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Method for preparing synthetic forsterite from boron slurry

A technology for synthesizing forsterite and forsterite powder, which is applied in the direction of aluminum silicate and silicate, can solve the problems of unsatisfactory synthesis effect and high preparation cost, and achieve environmental and ecological pollution, less impurity content, and reduction of The effect of generating quantity

Inactive Publication Date: 2012-10-24
聂旺发
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the existing technology, there is also a method for preparing synthetic forsterite by mixing natural forsterite with light-burned magnesia, etc., and then roasting at high temperature. White coal is used as fuel during roasting, and the preparation cost is high, and the synthesis effect is not ideal

Method used

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  • Method for preparing synthetic forsterite from boron slurry
  • Method for preparing synthetic forsterite from boron slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The boron mud composition used contains SiO by weight percentage 2 28.79%, Fe 2 o 3 4.95%, Al 2 o 3 2.16%, CaO 2.09%, MgO 41.76%, B 2 o 3 1.22%, the balance is the loss on ignition and a small amount of impurities; the particle size is 100~200 mesh;

[0029] Grinding natural forsterite into fine powder of 150~240 mesh;

[0030] Grind the light-burned magnesia into a fine powder of 150-240 mesh;

[0031] Add the ground light-burned magnesia powder and natural forsterite powder into boron mud to make a mixed material, and the amount added is boron mud: natural forsterite powder: light-burned magnesia powder=1:0.2: 0.8;

[0032] Add binding agent magnesium chloride and mix uniformly in the mixed material, obtain combined material, the add-on of magnesium chloride is 2% of mixed material gross weight;

[0033] Add water to the combined material and mix evenly. The amount of water added is 15% of the total weight of the combined material, and then pressed into a ...

Embodiment 2

[0037] The composition of the boron mud used contains SiO by weight percentage 2 25.12%, Fe 2 o 3 5.78%, Al 2 o 3 3.97%, CaO 1.01%, MgO 44.65%, B 2 o 3 4.02%, the remainder is loss on ignition and a small amount of impurities; particle size is 100~200 mesh;

[0038] Grinding natural forsterite into fine powder of 150~240 mesh;

[0039] Grind the light-burned magnesia into a fine powder of 150-240 mesh;

[0040] The ground light-burned magnesia powder and natural forsterite powder are added to boron mud to make a mixed material, and the amount added is boron mud: natural forsterite powder: light-burned magnesia powder=1:0.16: 0.5;

[0041] Add binder magnesium chloride and mix uniformly in the mixed material, obtain combined material, the add-on of magnesium chloride is 1% of mixed material gross weight;

[0042] Add water to the combined material and mix evenly. The amount of water added is 14% of the total weight of the combined material, and then pressed into a sp...

Embodiment 3

[0046] The composition of the boron mud used contains SiO by weight percentage 2 29.45%, Fe 2 o 3 3.12%, Al 2 o 3 1.14%, CaO 2.84%, MgO 35.92%, B 2 o 3 4.61%, the balance is the loss of ignition components and a small amount of impurities; the particle size is 100~200 mesh;

[0047] Grinding natural forsterite into fine powder of 150~240 mesh;

[0048] Grind the light-burned magnesia into a fine powder of 150-240 mesh;

[0049] Add the finely ground light-burned magnesia powder and natural forsterite powder into boron mud to make a mixed material, and the amount added is boron mud: natural forsterite powder: light-burned magnesia powder=1:0.3: 0.7;

[0050] Add binding agent magnesium chloride and mix uniformly in the mixed material, obtain combined material, the add-on of magnesium chloride is 2% of mixed material gross weight;

[0051] Add water to the combined material and mix evenly. The amount of water added is 13% of the total weight of the combined material,...

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Abstract

The invention discloses a method for preparing synthetic forsterite from boron slurry. The method comprises the following steps of 1, adding lightly roasted magnesia powder and natural forsterite powder into boron slurry to obtain a mixed material, 2, adding a binder into the mixed material and mixing uniformly to obtain a bound material, 3, adding water into the bound material, mixing uniformly, pressing the mixture into globular materials by a ball press, and standing for maintenance, and 4, mixing the maintained globular materials and coal, putting the mixture into a high-temperature vertical kiln, heating to a temperature of 1550 to 1650 DEG C, and carrying out heat preservation for 3 to 4 hours to obtain the synthetic forsterite. The method has simple and reliable processes and solves the problem of the pollution produced by boron slurry on the ecological environment. The synthetic forsterite prepared by the method contains more than 60% of magnesium oxide.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a method for preparing synthetic forsterite by utilizing boron mud. Background technique [0002] Borax mud is the waste residue produced in the production of borax. Its color is light brown, and it is an insoluble substance. It has a certain viscosity and good plasticity. The relative density is 2.3g / cm 3 , bulk density 1.8g / cm 3 , the particle size is about 150 mesh, and the newly produced boron mud contains about 30% free water. Boron mud is alkaline, with a pH of 8-10. Boron mud contains alkaline substances such as magnesium oxide, calcium oxide, and sodium oxide. Where the boron mud is discharged, no grass can grow, and its lye can dissolve into the groundwater, reducing the production of the surrounding farmland, and in severe cases, it can cause the crops to fail and pollute the surrounding drinking water. Due to the fine particles of boron mud, after losing moisture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/26
Inventor 聂旺发丁海威
Owner 聂旺发
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