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Iron oxide red and preparation method thereof

A technology of iron oxide red and iron hydroxide, which is applied in the direction of iron oxide, iron oxide/iron hydroxide, etc., can solve the problems of high transportation cost, low value of ferric chloride, and difficulty in market expansion, so as to save energy and shorten Process flow and good economic benefits

Active Publication Date: 2014-05-28
CHINA SHENHUA ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] How to effectively utilize the gallium extraction eluent and generate economic benefits is a current research and development hotspot, wherein CN102502880A discloses a method for preparing ferric chloride water purifier by oxidation and concentration of ferrous chloride waste liquid, but the trichloride Iron is a low-value liquid product with high transportation costs, and it is difficult to expand away from the market, so it is difficult to obtain good production efficiency

Method used

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  • Iron oxide red and preparation method thereof
  • Iron oxide red and preparation method thereof
  • Iron oxide red and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]1) Weigh 250ml of the gallium-extracting resin eluent, add 2mol / L ammonia water to the gallium-extracting resin eluent at room temperature, adjust the pH of the gallium-extracting resin eluent to 6, stir and oxidize, and make the gallium-extracting resin elute The aluminum ions contained in the dehydration and the oxidized ferric ions form aluminum hydroxide and iron hydroxide precipitates. Filter to obtain ferrous chloride solution.

[0034] 2) Feed into the ferrous chloride solution with a flow rate of 30L / h of oxygen (the feed of oxygen is based on the complete oxidation of ferrous iron in the solution to ferric iron as a standard) to generate ferric chloride solution. Adopt the ammoniacal liquor of concentration 2mol / L to adjust the pH of ferric chloride solution to be 4, make it generate ferric hydroxide precipitate; Filter, adopt spray washing, remove the potassium, sodium, calcium and magnesium plasma adsorbed on the surface of ferric hydroxide precipitate, obtain...

Embodiment 2

[0040] 1) Weigh 250ml of the gallium-extracting resin eluent, add ammonia water with a concentration of 3mol / L to the gallium-extracting resin eluent at room temperature, adjust the pH of the gallium-extracting resin eluent to 5, stir and oxidize, and make the gallium-extracting resin eluate The aluminum ions contained in the resin eluent and the oxidized ferric ions form aluminum hydroxide and iron hydroxide precipitates. Filter to obtain ferrous chloride solution.

[0041] 2) Feed into the ferrous chloride solution to make it generate ferric chloride solution with a flow rate of 50L / h of oxygen. Use 2mol / L ammonia water to adjust the pH of the ferric chloride solution to 2 to make it generate ferric hydroxide precipitate; filter and use spray washing to remove the potassium, sodium, calcium and magnesium plasma adsorbed on the surface of the ferric hydroxide precipitate to obtain pure precipitation of ferric hydroxide.

[0042] 3) The ferric hydroxide precipitate was dried...

Embodiment 3

[0047] 1) Weigh 250ml of the gallium-extracting resin eluent, add 4mol / L ammonia water to the gallium-extracting resin eluent at room temperature, adjust the pH of the gallium-extracting resin eluent to 7, stir and oxidize, and make the gallium-extracting resin elute The aluminum ions contained in the dehydration and the oxidized ferric ions form aluminum hydroxide and iron hydroxide precipitates. Filter to obtain ferrous chloride solution.

[0048] 2) Feed into the ferrous chloride solution to make it generate ferric chloride solution with a flow rate of 35L / h. Adopt 4mol / L ammonia water to adjust the pH of ferric chloride solution to be 5 to make it generate ferric hydroxide precipitate; filter, adopt spray washing to remove potassium, sodium, calcium and magnesium plasma adsorbed on the surface of ferric hydroxide precipitate to obtain pure precipitation of ferric hydroxide.

[0049] 3) The ferric hydroxide precipitate was dried in an oven at 110°C, and then calcined in a...

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Abstract

The invention discloses iron oxide red and a preparation method thereof. The preparation method comprises the steps of using a gallium extraction resin eluant as a raw material, treating the gallium extraction resin eluant and obtaining the iron oxide red. The gallium extraction resin eluant produced in an aluminum oxide production process by a pulverized fuel ash acid method is subjected to the treatment such as purification, refining, precipitation and burning, and a high index iron oxide red product meeting a national primary standard and having iron oxide content up to 99.3wt% is obtained. Therefore, the method shortens a technological flow, saves energy sources, produces a better economic benefit, opens up a new efficient treatment approach for composing the complicated gallium extraction resin eluant, has an important significance in boosting gallium extraction, realizes waste utilization and also provides a new preparation approach for producing the iron oxide red at the same time.

Description

technical field [0001] The invention relates to the technical field of fly ash treatment, in particular to iron oxide red and a preparation method thereof. Background technique [0002] Fly ash is one of the largest industrial wastes in my country. With the development of coal-based heavy industries such as the electric power industry, the discharge of coal-fired fly ash is increasing year by year. The pollution of fly ash to the environment is multifaceted and cannot be ignored. Therefore, the treatment and utilization of fly ash has attracted widespread attention. [0003] The content of gallium in the high-aluminum fly ash produced by Shenhua Zhungeer Energy Co., Ltd. is greater than 85g / ton. During the production of alumina by acid method, metal gallium is further enriched in the iron removal regeneration solution, which has high extraction value . Resin adsorption gallium extraction technology has the characteristics of high recovery rate, simple process, safety and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06
Inventor 高桂梅张维世徐会军陈东姬学良钞晓光曹坤王宏宾
Owner CHINA SHENHUA ENERGY CO LTD
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