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Preparing method for magnesium synthetic material

A technology of synthetic materials and magnesium, applied in the field of refractory materials, can solve the problems of low density and poor hydration resistance, and achieve the effect of large contact interface, good hydration resistance and large contact area

Active Publication Date: 2017-03-22
北京利尔高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a preparation method of a magnesium composite material, which solves the problems of low density and poor hydration resistance of the existing magnesium composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment provides a method for preparing magnesium synthetic material, including the following steps:

[0024] (1) Fully grind light-burned magnesia calcium powder to achieve a particle size of less than 20um, and fully grind iron red to achieve a particle size of 30-50 microns;

[0025] (2) The fine powder obtained in step (1) and the finely ground iron red powder are co-milled, and the active nano-calcium carbonate is uniformly added during the co-grinding process. The addition amount of the active nano-calcium carbonate is fine powder and finely ground iron 4% of the weight of the red powder;

[0026] (3) Put the fine powder obtained in step (2) into a high-speed roller compactor, and add water with a mass ratio of 20% to the raw material. After stirring, the temperature from the heating temperature is ≥40℃; the amount of water added 20% of the weight of the co-milled powder;

[0027] (4) The wet powder obtained in step (3) is compacted by a ball press and pressed in...

Embodiment 2

[0032] This embodiment provides a method for preparing magnesium synthetic material, including the following steps:

[0033] (1) Fully grind light-burned magnesia calcium powder to achieve a particle size of less than 20um, and fully grind iron red to achieve a particle size of 30-50 microns;

[0034] (2) The fine powder obtained in step (1) and the finely ground iron red powder are co-milled, and the active nano-calcium carbonate is uniformly added during the co-grinding process. The addition amount of the active nano-calcium carbonate is fine powder and finely ground iron 1% of the weight of the red powder;

[0035] (3) Put the fine powder obtained in step (2) into a high-speed roller compactor, and add water with a mass ratio of 20% to the raw material. After stirring, the temperature from the heating temperature is ≥40℃; the amount of water added 15% of the weight of the co-milled powder;

[0036] (4) The wet powder obtained in step (3) is compacted by a ball press and pressed in...

Embodiment 3

[0041] This embodiment provides a method for preparing magnesium synthetic material, including the following steps:

[0042] (1) Fully grind light-burned magnesia calcium powder to achieve a particle size of less than 20um, and fully grind iron red to achieve a particle size of 30-50 microns;

[0043] (2) The fine powder obtained in step (1) and the finely ground iron red powder are co-milled, and the active nano-calcium carbonate is uniformly added during the co-grinding process. The addition amount of the active nano-calcium carbonate is fine powder and finely ground iron 8% of the weight of the red powder;

[0044] (3) Put the fine powder obtained in step (2) into a high-speed roller compactor, and add water with a mass ratio of 20% to the raw material. After stirring, the temperature from the heating temperature is ≥40℃; the amount of water added 16% of the weight of the co-milled powder;

[0045] (4) The wet powder obtained in step (3) is compacted by a ball press and pressed in...

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Abstract

The invention discloses a preparing method for a magnesium synthetic material. The preparing method comprises the following steps that light roasting magnesium calcium powder is subjected to sufficient fine grinding, light roasting calcium magnesium fine powder is obtained, and in addition, iron oxide red is subjected to sufficient fine grinding; the obtained fine powder and finely ground iron oxide red are subjected to co-grinding, and activated nano calcium carbonate is evenly added in the co-grinding process; water is added in the co-grinding fine powder, the mixture is placed in a rolling machine to be subjected to stirring and wheel rolling, stirring is uniform, and the press heating temperature is larger than or equal to 40 DEG C; wet powder is added in a ball pressing machine to be compacted, and ball blanks are manufactured in the ball pressing process; the obtained ball blanks are naturally dried; and the obtained dry blanks are placed in a kiln to be fired, the firing temperature ranges from 1,600 DEG C to 1,700 DEG C, heat preservation is conducted for 2-6 h, and the magnesium synthetic material is obtained. According to the preparing method, the magnesium synthetic material can be manufactured at the relatively low firing temperature and the short firing time, coal consumption is effectively reduced, the production cost is controlled, sufficient sintering of the magnesium synthetic material is guaranteed as well, and the firing compactness of the magnesium synthetic material is improved.

Description

Technical field [0001] The invention relates to the technical field of refractory materials, in particular to a method for preparing a magnesium synthetic material. Background technique [0002] The main minerals of magnesia synthetic materials, calcium oxide and magnesium oxide, are substances with extremely high melting points and high chemical stability; the early stage of dolomite ore or magnesite sintering is mainly controlled by the heat transfer process, and the heat of the sample is sintered from the outside to the inside. In the heat transfer process, the surface of the particles decomposes first when heated, and at the same time releases CO 2 Highly active microcrystals are formed, and when heat is transferred to the internal particles over a period of time, the surface high-active microcrystalline particles will sinter due to the long heating time, forming a hard shell with a certain strength and retaining the magnesite structure, the so-called " "Mother salt illusion"...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/057C04B35/043C04B35/66C04B35/626
CPCC04B35/043C04B35/057C04B35/6261C04B35/66C04B2235/3272C04B2235/442C04B2235/5454C04B2235/77
Inventor 赵现华刘丽于九利赵现堂赵伟胡玲军李朝云任林曹仁锋车晓梅刘美荣张晓波王团收郭钰龙王次明
Owner 北京利尔高温材料股份有限公司
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