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High-performance magnesia calcia brick and preparation method thereof

A high-performance magnesia-calcium brick and magnesia-calcium sand technology, applied in the field of refractory materials, can solve the problems of weak slag erosion resistance and high apparent porosity of magnesia-calcium bricks, and achieve improved hydration resistance, bulk density, and other parameters Improved effect

Active Publication Date: 2020-11-17
LIAONING DONGHE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the patent has the following problems: after testing, the introduction of edible soybean oil into the above-mentioned binder will cause the apparent porosity of the prepared magnesia-calcium brick to be relatively high, and product sampling in the later stage found that its anti-slag erosion performance is very weak

Method used

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  • High-performance magnesia calcia brick and preparation method thereof
  • High-performance magnesia calcia brick and preparation method thereof
  • High-performance magnesia calcia brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The high-performance magnesia-calcium brick of this embodiment includes the following raw materials in parts by weight:

[0038] Magnesia calcium sand: 55 parts,

[0039] Magnesia: 30 parts,

[0040] Anhydrous binder: 3 parts,

[0041] Medium temperature sintering aid: 5 parts;

[0042] Wherein said anhydrous binder comprises urotropine, o-phenylphenol, propylene carbonate,

[0043] The weight ratio between the urotropine, the o-phenylphenol and the propylene carbonate is 1:4:2;

[0044] Wherein the medium temperature sintering aids include sodium borate, lithium feldspar, paraffin, zirconia,

[0045] The weight ratio among the sodium borate, the lithium feldspar, the paraffin and the zirconium dioxide is 2:3:1:4.

[0046] In the above-mentioned high-performance magnesia-calcium brick, the particle size of the magnesia-calcium sand is 200 mesh; the particle size of the magnesia is 200 mesh.

[0047] In the above-mentioned high-performance magnesia-calcium bricks, ...

Embodiment 2

[0059] The high-performance magnesia-calcium brick of this embodiment includes the following raw materials in parts by weight:

[0060] Magnesia calcium sand: 70 parts,

[0061] Magnesia: 20 parts,

[0062] Anhydrous binder: 5 parts,

[0063] Medium temperature sintering aid: 3 parts;

[0064] Wherein said anhydrous binder comprises urotropine, o-phenylphenol, propylene carbonate,

[0065] The weight ratio between the urotropine, the o-phenylphenol and the propylene carbonate is 1:4:2;

[0066] Wherein the medium temperature sintering aids include sodium borate, lithium feldspar, paraffin, zirconia,

[0067] The weight ratio among the sodium borate, the lithium feldspar, the paraffin and the zirconium dioxide is 2:3:1:4.

[0068] In the above-mentioned high-performance magnesia-calcium brick, the particle size of the magnesia-calcium sand is 200 mesh; the particle size of the magnesia is 200 mesh.

[0069] In the above-mentioned high-performance magnesia-calcium bricks, th...

Embodiment 3

[0081] The high-performance magnesia-calcium brick of this embodiment includes the following raw materials in parts by weight:

[0082] Magnesia calcium sand: 62 parts,

[0083] Magnesia: 25 parts,

[0084] Anhydrous binder: 4 parts,

[0085] Medium temperature sintering aid: 4 parts;

[0086] Wherein said anhydrous binder comprises urotropine, o-phenylphenol, propylene carbonate,

[0087] The weight ratio between the urotropine, the o-phenylphenol and the propylene carbonate is 1:4:2;

[0088] Wherein the medium temperature sintering aids include sodium borate, lithium feldspar, paraffin, zirconia,

[0089] The weight ratio among the sodium borate, the lithium feldspar, the paraffin and the zirconium dioxide is 2:3:1:4.

[0090] In the above-mentioned high-performance magnesia-calcium brick, the particle size of the magnesia-calcium sand is 200 mesh; the particle size of the magnesia is 200 mesh.

[0091] In the above-mentioned high-performance magnesia-calcium bricks, ...

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Abstract

The invention discloses a high-performance magnesia calcia brick and a preparation method thereof, and belongs to the technical field of refractory materials. The high-performance magnesia calcia brick is prepared from the following raw materials: dead burned high-calcium magnesite, magnesia, an anhydrous binding agent and a medium-temperature sintering aid. The preparation method comprises the following steps: (1) mixing and grinding: selecting the dead burned high-calcium magnesite, the magnesia, the anhydrous binding agent and the medium-temperature sintering aid according to the required weight part ratio for burdening, and then transferring the materials into a mixing and grinding machine for grinding treatment; (2) molding: pouring the mixed and ground material into a mold, and carrying out compression molding by adopting a brick press to prepare a green brick; and (3) drying: putting the molded green brick into a drying kiln for curing, thereby obtaining the finished product after curing. Experiments prove that the apparent porosity of the high-performance magnesia calcia brick is reduced, and hydration resistance, slag corrosion resistance, product quality and the grade ofthe high-performance magnesia calcia brick are improved.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a high-performance magnesia-calcium brick and a preparation method thereof. Background technique [0002] With the continuous development of domestic stainless steel and clean steel, the secondary refining in the steelmaking process is extremely important in the production of these high-grade steel types, and it is especially important for the performance of refractory materials under high temperature conditions, the service life of furnace linings, and molten steel during refining. The prevention of secondary pollution and the impact of used refractory materials on the environment have put forward higher requirements. Magnesia-calcium bricks are widely used as clean refractory materials due to their good high-temperature performance, and are considered to be the refractory materials that have the least pollution to molten steel and can even purify molten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/64C04B35/632
CPCC04B35/66C04B35/64C04B35/632C04B2235/3208C04B2235/3206C04B2235/3409C04B2235/3472C04B2235/3244C04B2235/77C04B2235/96
Inventor 毕胜民毕一明董宝华孙希忠赵权秦楠钟刚王飞王耶贾明鑫赵蔚
Owner LIAONING DONGHE NEW MATERIAL CO LTD
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