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Preparation method of magnesium calcium clinker

A technology of clinker and magnesium-calcium, which is applied in the field of preparation of magnesium-calcium clinker, can solve the problems that magnesite powder cannot be used, and achieve the effects of promoting reasonable and efficient comprehensive utilization, improving the quality of clinker, and reducing production costs

Inactive Publication Date: 2007-01-31
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the technical defects of the existing production of magnesium-calcium clinker and the current situation that magnesite powder cannot be used, the present invention provides a preparation method of magnesium-calcium clinker with high purity, high density and low firing temperature

Method used

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  • Preparation method of magnesium calcium clinker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Liaoning Dashiqiao abandoned magnesite powder (particle size range 0.001-40mm) and Zhejiang Hangzhou limestone ore were used as raw materials, and the chemical composition is shown in Table 1.

[0035] MgO

CaO

SiO 2

Al 2 O 3

Fe 2 O 3

LOI

magnesite

46.56

0.41

1.38

0.25

0.47

50.92

limestone

0.08

55.08

0.28

0.75

0.04

43.65

[0036] ① Lightly burn. In a rotary kiln, a suspension roasting kiln, a multi-layer furnace, a boiling furnace or a reverberatory furnace, the above-mentioned raw materials are added, and ashless fuel is used for light burning at 1000 ° C for 1 hour.

[0037] ② Cool down. The lightly burned minerals are naturally cooled to 100°C in the air.

[0038] ③ Hydration. The cooled light-burned magnesia and light-burned lime are proportioned according to a certain metering ratio, so that the CaO content accounts for 15% of the ...

Embodiment 2

[0047] The magnesite powder and limestone ore used in Example 1 were used as raw materials.

[0048] ① Lightly burn. In a rotary kiln, a suspension roasting kiln, a multi-layer furnace, a boiling furnace or a reverberatory furnace, the above-mentioned raw materials are added, and ashless fuel is used for light burning at 800 ° C for 2 hours.

[0049] ② Cool down. The lightly burned minerals are naturally cooled to 100°C in the air.

[0050] ③ Hydration. The cooled light-burned magnesia and light-burned lime are proportioned according to a certain metering ratio, so that the CaO content accounts for 15% of the total minerals by weight percentage. Put the weighed two minerals together into room temperature water 4 times the volume of the minerals, and hydrate for 40 minutes to hydrate the MgO in the minerals.

[0051] ④ The materials obtained in the above step ③, including minerals and water, are directly added to the ball mill, and ball milled for 2 hours.

[0052] ⑤ Filter....

Embodiment 3

[0059] The magnesite powder and limestone ore used in Example 1 were used as raw materials.

[0060] ① Lightly burn. In a rotary kiln, suspension roasting kiln, multi-layer furnace, boiling furnace or reverberatory furnace, the above-mentioned raw materials are added, and ashless fuel is used for light burning at 900 ° C for 1.5 hours.

[0061] ② Cool down. The lightly burned minerals are naturally cooled to 150°C in the air.

[0062] ③ Hydration. The cooled light-burned magnesia and light-burned lime are batched according to a certain metering ratio, so that the CaO content accounts for 25% of the total minerals by weight percentage. Put the weighed two minerals together into room temperature water 4 times the volume of the minerals, and hydrate for 20 minutes to hydrate the MgO in the minerals.

[0063] ④ The materials obtained in the above step ③, including minerals and water, are directly added to the ball mill, and ball milled for 2 hours.

[0064] ⑤ Filter. Filter ...

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Abstract

The present invention relates to a preparation method of calcium-magnesium clinker. Said method includes the following steps: using magnesite and limestone as raw material, soft burning at 800-100deg.C, cooling, hydration, ball-grinding and wet mixing, filtering, carbonating, drying, forming and calcining at 1600-1900deg.C so as to obtain the invented calcium-magnesium clinker.

Description

technical field [0001] The invention relates to the technical field of production of refractory materials, in particular to a preparation method of magnesium-calcium clinker. Background technique [0002] In recent years, with the requirements for pure steel smelting, the use environment of refractory materials has become increasingly harsh (such as high operating temperature, long refining cycle, etc.). The alkaline oxide materials containing free calcium oxide have good high temperature stability and good purification. The effect of molten steel has been widely valued. Among them, magnesia-calcium refractories are widely used as refractories for refining equipment, and magnesia-calcium clinker is the main raw material for the production of this magnesia-calcium refractory. [0003] The traditional method of producing magnesia-calcium clinker firstly uses magnesite and limestone as raw materials, and lightly burns these two minerals at lower temperatures to obtain lightly b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B9/11
Inventor 陈敏王楠于景坤姜茂发陆彩云
Owner NORTHEASTERN UNIV
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