Forsterite synthesis method

A technology of forsterite and synthesis method, which is applied in the field of materials, can solve problems such as environmental pollution, high preparation cost, and unsatisfactory synthesis effect, achieve less impurity content, improve refractoriness and load softening temperature, and solve environmental and ecological problems pollution effect

Inactive Publication Date: 2018-03-13
董少明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of one ton of borax will produce 3~4 tons of boron mud. Over the years, a large amount of boron mud has been accumulated, which has caused great environmental pollution problems.
[0003] 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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add light-burned magnesia powder and natural forsterite powder with a particle size of 150 to 240 meshes into boron mud to make a mixed material, and the amount added is boron mud: natural forsterite powder: light-burned magnesia powder=1 :0.1:0.5;

[0018] Add 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; Then add water and mix homogeneously, the add-on of water is 8% of combined material gross weight, then press Press the ball machine into a spherical material, and the pressure during pressing is 45±5 MPa; then the spherical material is kept for 20 hours;

[0019] The cured spherical material is mixed with coal and placed in a high-temperature shaft kiln. The ratio of fuel to billet is 3:1 by weight, and then heated to 1520°C for 3 hours for high-temperature calcination to make forsterite.

Embodiment 2

[0021] Add light-burned magnesia powder and natural forsterite powder with a particle size of 150 to 240 meshes into boron mud to make a mixed material, and the amount added is boron mud: natural forsterite powder: light-burned magnesia powder=1 :0.2:0.6;

[0022] Add 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; Then add water and mix homogeneously, the add-on of water is 9% of combined material gross weight, then press The ball machine is pressed into spherical materials, and the pressure during pressing is 45±5 MPa; then the spherical materials are kept for 15 hours;

[0023] The cured spherical material is mixed with coal and placed in a high-temperature shaft kiln. The ratio of fuel to billet is 5:1 by weight, and then heated to 1500°C for 4 hours for high-temperature calcination to make forsterite.

Embodiment 3

[0025] Add light-burned magnesia powder and natural forsterite powder with a particle size of 150 to 240 meshes into boron mud to make a mixed material, and the amount added is boron mud: natural forsterite powder: light-burned magnesia powder=1 :0.3:0.8;

[0026] Add magnesium chloride and mix uniformly in the mixed material, obtain combined material, the add-on of magnesium chloride is 3% of mixed material gross weight; Then add water and mix homogeneously, the add-on of water is 10% of combined material gross weight, then press The ball machine is pressed into spherical materials, and the pressure during pressing is 45±5 MPa; then the spherical materials are kept for 10 hours;

[0027] The cured spherical material is mixed with coal and placed in a high-temperature shaft kiln. The ratio of fuel to billet is 4:1 by weight, and then heated to 1510°C for 3.5 hours for high-temperature calcination to make forsterite.

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Abstract

A method for synthesizing forsterite is carried out according to the following steps: (1) lightly burned magnesia powder and natural forsterite powder with a particle size of 150-240 mesh are added to boron mud to make a mixed material; (2) Add magnesium chloride to the mixture and mix it evenly, add water and mix it evenly, press it into a spherical material, and let it stand for 10-20 hours for curing; (3) After mixing with coal, place it in a high-temperature shaft kiln for high-temperature calcination. The invention can not only treat the boron mud accumulated for many years, solve the environmental and ecological pollution of the boron mud that has been troubled for a long time, but also create a complete boron industrial chain, and find a new substitute that can meet the needs of today's increasingly scarce magnesium resources. Products, set a model for the local comprehensive and rational use of resources and the development of circular economy.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a synthesis method of forsterite. Background technique [0002] Dashiqiao area is one of the main production areas of borides in my country, and borax enterprises have a history of nearly 50 years. The borax production line in the Dashiqiao area is produced by the carbon-soda method. The process is: mix the roasted boron mineral (90% through 150 mesh) with the lye at a solid-liquid ratio of 1.4~1.6, make a slurry, and put it into In the carbonization kettle, heat up to 125~135°C, pass in carbon dioxide, control the pressure at about 0.6MPa, react for 12~24 hours, and then carry out solid-liquid separation in the filter, and the filtrate is crystallized and centrifuged to obtain 95% borax. After drying by gas, 99.5% borax is obtained, and the filter cake is boron mud. The production of one ton of borax will produce 3 to 4 tons of boron mud, and a large amount of boron mud has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/20C04B35/622
CPCC04B35/20C04B35/62204
Inventor 董少明
Owner 董少明
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