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Resource utilization method for titanium white by-product ferrous sulphate

A technology of ferrous sulfate and by-products, which is applied in the directions of iron oxide/iron hydroxide, calcium/strontium/barium sulfate, etc., can solve the problems of not being able to make full use of titanium dioxide by-product ferrous sulfate at low cost, and achieve economic benefits. and the effect of significant social benefits, good promotion prospects and low cost

Inactive Publication Date: 2012-02-15
攀枝花市尚亿科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] What the present invention aims to solve is the technical problem that the titanium dioxide by-product ferrous sulfate cannot be fully utilized at low cost in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment one processes titanium dioxide by-product ferrous sulfate with the inventive method

[0033] Purification treatment of titanium dioxide by-product ferrous sulfate: Prepare 100g of titanium dioxide by-product ferrous sulfate, use medium temperature (50-70°C) iron sheet reduction to control hydrolysis for 6-10 hours, flocculate, settle and separate, and refine to obtain ferrous sulfate heptahydrate solution 510g, containing 17% of ferrous sulfate heptahydrate.

[0034] Feed 27.5 L of ammonia gas into the ferrous sulfate solution obtained after the purification treatment, filter after sufficient reaction to obtain 98 g of ferrous hydroxide precipitate and 405 g of ammonium sulfate solution. The ferrous hydroxide precipitate was washed, press-filtered and roasted to obtain 45.3g of product iron concentrate. Iron concentrate contains 68% iron.

[0035] Prepare 38g of quicklime, add 100g of water and stir thoroughly, mix and stir with the above ammonium sulfate s...

Embodiment 2

[0036] Embodiment two processes titanium dioxide by-product ferrous sulfate with the inventive method

[0037] Purification treatment of titanium dioxide by-product ferrous sulfate: Prepare 200g of titanium dioxide by-product ferrous sulfate, use medium temperature (50-70°C) iron sheet reduction to control hydrolysis for 6-10 hours, flocculate, settle and separate, and refine to obtain 980g of ferrous sulfate heptahydrate , containing 17.7% of ferrous sulfate heptahydrate.

[0038] Feed 56L of ammonia into the ferrous sulfate solution obtained after the purification treatment, filter after sufficient reaction to obtain 185g of ferrous hydroxide precipitate and 790g of ammonium sulfate solution. The ferrous hydroxide precipitate was washed, press-filtered, and roasted to obtain 90.5 g of product iron concentrate. Iron concentrate contains 69% iron.

[0039] Prepare 75g of quicklime, add 200g of water and stir thoroughly, mix and stir with 790g of the above-mentioned ammonium ...

Embodiment 3

[0040] Embodiment three processes titanium dioxide by-product ferrous sulfate with the inventive method

[0041]Purification treatment of titanium dioxide by-product ferrous sulfate: Prepare 300g of titanium dioxide by-product ferrous sulfate, use medium temperature (50-70°C) iron sheet reduction to control hydrolysis for 6-10 hours, flocculate, settle and separate, and refine to obtain ferrous sulfate heptahydrate solution 1455g, containing 17.8% of ferrous sulfate heptahydrate.

[0042] Feed 82L of ammonia into the ferrous sulfate solution obtained after the purification treatment, and filter after sufficient reaction to obtain 258g of ferrous hydroxide precipitate and 1188g of ammonium sulfate solution. The ferrous hydroxide precipitate was washed, press-filtered and roasted to obtain 136g of product iron concentrate. Iron concentrate contains 68% iron.

[0043] Prepare 115g of quicklime, add 300g of water and stir thoroughly, mix and stir with the above ammonium sulfate ...

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Abstract

The invention discloses a resource utilization method for titanium white by-product ferrous sulphate, which solves the technical problem of incomplete utilization of titanium white by-product ferrous sulphate with low cost in the prior art. The method of the invention comprises the following steps: a, purifying and processing titanium white by-product ferrous sulphate; b, introducing ammonia gas in a ferrous sulphate solution obtained by purifying and processing, fully reacting and filtering to obtain ferrous hydroxide deposition and an ammonium sulfate solution; c, adding calcium hydrate in the ammonium sulfate solution and fully reacting to obtain dihydrate calcium sulphate deposition and ammonia gas, recovering ammonia gas as a raw material of a step b, drying the dihydrate calcium sulfate deposition and processing to obtain the product gypsum. According to the invention, sulfur and iron resources in titanium white by-product ferrous sulphate are fully used for producing industrial grade gypsum and iron ore concentrate, the problem of titanium white by-product on environmental pollution is solved; The ammonia gas can be circularly used without consumption based on theory, the loss amount needs to be added in practical production, and the production cost is low.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a resource utilization method of ferrous sulfate, a by-product of titanium dioxide. Background technique [0002] At present, since my country mainly uses the sulfuric acid method to produce titanium dioxide, and every ton of titanium dioxide produced will produce about 3.5 tons of by-product ferrous sulfate, in the titanium dioxide by-product ferrous sulfate, the main component of ferrous sulfate heptahydrate The mass percentage is about 90%. With the development of titanium dioxide industry, the output of ferrous sulfate, a by-product of titanium dioxide, is also increasing year by year. According to statistics, only the Panzhihua area produced about 500,000 to 1 million tons of ferrous sulfate, a by-product of titanium dioxide, last year. If such a large amount of titanium dioxide by-product ferrous sulfate is still treated in the original accumulation method, it w...

Claims

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Application Information

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IPC IPC(8): C01F11/46C01G49/02
Inventor 汤铁彭凌波
Owner 攀枝花市尚亿科技有限责任公司
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