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Particulate ferrous sulfate heptahydrate and its preparing method and device

A technology of ferrous sulfite heptahydrate and ferrous sulfate, which is applied in the direction of ferric sulfate, can solve the problems of easy agglomeration and oxidation of ferrous sulfate heptahydrate, packaging, storage and transportation, and inconvenient use, and achieve equipment design or selection Easy to model, convenient to pack and store, no three wastes to pollute

Inactive Publication Date: 2007-08-08
梁永洪 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a granular heptahydrate that can overcome the shortcomings of existing ferrous sulfate heptahydrate, such as easy agglomeration and oxidation, packaging, storage and transportation, and inconvenient use, and can stabilize the content of active ingredient iron in the product. Ferrous sulfate and production method and equipment

Method used

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  • Particulate ferrous sulfate heptahydrate and its preparing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Wash ferric sulfite heptahydrate, a by-product of the titanium dioxide factory, with clear water to remove surface impurities. The ratio of ferric sulfite heptahydrate to clear water is 5-30 kg of water per 100 kg of ferric sulfite heptahydrate. After stirring, place 10- After 20 minutes, remove the floating matter floating on the top, drain the impurities deposited at the bottom, then filter and drain the water to obtain pure ferric sulfite heptahydrate. Part of the ferric sulfite heptahydrate can be recovered by concentrating the filtered water. The above-mentioned cleaned iron sulfite heptahydrate is placed in a boiler hot flue gas drier for indirect heating; the obtained iron content is 17-25% (weight content) and free water-free iron sulfite heptahydrate. Then immediately put it into a tablet machine to press the above-mentioned ferrous sulfite heptahydrate without free water into a sheet with a thickness of 2-10mm, then crush it into granular ferrous sulfate hepta...

Embodiment 2

[0030] The iron sulfite heptahydrate, a by-product of the titanium dioxide factory, is first washed to remove surface impurities with clear water. The ratio of ferric sulfite heptahydrate and clear water is to add 5-30 kg of water per 100 kg of ferric sulfite heptahydrate, and stir for 5-10 minutes. Set it aside for 10-20 minutes, remove the floating matter floating on the top, drain the silt and impurities with a large specific gravity deposited at the bottom, then filter and drain the water to obtain pure ferric sulfite heptahydrate. Part of the ferric sulfite heptahydrate can be recovered by concentrating the filtered water. Put the cleaned ferric sulfite heptahydrate into an airflow drier to dry to obtain ferric sulfite heptahydrate with an iron content of 17-25% (weight content) and no free water. Then immediately press the above-mentioned ferrous sulfite heptahydrate without free water into a sheet with a thickness of 2-10mm with a tablet machine, then crush it into gran...

Embodiment 3

[0032]The iron and steel plant by-product ferric sulfite heptahydrate is first washed with clean water to remove surface impurities, the ratio of ferric sulfite heptahydrate and clear water is 20-30 kg of water per 100 kg of ferric sulfite heptahydrate, and after stirring for 5-10 minutes, clean Place for 10-20 minutes, remove the floating matter floating on the top, drain the silt deposited at the bottom and the impurities with larger specific gravity, then filter, and drain the water to obtain an iron content of 17-25% (weight content) Pure ferric sulfite heptahydrate. Part of the ferric sulfite heptahydrate can be recovered by concentrating the filtered water. The above-mentioned cleaned iron sulfite heptahydrate is placed in a microwave oven and heated by microwave for 3-10 minutes to obtain the iron sulfite heptahydrate without free water. Then press the above-mentioned ferrous sulfite heptahydrate without free water into a sheet with a thickness of 2-10mm with a tablet ...

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Abstract

The invention discloses a blue green or light blue particle-shaped ferrous sulphate heptahydrate and manufacturing method and equipment with diameter at 1-8mm, which comprises the following steps: washing ferrous sulphate heptahydrate in the cleaning pond to remove surface impurity; filtering; drying; obtaining pure ferrous sulphate heptahydrate; drying; punching to obtain the piece with thickness at 2-10mm; breaking; separating through vibrating sieve; collecting 2-60 order particle; packing; blending dried piece and ferrous sulphate heptahydrate to punch again.

Description

technical field [0001] The invention relates to a ferrous sulfate heptahydrate product and a production method thereof, in particular to granular ferrous sulfate heptahydrate produced by using ferrous sulfate, a by-product of a titanium dioxide factory or a steel plant, as a raw material, and a production method and equipment thereof. Background technique [0002] Ferrous sulfate heptahydrate, the molecular formula is FeSO 4 .7H 2 O, blue-green monoclinic crystal, corrosive, easy to oxidize and agglomerate in humid air. Mainly used in pigments, dyes, industrial water treatment and chemical reagents, feed additives, trace element fertilizers and other fields. At present, the production of ferrous sulfate heptahydrate is mainly produced by scrap iron and sulfuric acid; iron and steel plant pickling also produces ferrous sulfate as a by-product; in enterprises producing titanium dioxide by sulfuric acid method, because ilmenite ore needs to be reacted with sulfuric acid, a lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/14
Inventor 梁永洪龙庆国
Owner 梁永洪
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