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Low-intensity magnesium brick and production method thereof

A production method and technology of magnesia bricks, which are applied in the field of low-strength magnesia bricks and its production, can solve the problems of kiln heat loss, waste of saw blades, and low porosity, so as to reduce labor intensity, improve work efficiency, reduce The effect of heat loss

Active Publication Date: 2011-09-28
海城利尔麦格西塔材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Now the strength of mid-range magnesia bricks (MZ-95B) produced according to national standards is usually very high (all are fired with MgO≥95% or 94.5% mid-grade magnesia, MgO≥94.5%, compressive strength≥60MPa, 0.2MPa load Softening temperature T0.6≥1650℃, bulk density≥2.96g / cm3, apparent porosity≤18%), and the permanent lining of the converter is generally built with this kind of mid-grade magnesia bricks, which is very Difficult (time-consuming, electricity-consuming, saw blade-consuming, manpower-consuming), and due to the high volume density, low apparent porosity and poor thermal insulation performance, resulting in heat loss of the kiln

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A low-strength magnesia brick, which is made of the following raw materials in proportions by weight:

[0028] 95 parts of mid-grade magnesia with MgO≥95%

[0029] MgO≥97% high-purity light-burned magnesium oxide 5 parts

[0030] 3 servings of pulp.

[0031] The particle size distribution of the mid-range magnesia with MgO≥95% is as follows:

[0032] 3-5mm 30 copies

[0033] 1-3mm 25 parts

[0034] 0.088-1mm 30 copies

[0035] The sum of the addition amount of MgO≥95% medium-grade magnesia with a particle size of 0-0.088mm and MgO≥97% high-purity light-burned magnesia with a particle size of 0-0.088mm is 25 parts, of which the particle size is 0-0.088mm The addition amount of MgO≥97% high-purity light-burned magnesia is 5 parts.

[0036] The production method of described low-strength magnesia brick is:

[0037] Firstly, the mid-grade magnesia is crushed, sieved, and finely ground, and the high-purity light-burned magnesia is finely ground into powder, and the in...

Embodiment 2

[0048] A low-strength magnesia brick, which is made of the following raw materials in proportions by weight:

[0049] 90 parts of mid-grade magnesia with MgO≥95%

[0050] MgO≥97% high-purity light-burned magnesium oxide 10 parts

[0051] 3 servings of pulp.

[0052] The particle size distribution of the mid-grade magnesia with MgO≥95% is, in parts by weight:

[0053] 3-5mm 20 parts

[0054] 1-3mm 30 copies

[0055] 0.088-1mm 25 copies

[0056] The sum of the addition amount of MgO≥95% medium-grade magnesia with a particle size of 0-0.088mm and MgO≥97% high-purity light-burned magnesia with a particle size of 0-0.088mm is 20 parts, of which the The addition amount of MgO≥97% high-purity light-burned magnesia is 1 part.

[0057] The production method of the described low-strength magnesia brick is the same as in Example 1.

Embodiment 3

[0059] A low-strength magnesia brick, which is made of the following raw materials in proportions by weight:

[0060] 99 parts of mid-grade magnesia with MgO≥95%

[0061] MgO≥97% high-purity light-burned magnesium oxide 1 part

[0062] 3 servings of pulp.

[0063] The particle size distribution of the mid-grade magnesia with MgO≥95% is, in parts by weight:

[0064] 3-5mm 40 parts

[0065] 1-3mm 20 copies

[0066] 0.088-1mm 35 parts

[0067]The sum of the addition amount of MgO≥95% medium-grade magnesia with a particle size of 0-0.088mm and MgO≥97% high-purity light-burned magnesia with a particle size of 0-0.088mm is 30 parts, of which the The addition amount of MgO≥97% high-purity light-burned magnesia is 10 parts.

[0068] The production method of the described low-strength magnesia brick is the same as in Example 1.

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Abstract

The invention relates to a low-strength magnesite brick and a production method thereof. The brick is made from the following materials by weight: 90-99 parts of medium magnesia containing not less than 95% MgO, 1-10 parts of high-purity light burned magnesia containing not less than 97% MgO, and 3 parts of pulp. A finished product is finally made by batching at the proportions, mixing, forming, drying, burning, sorting and the like. The low-strength magnesite brick has lower compression strength, easy cutting, lower bulk density, higher macro porosity and good insulating property, which effectively lowers heat loss of a kiln.

Description

technical field [0001] The invention relates to a low-strength magnesia brick and a production method thereof. Background technique [0002] Now the strength of mid-range magnesia bricks (MZ-95B) produced according to national standards is usually very high (all are fired with MgO≥95% or 94.5% mid-grade magnesia, MgO≥94.5%, compressive strength≥60MPa, 0.2MPa load Softening temperature T0.6≥1650℃, bulk density≥2.96g / cm3, apparent porosity≤18%), and the permanent lining of the converter is generally built with this kind of mid-grade magnesia bricks, which is very Difficult (time-consuming, electricity-consuming, saw-blade-consuming, manpower-consuming), and due to the high bulk density and low apparent porosity, the thermal insulation performance is not good, resulting in the heat loss of the kiln. Contents of the invention [0003] The invention overcomes the deficiencies in the prior art and provides a low-strength magnesia brick and a production method thereof. The low-...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 王相丰王生
Owner 海城利尔麦格西塔材料有限公司
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