Method for producing iron oxide black using desilicified mud cake

A technology of iron oxide black and desiliconized mud cake, which is applied in the direction of iron oxide/iron hydroxide, iron oxide, etc., can solve the problems of single product variety, high raw material cost, and high raw material cost, and achieve low equipment requirements, Excellent performance and less side effects

Inactive Publication Date: 2009-12-02
SHANGHAI BAOQI IRON OXIDE
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AI Technical Summary

Problems solved by technology

The traditional solution precipitation method has high requirements on raw materials, the product variety is relatively single, and the cost of raw materials is high

Method used

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Examples

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Comparison scheme
Effect test

Embodiment

[0019] Prepare ferrous sulfate solution and ferric citrine seeds.

[0020] Desiliconization mud cake treatment: Take 1000kg of desiliconization mud cake with a moisture content of 30%, add it to the mud cake beating kettle, add water while adding water to disperse, the stirring speed of the beating kettle is 45 rpm, and the capacity of the beating kettle reaches 50%. Start to feed steam to ensure that the temperature of the liquid reaches 80°C, and stir for 2 hours to fully disperse the mud cake into a slurry. Then the slurry is pumped into the filter press for hot water rinsing, and then put into another beating kettle for beating.

[0021] Oxidation pulping: pump the treated two kettles of mud cake slurry into a 50m 3 In the iron yellow reaction kettle, pour 9m 3 The iron citrine seed slurry, add a proper amount of water, add a sufficient amount of thin iron material in time, control the reaction temperature, ensure the final holding temperature of 85 ℃, and make 40m after...

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Abstract

A method for producing iron oxide black with desiliconized mud cake as raw material, comprising the following steps: (1) preparing ferrous solution; (2) preparation of iron yellow crystal seeds; (3) pretreatment of desiliconized mud cake; (4) Oxidation pulping; (5) Synthesis; (6) Screening; (7) Press filtration; (8) Drying; (9) Inspection and packaging. The invention uses the desiliconized mud cake of pickling waste liquid in steel mills as raw material to produce iron oxide black, adopts a comprehensive oxidation synthesis method, and integrates the oxidation and synthesis processes in the traditional solution precipitation method. The process is simple and requires low equipment requirements. , Less side reactions, can effectively comprehensively utilize the characteristics of desiliconization mud cake and other characteristics of pickling waste liquid in steel plants. The iron oxide black prepared by the method has excellent performance and low production cost.

Description

technical field [0001] The invention relates to a method for producing inorganic pigments, in particular to a method for producing iron oxide black by using desiliconized mud cake as a by-product obtained after utilization of pickling waste liquid in steel mills as a raw material. technical background [0002] The desiliconization mud cake produced by the cold rolling steel mill is the filter waste produced by the desiliconization device when the waste acid after pickling the steel plate is used to produce magnetic iron oxide red. The dry desiliconized mud cake is lumpy, yellow-red, and mud-like. After drying at 100°C, the total iron content is 50%-65%, and the sieve residue is ≤0.2%. The particle fineness of the mud cake is good. The main component is Fe(OH) 3 , Fe(OH) 2 and moisture, also contains about 1% SiO 2 and FeO. [0003] A large-scale cold-rolled steel mill can produce nearly 10,000 tons of desiliconized mud cake every year, which has become an important subje...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/08
Inventor 谭刚张宏锦杨建民陈元峻刘军
Owner SHANGHAI BAOQI IRON OXIDE
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