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Production technology for iron phosphate and production device thereof

A production process, a technology of iron phosphate, applied in the direction of phosphorus compounds, inorganic chemistry, non-metallic elements, etc., can solve the problems of large environmental impact, high cost of sewage treatment, and large amounts of waste water.

Pending Publication Date: 2019-05-17
博创宏远新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production process and equipment of ferric phosphate are commonly used. The degree of automation is low, and the production process produces a large amount of wastewater. If it is not treated, it will have a great impact on the environment. The cost of sewage treatment is high, and the applicability of the equipment is low, so it cannot be adapted to various types of product processes

Method used

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  • Production technology for iron phosphate and production device thereof
  • Production technology for iron phosphate and production device thereof
  • Production technology for iron phosphate and production device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] Iron solution synthesis: use 682kg 98.5% iron powder, 1425kg 85% phosphoric acid, 1200kg 98% sulfuric acid and 7693kg pure water to carry out acidolysis reaction to prepare iron solution. After preparation, the concentration of phosphoric acid in the iron solution was 1.236mol / L, the concentration of H+ supplied by sulfuric acid was 2.4mol / L, the concentration of iron ions was 1.2mol / L, and the reaction temperature was 85°C. After the reaction, filter and demagnetize to obtain a final 11000kg iron solution.

[0122] Ferric phosphate synthesis: After the iron solution enters the ferric phosphate synthesis equipment, first add 890kg of hydrogen peroxide, and the oxidation temperature is 30-70°C. Fully oxidize until there is no red color detected by o-phenanthroline. After the oxidation is completed, add 3570kg of 8% ammonia water to control the pH at 1.5, so that iron ions and phosphate ions are combined and precipitated. Raise the temperature of the above ferric phosph...

Embodiment 2

[0130] Iron solution synthesis: Utilize 2808kg 99% ferrous sulfate, 1188kg 85% phosphoric acid and 7000kg pure water to carry out acidolysis reaction, prepare iron solution. After preparation, the concentration of phosphoric acid in the iron solution is 1.03 mol / L, the concentration of iron ions is 1 mol / L, and the reaction temperature is 50°C. After the reaction, filter and demagnetize to obtain the final iron solution.

[0131] Ferric phosphate synthesis: After the iron solution enters the ferric phosphate synthesis equipment, first add 742kg of hydrogen peroxide, and the oxidation temperature is 30-70°C until no red color is detected by phenanthroline. After the oxidation is completed, add 6000kg of 12% sodium hydroxide solution to control the pH at 1.8, so that iron ions and phosphate ions are combined and precipitated. Raise the temperature of the above ferric phosphate slurry to 98°C to convert the ferric phosphate crystal form, and convert the amorphous ferric phosphat...

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Abstract

The invention discloses a production technology for iron phosphate and a production device thereof. The production technology for iron phosphate comprises the following steps: 1) synthesizing an ironsolution; 2) synthesizing iron phosphate; 3) washing; 4) recycling washing liquor; 5) drying and sintering; 6) smashing, mixing and packaging. The device used in the invention has a simple structure and convenience in operation; raw materials are extensive in source, easy to get and low in cost; a great convenience is brought to industrial production. The technology defined in the invention is high in applicability and is capable of adapting to various raw materials, such as iron source, phosphorus source and oxidizing agent; wastewater generated by the production technology of the invention can be conventionally treated and then recycled; recycling of water resource can be realized; salts in recycled wastewater are used as raw materials; the risk in polluting environment of discharging can be reduced; cost of raw materials is lowered.

Description

technical field [0001] The invention belongs to the technical field of lithium battery material manufacturing, and in particular relates to a production process of iron phosphate and production equipment thereof. Background technique [0002] Iron phosphate is one of the main raw materials for the preparation of lithium iron phosphate, a cathode material for lithium batteries. As the key material of lithium-ion batteries, lithium iron phosphate cathode material has the advantages of high safety, low cost and long life. At present, the commonly used ferric phosphate production process and equipment have a low degree of automation, and the production process produces a large amount of wastewater. If it is not treated, it will have a great impact on the environment, the cost of sewage treatment is high, and the applicability of the equipment is low, so it cannot be adapted to various types of product processes. Contents of the invention [0003] In view of the above-mentione...

Claims

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Application Information

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IPC IPC(8): C01B25/37
Inventor 江文革方东东
Owner 博创宏远新材料有限公司
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