Method for producing pigment-level iron oxide red by using titanium dioxide waste residue ferrous sulfate

A technology of ferrous sulfate and ferrous sulfate solution, which is applied in the chemical industry, can solve the problems of impurity removal, poor application performance, iron red red brightness, and insufficient hiding power dispersibility, etc., and achieves low environmental pollution and effective Conducive to environmental protection, low cost effect

Active Publication Date: 2014-08-06
攀枝花市大牛科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method introduces a large amount of sulfate radicals in the preparation process, removes impurities, and does not go through the calcination process, which makes iron red insufficient in red brightness, hiding power, dispersibility and other properties, and its application performance is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A. Purification and impurity removal of ferrous sulfate: first transfer 700g of titanium dioxide waste slag ferrous sulfate to a reactor with a stirrer, the percentage of ferrous sulfate is 90%, add 1500ml of water, start the stirrer to stir, Heat to 55°C to fully dissolve, add iron powder to react for 15 minutes, heat up to above 70°C, control the reaction pH to 3.5-4.5, keep warm for 15 minutes, remove Ti, Pb, Ni and other metal impurities in the solution, and cool down to below 70°C , add flocculant cationic polyacrylamide, molecular weight 800-12 million, the addition amount of cationic polyacrylamide is 0.2% of the total amount of ferrous sulfate, stir and stand still for more than 10 hours, the supernatant obtained after resting is purified sulfuric acid The ferrous solution and the residual sediment at the bottom of the reactor are discharged into the waste secondary treatment pool, and the concentrated treatment reaches the standard discharge.

[0035] B, the so...

Embodiment 2

[0041] A. Purification and impurity removal of ferrous sulfate: first transfer 1400g of titanium dioxide by-product ferrous sulfate to a reactor with agitator, the percentage of ferrous sulfate is 85%, add 3000ml of water, and purify and remove impurities Afterwards (process with reference to example one A step), stand still more than 10 hours, the supernatant liquid gained after standing still is the ferrous sulfate solution after the purification.

[0042] B, the solution of step A is vacuum filtered to obtain 3000ml of clear liquid ferrous sulfate solution, and the concentration is 35.8%; get the ferrous sulfate solution of 300ml, after diluting in a ratio of 1:3, transfer it to the iron black reactor Stir, slowly add 780ml ammoniacal liquor and 2700ml ferrous sulfate solution simultaneously and heat in stirring process, blow in compressed air continuously simultaneously, the compressed air flow rate is 12L / min, the flow ratio of control ammoniacal liquor and ferrous sulfate...

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Abstract

The invention discloses a method for producing pigment-level iron oxide red by using titanium dioxide waste residue ferrous sulfate and belongs to the technical field of chemical industry. The pigment-level iron oxide red with excellent performance can be prepared by the method. The method comprises the following steps of: a, removing impurities from the titanium dioxide waste residue ferrous sulfate to prepare a ferrous sulfate solution; b, oxidizing the ferrous sulfate in the solution obtained in the step a to obtain an iron oxide black sediment, and filtering to obtain a filter cake and a filtrate; and c, washing, drying and crushing the filter cake obtained in the step b, and calcining the crushed filter cake to obtain the pigment-level iron oxide red, preferentially, the crushed filter cake is calcined under an aerobic condition, wherein the calcining temperature is 600 to 750 DEG C, and the calcining time is 45 to 60 minutes. The method is low in raw material cost and low in environment pollution; the prepared product has the advantages of bright color and luster, and high tinting strength, oil absorption and dispersibility; and the yield reaches the top standard of an iron oxide red pigment stated by GB 1863-89.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for producing pigment-grade iron red by utilizing ferrous sulfate of titanium dioxide waste residue. Background technique [0002] Iron oxide red is a common inorganic pigment that has been used by people for thousands of years. Iron red has good heat resistance, does not change color at 500°C, does not change chemical structure at 1200°C, and is extremely stable ; It can absorb the ultraviolet spectrum in sunlight, so it has a protective effect on the coating, and it is resistant to dilute acid, alkali, water, and solvents, making it have good weather resistance. [0003] With the advancement of science and technology, in recent years, people have endowed iron oxide red with more uses, such as: synthetic mica iron oxide as non-toxic anti-rust pigment; iron oxide-coated mica as pearlescent pigment, etc. Iron oxide red is common There are two main p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06B09B3/00
Inventor 徐伟赵中原罗俊奎冯庆祥
Owner 攀枝花市大牛科技有限公司
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