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, ferric oxide, etc., can solve the problems of high raw material cost, high raw material cost, single product variety, etc., and achieve low equipment requirements , Excellent performance, less side effects

Inactive Publication Date: 2006-07-26
SHANGHAI BAOQI IRON OXIDE
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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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  • Method for producing iron oxide black using desilicified mud cake
  • Method for producing iron oxide black using desilicified mud cake

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] Preparation of ferrous solution and ferric citrine seeds.

[0022] Desiliconized mud cake treatment: Take 1000kg of desiliconized mud cake with a water content of 30%, and 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% At this time, steam was introduced to ensure that the liquid temperature reached 80°C, and stirred 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.

[0023] 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 a...

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Abstract

The disclosed preparation method for Fe2O3 black with desilicated mud cake as material comprises: (1) preparing Fe2+ solution; (2) preparing ferrite-yellow crystal seed; (3) pre-treating the desilicated mud cake; (4) oxidating and slurrying; (5) composing; (6) screening; (7) pressure filtering; (8) drying; (9) checking and packing. This invention is simple, and has low request to the device and little side reaction.

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. Background technique [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 Applications(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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