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Aluminum magnesium calcium fire-resistant clinker and preparation method thereof

A technology of refractory clinker and aluminum magnesium calcium, which is applied in the field of refractory materials, can solve the problems of large discharge after use, high production cost and high heat storage loss, and achieves small discharge, low production cost and small heat storage loss. Effect

Active Publication Date: 2015-01-28
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For existing Al 2 o 3 - In the preparation technology of MgO-CaO system refractory clinker, there are problems such as resource shortage, high production cost, high heat storage loss and large discharge after use. The present invention provides an aluminum-magnesium-calcium refractory clinker and its preparation method. Use CaO, which is rich in resources and has a low theoretical density, to replace part of the corundum, realize the "lightweight" of refractory materials, and promote the reduction of refractory raw material costs and energy saving and emission reduction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The weight content of CaO in the adopted limestone is 54.2%, and the Al in the adopted bauxite 2 o 3 The weight content of MgO is 76%, and the weight content of MgO in the magnesite used is 46.2%;

[0023] Limestone, magnesite and bauxite are respectively crushed and ground to a particle size of ≤88 mesh;

[0024] The crushed limestone, magnesite and bauxite are mixed to make a mixed material. The mixing ratio is 2.6% of the total weight of the limestone, 12.5% ​​of the total weight of the magnesite and 12.5% ​​of the total weight of the bauxite by weight percentage. 84.9% of the total weight of all materials;

[0025] Put the mixed material in a ball mill and mix evenly, and then use a ball press machine to press it into a ball under a pressure of 150MPa to obtain a green ball;

[0026] Put the raw balls in a high-temperature shaft kiln, heat them at 1350oC for 4 hours, and perform the first calcination to make primary clinker;

[0027] The primary clinker is crush...

Embodiment 2

[0030] In the limestone that adopts, bauxite and magnesite are with embodiment 1;

[0031] Limestone, magnesite and bauxite are respectively crushed and ground to a particle size of ≤88 mesh;

[0032] The crushed limestone, magnesite and bauxite are mixed to make a mixed material, and the mixing ratio is 7.7% of the total weight of the whole material by weight percentage, 15.1% of the total weight of the magnesite by magnesite, and 15.1% of the total weight of the bauxite. 77.2% of the total weight of all materials;

[0033] Put the mixed material in a ball mill and mix evenly, and then use a ball press machine to press it into a ball under a pressure of 150MPa to obtain a green ball;

[0034] Put the raw balls in a high-temperature shaft kiln, heat them at 1400oC for 2 hours, and perform the first calcination to make primary clinker;

[0035] The primary clinker is crushed and ground to a particle size of ≤88 mesh, and then pressed into balls under a pressure of 150MPa to o...

Embodiment 3

[0038] The limestone, bauxite and magnesite that adopt are with embodiment 1;

[0039] Limestone, magnesite and bauxite are respectively crushed and ground to a particle size of ≤88 mesh;

[0040] The crushed limestone, magnesite and bauxite are mixed to make a mixed material, and the mixing ratio is as follows: limestone accounts for 12.3% of the total weight of all materials, magnesite accounts for 15.0% of the total weight of all materials, and bauxite accounts for 72.7% of the total weight of all materials;

[0041] Put the mixed material in a ball mill and mix evenly, and then use a ball press machine to press it into a ball under a pressure of 150MPa to obtain a green ball;

[0042] Put the raw balls in a high-temperature shaft kiln, heat them at 1400oC for 4 hours, and perform the first calcination to make primary clinker;

[0043] The primary clinker is crushed and ground to a particle size of ≤88 mesh, and then pressed into balls under a pressure of 150MPa to obtain...

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Abstract

The invention relates to an aluminum magnesium calcium fire-resistant clinker and a preparation method thereof, and belongs to the technical field of fire-resistant materials. The aluminum magnesium calcium fire-resistant clinker comprises the following components by weight percent: 75-90% of Al2O3, 5-15% of MgO, and 2-10% of CaO. The preparation method comprises the following steps of: (1) respectively crushing and levigating limestone, magnesite and bauxite; (2) mixing so as to prepare a mixed material; (3) putting the mixed material into a ball mill, mixing uniformly, and then moulding through pressing; (4) calcining at 1350-1400 DEG C to prepare a calcination material; (5) crushing and levigating till the particle size is less than or equal to 88 mesh, and moulding again through pressing; (6) performing secondary calcining at 1650-1700 DEG C. The aluminum magnesium calcium fire-resistant clinker and the preparation method thereof have low production cost and are applicable to large-scale popularization, the prepared product has the advantages of high density, small volume density, lower water absorption and the like, and the preparation method is beneficial to realization of light weight of the fire-resistant materials, can be used for promoting energy conservation and emission reduction, and has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an aluminum-magnesium-calcium refractory clinker and a preparation method thereof. Background technique [0002] Aluminum-magnesium refractories are widely used in high-temperature furnace linings in metallurgy, cement and other industries because of their good performance in high temperature resistance, thermal shock resistance and slag erosion resistance; due to the impact of bauxite resource problems, the price of corundum raw materials The production cost and price of aluminum-magnesium refractory materials are also rising year by year; This leads to a large loss of heat storage in high-temperature furnaces, and also directly increases the discharge of refractory materials after use. [0003] Limestone is rich in resources around the world, and the quicklime obtained after calcination has a small theoretical density; if quicklime can be used to repla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 陈敏徐磊王楠
Owner NORTHEASTERN UNIV LIAONING
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