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Diatomite raw material purification method applied to blast furnace body refractory material

A technology of refractory materials and purification methods, which is applied in the field of diatomite raw material purification, can solve problems such as inability to purify low-grade diatomite, and achieve the effects of overcoming large-scale industrial use, simple operation, and mild experimental conditions

Pending Publication Date: 2021-11-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a problem that the existing single purification method and combined purification method cannot purify low-grade diatomite into high-purity diatomite.

Method used

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  • Diatomite raw material purification method applied to blast furnace body refractory material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] like figure 1 As shown, the diatomite raw material purification method applied to blast furnace body refractories, its specific steps include:

[0025] (1) 200-300 mesh diatomite raw soil (SiO 2 The content of Fe is 58.96%. 2 o 3 The content of Al is 8.64%; Al 2 o 3 The content of MgO is 13.33%; the content of MgO is 1.58%) and roasted at a temperature of 300 ° C for 5 hours to obtain roasted diatomite;

[0026] (2) Place the roasted diatomite obtained in step (1) in sodium hydroxide solution (the mass percent concentration of sodium hydroxide solution is 1%, and the liquid-solid ratio of roasted diatomite to sodium hydroxide solution is 3:1mL / g ) to obtain diatomite suspension I, and diatomite suspension I was reacted at a temperature of 75°C for 30 minutes, then suction filtered, washed until the pH was neutral, and dried to obtain diatomite I;

[0027] (3) Place the diatomite I obtained in step (2) in a high-concentration sulfuric acid solution (the mass percen...

Embodiment 2

[0031] like figure 1 As shown, the diatomite raw material purification method applied to blast furnace body refractories, its specific steps include:

[0032] (1) 200-300 mesh diatomite raw soil (SiO 2 The content of Fe is 58.96%. 2 o 3 The content of Al is 8.64%; Al 2 o 3 The content of MgO is 13.33%; the content of MgO is 1.58%) and roasted at a temperature of 800 ° C for 4 hours to obtain roasted diatomite;

[0033] (2) Place the roasted diatomite obtained in step (1) in sodium hydroxide solution (the mass percent concentration of sodium hydroxide solution is 7%, and the liquid-solid ratio of roasted diatomite to sodium hydroxide solution is 6:1mL / g ) to obtain diatomite suspension I, and diatomite suspension I was reacted at a temperature of 40°C for 75 minutes, then suction filtered, washed until the pH was neutral, and dried to obtain diatomite I;

[0034] (3) Place the diatomite I obtained in step (2) in a high-concentration sulfuric acid solution (the mass percen...

Embodiment 3

[0038] like figure 1 As shown, the diatomite raw material purification method applied to blast furnace body refractories, its specific steps include:

[0039] (1) 200-300 mesh diatomite raw soil (S SiO 2 The content of Fe is 58.96%. 2 o 3 The content of Al is 8.64%; Al 2 o 3 The content of MgO is 13.33%; the content of MgO is 1.58%) and roasted at a temperature of 600 ° C for 4.5 hours to obtain roasted diatomite;

[0040] (2) Place the roasted diatomite obtained in step (1) in sodium hydroxide solution (the mass percent concentration of sodium hydroxide solution is 6%, and the liquid-solid ratio of roasted diatomite to sodium hydroxide solution is 4:1mL / g ) to obtain diatomite suspension I, and diatomite suspension I was reacted at a temperature of 55°C for 50 minutes, then suction filtered, washed until the pH was neutral, and dried to obtain diatomite I;

[0041] (3) Place the diatomite I obtained in step (2) in a high-concentration sulfuric acid solution (the mass pe...

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Abstract

The invention relates to a diatomite raw material purification method applied to a blast furnace body refractory material, and belongs to the technical field of blast furnace body refractory materials. The method comprises the steps: roasting diatomite under original soil to obtain roasted diatomite; placing the obtained roasted diatomite in a sodium hydroxide solution for reaction, then carrying out suction filtration, washing until the pH value is neutral, and drying to obtain diatomite I; placing the obtained diatomite I in a high-concentration sulfuric acid solution for reaction, then carrying out suction filtration, washing until the pH value is neutral, and drying to obtain diatomite II; placing the obtained diatomite II in a sodium hexametaphosphate solution for ultrasonic oscillation, then adding distilled water to adjust the mass concentration of the solution to be 10%, standing for 5 minutes to obtain a mixed solution, layering the mixed solution, taking bottom layer slurry, filtering, washing and drying to obtain the refined diatomite applied to the blast furnace body refractory material. According to the diatomite purification method disclosed by the invention, low-grade diatomite is effectively purified into high-purity diatomite.

Description

technical field [0001] The invention relates to a diatomite raw material purification method applied to blast furnace body refractory materials, and belongs to the technical field of blast furnace body refractory materials. Background technique [0002] With the continuous improvement of blast furnace smelting technology, the requirements for refractory materials are also higher. The requirements for studying whether blast furnace refractory materials are easy to break are getting higher and higher. Blast furnace refractory materials should also meet the requirements of blast furnace smelting. The blast furnace smelting process includes complex physical and chemical changes. After the ironmaking raw materials are added from the top of the blast furnace, they are obtained through preheating, reduction and melting of iron oxides, dripping flow and separation of iron and slag, coke combustion and reaction. pig iron. The smelting process is carried out continuously at high temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/14C04B35/626
CPCC04B35/66C04B35/14C04B35/62605
Inventor 周晓雷王云鹏张闯白晶
Owner KUNMING UNIV OF SCI & TECH