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Processing method for boron mud reutilization

A treatment method and boron mud technology are applied in the field of waste boron mud reuse and treatment, which can solve the problem of high content of harmful elements, achieve the effects of low price, elimination of fluorine pollution, and significant economic benefits

Active Publication Date: 2012-09-05
无锡智慧兴宜信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a treatment method for boron mud to be used in metallurgical slag-making materials to remove harmful impurities and realize reuse, to solve the problem of high content of harmful elements such as phosphorus and sulfur in boron mud used in metallurgical slag-making, and to improve The amount and scope of application of boron mud

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a. Raw material processing and roasting processing

[0025] Taking the boron mud produced by the production of borax in a factory in my country as the raw material, the composition of the boron mud after being dried in caustic soda at 200°C for 0.5 hours is analyzed as follows (mass fraction %): B 2 O 3 2.5%, CaO 17.5%, Fe 2 O 3 5%, SiO 2 15%, MgO 38%, Al 2 O 3 8%, P 1.6%, S 0.8%, the rest are trace acid-insoluble impurities;

[0026] b. Grinding, carbonizing and mixing

[0027] The calcined boron sludge is ground into powder, and the particle size is 0.075mm through conventional crushing and sieving, and then the carbon is mixed. The carbon amount is according to the formula: [C]%=0.3×[Fe 2 O 3 ]%+1.0×[P]%+excess amount calculation, the excess carbon amount is 2%, so the allocation amount of carbon is: [C]%=0.3×5%+1.0×1.6%+2%=5.1%;

[0028] c. Using the press ball method, press the boron mud powder mixed with carbon to press the ball, and the particle size of the finished b...

Embodiment 2

[0033] a. Raw material processing and roasting processing

[0034] Taking the boron mud produced by a factory in Liaoning, my country as raw material, the composition of the boron mud after drying caustic soda at 300°C for 1 hour is analyzed as follows (mass fraction %): B 2 O 3 1.5%, CaO 12.5%, Fe 2 O 3 7%, SiO 2 15%, MgO 48%, Al 2 O 3 9%, P 1.2%, S 0.9%, the rest are trace acid-insoluble impurities;

[0035] b. Grinding, carbonizing and mixing

[0036] The calcined boron sludge is ground into powder, and the particle size is 0.05mm through conventional crushing and screening, and then the carbon is mixed. The carbon amount is according to the formula: [C]%=0.3×[Fe 2 O 3 ]%+1.0×[P]%+excess amount calculation, the excess carbon amount is taken as 3%, so the allocated carbon amount is: [C]%=0.3×7%+1.0×1.2%+3%=6.3%;

[0037] c. Using the press-ball method to press the boron mud powder mixed with carbon and uniformly, the particle size of the finished ball is controlled at 18-19mm;

[0...

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Abstract

The invention relates to the technical field of waste boron mud reutilization, and particularly relates to a processing method for reutilization of boron mud as a metallurgy slag marking material through removing harmful impurities. The processing method is characterized in that a method comprising the steps of drying, carbon blending, pellet formation and reduction roasting is adopted, and hazardous materials including water, phosphorus and sulfur and the like in the boron mud are removed. The processing method provided by the invention reduces phosphorus oxide in the boron mud through carbon blending and roasting, the phosphorus oxide is reduced into phosphorus steam, the boron mud dephosphorization is realized, thus the harmless treatment for boron mud used for steelmaking slag forming is realized, and the phosphorus steam is also used for recovering simple substance phosphorus; and therefore, the processing method provided by the invention realizes the waste boron mud harmless reutilization, and has many technical and economy advantages.

Description

technical field [0001] The invention relates to the technical field of waste boron mud reuse treatment, in particular to a treatment method for boron mud used in metallurgical slagging materials to remove harmful impurities and realize reuse. Background technique [0002] my country is rich in boron resources, with proven reserves exceeding 100 million tons (in B 2 o 3 count), is one of the few boron resource-rich countries in the world; however, most of the boron ores in my country are of low grade, and most of them are mixed ores such as boronite and boronmagnesium iron. After extracting borax by carbon-soda method, a large amount of waste Boron mud (note: according to the current production process, 3-4 tons of boron mud will be produced for every ton of borax produced); the main components of boron mud are MgO, CaO, Fe 2 o 3 , B 2 o 3 etc. Research on the comprehensive utilization of boron mud has also been carried out, such as the use of boron mud to produce boron-m...

Claims

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Application Information

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IPC IPC(8): C21C7/076
CPCY02P10/20
Inventor 王宏明李桂荣赵玉涛赵钊
Owner 无锡智慧兴宜信息技术有限公司