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Method for preparing iron oxide red by utilizing iron-containing wastes and iron oxide red pigment

A technology of iron oxide red and iron hydroxide, which is applied in the field of iron oxide red pigments, can solve the problems of waste of resources, environment, pollution, etc., and achieve the effects of avoiding pollution, high economic benefits, and excellent economic value

Inactive Publication Date: 2018-11-13
CHANGZHOU SANLE ANTICORROSIVE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for preparing iron oxide red by using iron-containing waste, aiming to improve the problem of waste of resources or environmental pollution caused by direct landfill or discard of existing iron-containing waste, and at the same time aiming to provide a method with high yield The preparation method of iron oxide red

Method used

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Examples

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Effect test

Embodiment 1

[0034] The present embodiment provides a kind of method that utilizes iron-containing waste to prepare iron oxide red, comprises the steps:

[0035] The pickling steel pipes, seamless steel pipes, electric steel rods, thin plates and steel rolling plates of steel mills are used as raw materials, and sodium hydroxide is added to the washing liquid to completely precipitate the iron ions in the solution. Then filter to obtain a filter cake, take 500g of the filter cake and place it in an incubator, and dry it at a constant temperature for 5 hours in the presence of oxygen at 120°C to obtain 149g of dry iron hydroxide powder; place the dry iron hydroxide powder in a high-temperature-resistant vessel, and then transfer Into the crystal transformation furnace, dehydration in the molecule under the airtight condition of 400°C for 180min, transferred out of the crystal transformation furnace to cool, and standardized to obtain 111g of iron oxide red pigment. 149g iron hydroxide shoul...

Embodiment 2

[0037] The present embodiment provides a kind of method that utilizes iron-containing waste to prepare iron oxide red, comprises the steps:

[0038] The pickling steel pipes, seamless steel pipes, electric steel rods, thin plates and steel rolling plates of steel mills are used as raw materials, and sodium hydroxide is added to the washing liquid to completely precipitate the iron ions in the solution. Then filter to obtain a filter cake, take 600g of the filter cake and place it in an incubator, and dry it at a constant temperature for 3 hours in the presence of oxygen at 180°C to obtain 240g of dry iron hydroxide powder; place the dry iron hydroxide powder in a high-temperature-resistant vessel, and then transfer Into the crystal transformation furnace, dehydrated intramolecularly for 120min under the airtight condition of 450°C, transferred out of the crystal transformation furnace to cool, and standardized to obtain 178g of iron oxide red pigment. 240g iron hydroxide shoul...

Embodiment 3

[0040] The present embodiment provides a kind of method that utilizes iron-containing waste to prepare iron oxide red, comprises the steps:

[0041] The pickling steel pipes, seamless steel pipes, electric steel rods, thin plates and steel rolling plates of steel mills are used as raw materials, and sodium hydroxide is added to the washing liquid to completely precipitate the iron ions in the solution. Then filter to obtain a filter cake, get 700g of the filter cake and place it in a constant temperature box, and dry it at a constant temperature for 3.5h under the condition of 150°C in the presence of oxygen to obtain 356g of ferric hydroxide dry powder; place the ferric hydroxide dry powder in a high-temperature-resistant vessel, and then Transfer to a crystal transformation furnace, dehydrate intramolecularly for 60 minutes under airtight conditions at 600°C, transfer out of the crystal transformation furnace to cool, and standardize to obtain 265.0 g of iron oxide red pigmen...

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Abstract

The invention relates to the technical field of chemical industry and provides a method for preparing iron oxide red by utilizing iron-containing wastes. The method comprises the following steps: converting an iron element in the iron-containing wastes into ferric hydroxide, ferrous hydroxide or a mixture of ferric hydroxide and ferrous hydroxide; then carrying out constant-temperature drying for3 to 5h at 120 to 180 DEG C in the presence of oxygen gas, so as to obtain dry powder; storing the dry powder for 40 to 180min under a sealed condition at 400 to 800 DEG C, so as to obtain gamma-Fe2O3. The method provided by the invention can be used for recycling the iron-containing wastes and resources are avoided; the yield of iron oxide red is high and the economic benefits are relatively high. The invention further provides an iron oxide red pigment; the iron oxide red pigment is obtained through gamma-Fe2O3 in a standardized manner; iron oxide red pigment has relatively excellent economic benefits.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for preparing iron oxide red from iron-containing waste and iron oxide red pigment. Background technique [0002] At present, enterprises such as pickling and cold drawing of steel pipes, seamless steel pipes, shop steel rods, special sheets for automobiles, and steel rolling produce pickling rinse water, sludge solid waste, phosphating slag solid waste and other waste during the production process. And the total amount of waste is large, and the existing usual treatment methods are filling up, incineration, etc., which do not have the proper effect of volatilizing the useful substances contained in the waste, resulting in waste of resources, and will also affect The environment is polluted. [0003] In view of this, this application is proposed. Contents of the invention [0004] The invention provides a method for preparing iron oxide red by using iron-co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06
CPCC01G49/06
Inventor 薛贤张晗
Owner CHANGZHOU SANLE ANTICORROSIVE MATERIAL CO LTD
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