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Method for producing iron oxide black from desiliconized sludge cake by one-step process

A technology of desiliconizing mud cake and iron oxide black, which is applied in the field of inorganic materials to achieve the effects of low cost, saving consumption and reducing production steps

Inactive Publication Date: 2014-05-14
SHANGHAI BAOQI IRON OXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to aim at the defect of above-mentioned prior art, provide a kind of method of one-step method desiliconization mud cake to produce the method for iron oxide black, use steel plant pickling waste liquid desilication mud cake as raw material, one-step synthetic iron oxide black replaces existing There is a two-step process for producing iron oxide black. On the one hand, it solves the problem of desiliconization mud cake treatment, on the other hand, it improves the efficiency of waste material circulation, and at the same time reduces production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Ingredients:

[0024] Desiliconization mud cake beating: take 1000kg of desilication mud cake with 50% moisture within 24 hours produced by the cold rolling plant, and add it to the 2m 3 In the beating kettle of water, disperse while adding and pouring, the stirring speed of the beating kettle is 45 rpm, and stir for 2 hours to fully disperse the mud cake into a slurry with a total volume of 2.5 cubic meters and a solid content of 20%. The content of ferrous hydroxide in the desiliconization mud slurry was determined by potassium dichromate titration method, and the content of ferrous hydroxide was measured to be 7.2wt% (180kg / 2.5 cubic meters); the desilication mud was determined by suction filtration and drying method The content of iron red in the material, the measured content is 12.8wt% (320kg / 2.5 cubic meters);

[0025] Iron red beating: put 500kg iron red dry powder into 2.5m 3 In the water, the measured content is 16.7wt%, take 2 / 5 of it, (containing 200kg of ...

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Abstract

The invention discloses a method for producing iron oxide black from desiliconized sludge cake by a one-step process. By improving the material flow process, the invention utilizes Fe(OH)2, which is generated from ferrous chloride and ammonia water generated in the desiliconized sludge cake, to directly participate in the preparation of the iron oxide black, and abandons the past two-step method of respectively preparing a ferrous sulfate solution and ferrite yellow. Compared with the traditional technique, the invention reduces the production steps, enhances the efficiency, saves the consumption of waste acid and alkali liquor, and prepares the good-performance low-cost iron oxide black on the basis of the desiliconized sludge cake in the mass treatment process of steel mill acid washing waste liquor.

Description

technical field [0001] The invention relates to the technical field of inorganic materials, in particular to a method for producing iron oxide black from a one-step desiliconization mud cake. technical background [0002] Iron oxide black is a chemical product widely used in construction, paint and other industries. It can be used in colored cement, colored cement floor tiles, colored cement tiles, imitation glazed tiles, concrete floor tiles, colored mortar, colored asphalt, terrazzo, mosaic Tiles, artificial marble and wall painting, etc.; can also be used to make various paints, coatings and inks. In other industries, it can also be used as colorant and filler. [0003] The traditional method of producing iron oxide black mostly uses ferrous sulfate solution and sodium hydroxide to react to generate ferrous hydroxide, and then ferrous hydroxide is synthesized with ferric oxide to precipitate iron oxide black. The traditional solution precipitation method The requirement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/08
Inventor 陈元峻沈静丁雪良秦峰
Owner SHANGHAI BAOQI IRON OXIDE