阅读说明：本技术 一种镁铬砖的生产方法 (Production method of magnesia-chrome brick ) 是由 张义先 刘琳琳 赵现华 金钊 侯中阳 尹斌 于 2020-12-07 设计创作，主要内容包括：本发明涉及一种镁铬砖的生产方法,在普通镁铬砖和直接烧结镁铬砖制备过程中分别添加氧化铁黄和氧化铁蓝使成品砖具有可区分的不同颜色,普通镁铬砖烧成温度为1520-1580℃,成品砖带有黄色；直接结合镁铬砖烧成温度为1680-1750℃；成品砖带有蓝色。本发明制备的镁铬砖性能符合要求,同时使不易区分的同质砖具有可区分性,在砌筑现场容易区分,方便施工,避免砌筑位置发生错误。(The invention relates to a method for producing a magnesia-chrome brick, which comprises the steps of respectively adding iron oxide yellow and iron oxide blue in the preparation processes of a common magnesia-chrome brick and a directly sintered magnesia-chrome brick to ensure that a finished brick has different distinguishable colors, wherein the firing temperature of the common magnesia-chrome brick is 1520-minus 0 ℃, and the finished brick has yellow color; directly combining the magnesite-chrome brick to sinter at 1680-1750 ℃; the finished brick is blue. The performance of the magnesia-chrome brick prepared by the method meets the requirement, and simultaneously, the homogeneous brick which is difficult to distinguish has differentiability, is easy to distinguish in a building site, is convenient to construct, and avoids errors in building positions.)

1. A method for producing a magnesite-chrome brick is characterized in that iron oxide yellow and iron oxide blue are respectively added in the preparation processes of a common magnesite-chrome brick and a directly sintered magnesite-chrome brick to ensure that the finished brick has different distinguishable colors, and specifically comprises the following steps:

one kind of common magnesia-chrome brick

1) Raw materials: chromium ore: 25-35 parts of 2-4mm, 10-15 parts of 1-2mm and 20-30 parts of 0-1 mm; 96 parts of fused magnesite: 30-45 parts of 3-5mm, 10-20 parts of 1-3mm, 15-35 parts of 0-1mm and 20-35 parts of 200 meshes; al (Al)₂O₃1-3 parts of micro powder; binding agent: 5-10 parts of starch and 3-5 parts of dextrin;

2) adding the raw materials into iron oxide yellow, and then uniformly mixing;

3) after discharging, molding by using a brick press;

4) putting the green bricks into a drying kiln for drying for 10-20 hours, and then putting the green bricks into a tunnel kiln for firing at the temperature of 1520 and 1580 ℃, wherein the finished bricks are yellow;

two, directly combined magnesia-chrome brick

1) Raw materials: chromium concentrate: 20-35 parts of 2-4mm, 10-15 parts of 1-2mm and 15-30 parts of 0-1 mm; 97 electric smelting magnesite: 30-45 parts of 3-5mm, 10-20 parts of 1-3mm, 15-35 parts of 0-1mm and 20-35 parts of 200 meshes; al (Al)₂O₃1-3 parts of micro powder; binding agent: 5-10 parts of starch and 3-5 parts of dextrin;

2) adding iron oxide blue into the raw materials, and then uniformly mixing;

3) after discharging, molding by using a brick press;

4) putting the green bricks into a drying kiln for drying for 10-20 hours, and then putting the green bricks into a tunnel kiln for firing at 1680-1750 ℃; the finished brick is blue.

Technical Field

The invention relates to the field of refractory materials, in particular to a production method of a magnesia-chrome brick.

Background

The magnesia-calcium brick is a magnesia refractory material which takes periclase and diaspore as main crystal phases and dicalcium silicate as a secondary crystal phase. The microstructure is characterized in that periclase is directly contacted with dicalcium silicate and tricalcium silicate, eutectic (4 CaO. Al2O 3. Fe2O3 is in a fine vein shape and is filled in crystal gaps between dicalcium silicate and tricalcium silicate, the magnesia-chrome bricks comprise common bricks and are directly combined with the bricks, and finished bricks are not easy to distinguish.

