrous oxide under high temperature; the sulfur dioxide gas is used in sulfuric acid production, and the ferric oxide or ferriferrous oxide is high-quality fine iron powder. The technology of the invention is simple and convenient for operation; a temperature of the roaster and an addition of the monohydrate ferrous sulfate can be effectively adjusted to overcome an abuse of caking pyrite and solve a utilization problem of iron vitriol, a by-product from a sulfuric acid process for producing a titanium pigment, so as to efficiently increase resource utilization efficiency and reduce environmental pollution; therefore, the method is suitable for industrialized production.

Description

technical field [0001] The invention discloses a process for co-producing sulfuric acid and iron fine powder by adopting ferrous sulfate heptahydrate; the by-product ferrous sulfate heptahydrate in the production process of sulfuric acid titanium dioxide is prepared into ferrous sulfate monohydrate slurry and sprayed into pyrite The roasting fluidized furnace decomposes to prepare sulfuric acid and iron fine powder, which belongs to the technical field of comprehensive utilization of solid waste materials. Background technique [0002] Ferrous sulfate heptahydrate is a by-product of the sulfuric acid method titanium dioxide production process, producing one ton of titanium dioxide pays 3.5 tons of ferrous sulfate heptahydrate (FeSO 4 ·7H 2 O). Ferrous sulfate can generally be used to produce iron red iron black and polyferric sulfate, and polyferric sulfate is used in water purifiers. However, the above industries can only digest a small part of ferrous sulfate, and most ...

Claims

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Application Information

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IPC IPC(8): C01B17/74C22B1/02
Inventor 曹立祥
Owner HUNAN HENGGUANG TECH
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