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Dead-burned magnesite shaft kiln raw material homogenization process

A dead-burned magnesia and shaft kiln technology, applied in the field of refractory materials, can solve problems such as waste of magnesium resources, achieve the effects of improving density, solving uneven sintering, and saving magnesite resources

Active Publication Date: 2020-06-26
海城市军刚中档镁砂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of the prior art and solve the problem of waste of low-grade magnesite magnesium resources such as high-calcium magnesite powder ore, crushed ore, high-silicon magnesite powder ore, and crushed ore, the invention provides a dead-burned magnesite Shaft kiln raw material homogenization process, using high-calcium magnesite powder ore, crushed ore and high-silicon magnesite powder ore, crushed ore as raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Put 26 parts of natural high-calcium magnesite powder ore and crushed ore with a particle size of 0~30mm, 74 parts of natural high-silicon magnesite powder ore and crushed ore with a particle size of 0~30mm, and 15 parts of coke or Ningxia white coal in the crusher Separately crush to 200~325 meshes to get natural high-calcium magnesite powder, natural high-silicon magnesite powder, coke or Ningxia white coal powder; put all the natural high-calcium magnesite powder and natural high-silicon magnesite powder into the mix In the homogenization tank, mix at room temperature for 5 minutes and rotate at a speed of 40r / min to obtain a primary homogenized material; put the primary homogenized material into a briquetting machine and press it into a magnesia ball with a diameter of 40mm at 3Mpa; mix the magnesia ball with all Put the fuel in the formula quantity into the mixing and homogenizing tank together, mix at room temperature for 5 minutes, and rotate at a speed of 40r / min...

Embodiment 2

[0023] Put 35 parts of natural high-calcium magnesite powder ore and crushed ore with a particle size of 0~30mm, 65 parts of natural high-silicon magnesite powder ore and crushed ore with a particle size of 0~30mm and 20 parts of coke or Ningxia white coal in the crusher Separately crush to 200~325 meshes to get natural high-calcium magnesite powder, natural high-silicon magnesite powder, coke or Ningxia white coal powder; put all the natural high-calcium magnesite powder and natural high-silicon magnesite powder into the mix In the homogenizing tank, mix at room temperature for 8 minutes and rotate at 40r / min to obtain a primary homogenized material; put the primary homogenized material into a briquetting machine and press it into a magnesia ball with a diameter of 50mm at 5Mpa; mix the magnesia ball with all Put the fuel in the formula quantity into the mixing and homogenizing tank together, mix at room temperature for 8 minutes, and rotate at a speed of 40r / min to obtain the...

Embodiment 3

[0026] Put 42 parts of natural high-calcium magnesite powder ore and crushed ore with a particle size of 0~30mm, 58 parts of natural high-silicon magnesite powder ore and crushed ore with a particle size of 0~30mm, and 25 parts of coke or Ningxia white coal in the crusher Separately crush to 200~325 meshes to get natural high-calcium magnesite powder, natural high-silicon magnesite powder, coke or Ningxia white coal powder; put all the natural high-calcium magnesite powder and natural high-silicon magnesite powder into the mix In the homogenizing tank, mix at room temperature for 10 minutes and rotate at 40r / min to obtain a primary homogenized material; put the primary homogenized material into a briquetting machine and press it into a magnesia ball with a diameter of 60mm at 8Mpa; mix the magnesia ball with all Put the fuel in the formula quantity into the mixing and homogenizing tank together, mix at room temperature for 10 minutes, and rotate at a speed of 40r / min to obtain ...

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Abstract

The invention relates to a dead-burned magnesite shaft kiln raw material homogenization process. The process comprises the steps of fine grinding, primary mixing homogenization, ball pressing, secondary mixing homogenization and sintering. Raw materials and the fuel are used. Natural high-calcium magnesite powder ore and crushed ore and natural high-silicon magnesite powder ore and crushed ore aresubjected to fine grinding and primary mixing homogenization; ball pressing is performed on a primarily mixed and homogenized material; and secondary mixing homogenization is performed on a ball pressing material and a fuel; and finally, the secondary mixing homogenization material is sintered at a temperature of 1500-1800 DEG C to prepare dead-burned magnesite. The method disclosed by the invention has the advantages of simple process flow, high product density and the like; and due to the existence of the high-melting-point forsterite phase, the high-temperature resistance and corrosion resistance of the refractory material can be improved.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a raw material homogenization process for a dead-burned magnesia shaft kiln. Background technique [0002] Dead-burned magnesia is the main raw material for the production of magnesia refractory products. Its sintering performance, especially the bulk density, has an important impact on the slag intrusion resistance and high-temperature mechanical properties of refractory products, and directly affects the service life of refractory materials. [0003] At present, natural magnesite is usually used to produce dead-burned magnesia. The raw materials of dead-burned magnesite are all ore lumps with a particle size of 30-120 mm. After being put into a high-temperature shaft kiln, coal or coke is used as fuel, and the temperature is controlled at 1500-1600 ° C. Obtain dead burnt magnesia. However, due to the inhomogeneity of raw materials and uneven distribution, the prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/12
CPCC04B2/12
Inventor 刘士军彭子钧王明夺罗旭东周晓蕾
Owner 海城市军刚中档镁砂有限公司
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