Disclosure of Invention

The invention aims to solve the technical problem of providing a production method of a magnesia-chrome brick, which is easy to distinguish finished bricks and is convenient for kiln masonry to correctly select adobes.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for producing magnesia chrome bricks, which adds iron oxide yellow and iron oxide blue respectively in the preparation process of common magnesia chrome bricks and direct sintering magnesia chrome bricks to make the finished bricks have different distinguishable colors, specifically comprises the following steps:

one kind of common magnesia-chrome brick

1) Raw materials: chromium ore: 25-35 parts of 2-4mm, 10-15 parts of 1-2mm and 20-30 parts of 0-1 mm; 96 parts of fused magnesite: 30-45 parts of 3-5mm, 10-20 parts of 1-3mm, 15-35 parts of 0-1mm and 20-35 parts of 200 meshes; al (Al)₂O₃1-3 parts of micro powder; binding agent: 5-10 parts of starch and 3-5 parts of dextrin;

2) adding the raw materials into iron oxide yellow, and then uniformly mixing;

3) after discharging, molding by using a brick press;

4) putting the green bricks into a drying kiln for drying for 10-20 hours, and then putting the green bricks into a tunnel kiln for firing at the temperature of 1520 and 1580 ℃, wherein the finished bricks are yellow;

two, directly combined magnesia-chrome brick

1) Raw materials: chromium concentrate: 20-35 parts of 2-4mm, 10-15 parts of 1-2mm and 15-30 parts of 0-1 mm; 97 electric smelting magnesite: 30-45 parts of 3-5mm, 10-20 parts of 1-3mm, 15-35 parts of 0-1mm and 20-35 parts of 200 meshes; al (Al)₂O₃1-3 parts of micro powder; binding agent: 5-10 parts of starch and 3-5 parts of dextrin;

2) adding iron oxide blue into the raw materials, and then uniformly mixing;

3) after discharging, molding by using a brick press;

4) putting the green bricks into a drying kiln for drying for 10-20 hours, and then putting the green bricks into a tunnel kiln for firing at 1680-1750 ℃; the finished brick is blue.

Compared with the prior art, the invention has the beneficial effects that:

the performance of the magnesia-chrome brick prepared by the method meets the requirement, and simultaneously, the homogeneous brick which is difficult to distinguish has differentiability, is easy to distinguish in a building site, is convenient to construct, and avoids errors in building positions.

Detailed Description

The invention is further illustrated by the following examples:

the following examples describe the invention in detail. These examples are merely illustrative of the best embodiments of the present invention and do not limit the scope of the invention.

A method for producing magnesia chrome bricks, which adds iron oxide yellow and iron oxide blue respectively in the preparation process of common magnesia chrome bricks and direct sintering magnesia chrome bricks to make the finished bricks have different colors for distinguishing, specifically comprises the following steps:

one kind of common magnesia-chrome brick

1) Raw materials: chromium ore: 25-35 parts of 2-4mm, 10-15 parts of 1-2mm and 20-30 parts of 0-1 mm; 96 parts of fused magnesite: 30-45 parts of 3-5mm, 10-20 parts of 1-3mm, 15-35 parts of 0-1mm and 20-35 parts of 200 meshes; al (Al)₂O₃1-3 parts of micro powder; binding agent: 5-10 parts of starch and 3-5 parts of dextrin;

2) adding the raw materials into iron oxide yellow, and then uniformly mixing;

3) after discharging, molding by using a brick press;

4) putting the green bricks into a drying kiln for drying for 10-20 hours, and then putting the green bricks into a tunnel kiln for firing at the temperature of 1520 and 1580 ℃, wherein the finished bricks are yellow;

two, directly combined magnesia-chrome brick

1) Raw materials: chromium concentrate: 20-35 parts of 2-4mm, 10-15 parts of 1-2mm and 15-30 parts of 0-1 mm; 97 electric smelting magnesite: 30-45 parts of 3-5mm, 10-20 parts of 1-3mm, 15-35 parts of 0-1mm and 20-35 parts of 200 meshes; al (Al)₂O₃1-3 parts of micro powder; binding agent: 5-10 parts of starch and 3-5 parts of dextrin;

2) adding iron oxide blue into the raw materials, and then uniformly mixing;

3) after discharging, molding by using a brick press;

4) putting the green bricks into a drying kiln for drying for 10-20 hours, and then putting the green bricks into a tunnel kiln for firing at 1680-1750 ℃; the finished brick is blue.

The invention is convenient to distinguish homogeneous bricks and avoids the phenomenon of brick mixing in construction sites.