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Method for preparing iron oxide red by byproduct ferrous sulfate of titanium dioxide

A technology of ferrous sulfate and iron oxide red, which is applied in the direction of iron oxide/iron hydroxide, fibrous filler, etc., can solve the problem of small amount of waste secondary ferrous sulfate, and achieve environmental protection, environmental protection, production The effect of simple process

Inactive Publication Date: 2011-02-02
张晓东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Regarding the treatment of titanium dioxide waste paraferrous sulfate, in the past it was only used as an iron catalyst, water purifier, feed additive, soil improver, etc., but the amount of titanium dioxide waste paraferrous sulfate that can be treated is very small

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: A method for preparing iron oxide red by utilizing titanium dioxide by-product ferrous sulfate

[0031] The specific steps are as follows:

[0032] a. Purification and impurity removal of ferrous sulfate: first introduce 9 tons of titanium dioxide by-product ferrous sulfate into a container with a stirrer, the percentage of ferrous sulfate is 90%, start the stirrer to stir, and the stirring speed is 30 RPM ~ 42 RPM, add water continuously during the stirring process to make it fully dissolved, adjust the Baume degree of the solution to 30, then put in the flocculant polyacrylamide, the amount of polyacrylamide added is the total amount of ferrous sulfate 0.1% of the amount, stirred, and stood still for 3 hours. The supernatant obtained after standing still was the purified ferrous sulfate solution, and the residual sediment at the bottom of the container was discharged into the waste secondary treatment pool in the production of iron oxide red pigment, and co...

Embodiment 2

[0038] Embodiment two: a kind of method that utilizes titanium dioxide by-product ferrous sulfate to prepare iron oxide red, no longer narrate the same part as embodiment one, and difference is:

[0039] a. Purification and impurity removal of ferrous sulfate: first introduce 9 tons of titanium dioxide by-product ferrous sulfate into a container with agitator, the percentage of ferrous sulfate is 85%, start the agitator to stir, and keep stirring during the stirring process Add water to make it fully dissolve, adjust the Baume degree of the solution to 20, then put in polyacrylamide accounting for 0.3% of the total amount of ferrous sulfate, stir and stand still for 4 hours, the supernatant obtained after standing still is purified sulfuric acid ferrous solution;

[0040]B, pump the clear liquid ferrous sulfate solution gained in step a into another container with agitator, start the agitator to stir, slowly add the ammoniacal liquor that concentration is 18% in the stirring p...

Embodiment 3

[0044] Embodiment three: a kind of method that utilizes titanium dioxide by-product ferrous sulfate to prepare iron oxide red, and the same place as embodiment one is no longer described, and difference is:

[0045] a. Purification and impurity removal of ferrous sulfate: first introduce 9 tons of titanium dioxide by-product ferrous sulfate into a container with agitator, the percentage of ferrous sulfate is 88%, start the agitator to stir, and keep stirring during the stirring process Add water to make it fully dissolve, adjust the Baume degree of the solution to 25, then put in polyacrylamide accounting for 0.5% of the total amount of ferrous sulfate, stir and stand still for 2 hours, the supernatant obtained after standing still is purified sulfuric acid ferrous solution;

[0046] B, pump the clear liquid ferrous sulfate solution gained in step a into another container with agitator, start the agitator to stir, slowly add the ammoniacal liquor that concentration is 20% in t...

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PUM

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Abstract

The invention discloses a method for preparing iron oxide red by taking byproduct ferrous sulfate of titanium dioxide as a raw material. The method comprises the following steps: purifying the byproduct ferrous sulfate, removing impurities, pouring the purified ferrous sulfate solution into a container, stirring the solution and adding ammonia water, adjusting the pH value of the solution to be between 6.5 and 9, and stopping the addition of ammonia water; washing and filtering the obtained material, and stopping until the pH value of the solution is between 6.5 and 7 to obtain filter cake and filtrate; and calcining the obtained filter cake in a rotary kiln to obtain an iron oxide red semi-finished product, putting the semi-finished product into a ball mill, adding water for ball milling, washing, filtering and drying the obtain material after ball milling, and crushing after drying to obtain an iron oxide red product. The method solves the problem of treating the byproduct for titanium dioxide manufacturers, is favorable for environmental protection, and reduces the production cost of iron oxide red; and the iron oxide red prepared by the method is mainly used in aspects of coloring agents, antirust paint pigment, ceramic pigment of building materials, polishing agents of precision parts, and the like.

Description

1. Technical field: [0001] The invention relates to a method for preparing iron oxide red, in particular to a method for preparing iron oxide red by using ferrous sulfate, a by-product of titanium dioxide. 2. Background technology: [0002] Iron oxide red is a common inorganic pigment widely used in coatings, building materials, plastics, electronics and other fields; high-purity iron oxide red can be used as a polishing agent for optical glass and advanced abrasive materials. There are two common production methods for iron oxide red: [0003] The first is the green vitriol calcination method: this method uses pure green vitriol as a raw material for high-temperature calcination, and the produced iron oxide red is washed with water, dried, and crushed to become a product. [0004] The second is the wet air oxidation method: the main raw material of this method is iron sheet, and the production process starts from the preparation of seed crystals, using sulfuric acid or nit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/02C09C1/24
Inventor 张晓东
Owner 张晓东