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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 rational and efficient comprehensive utilization, promoting the improvement of purity, and improving the quality of clinker

Inactive Publication Date: 2008-02-20
NORTHEASTERN UNIV LIAONING
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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] The discarded magnesite powder ore (grain size range 0.001-40mm) in Dashiqiao, Liaoning and limestone ore in Hangzhou, Zhejiang were used as raw materials, and its chemical composition is shown in Table 1.

[0035] Table 1 implements the physical and chemical index (%) with magnesite fine ore

[0036] 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

[0037] ①Light burn. In the rotary kiln, suspension roasting kiln, multi-layer furnace, fluidized fluidized furnace or reverberatory furnace, add the above raw materials, and use ash-free fuel to lightly burn at 1000°C for 1 hour.

[0038] ② cooling. The lightly burned minerals are naturally cooled to 100°C in the air.

[0039] ③ Hydration. The cooled light-burned magnesia and light-burned lime are mixed according to a...

Embodiment 2

[0048] The magnesite powder ore and limestone ore used in Example 1 are used as raw materials.

[0049] ①Light burn. In the rotary kiln, suspension roasting kiln, multi-layer furnace, fluidized fluidized furnace or reverberatory furnace, add the above-mentioned raw materials, and use ash-free fuel to lightly burn at 800°C for 2 hours.

[0050] ② cooling. The lightly burned minerals are naturally cooled to 100°C in the air.

[0051] ③ Hydration. The cooled light-burned magnesia and light-burned lime are mixed according to a certain ratio, so that the CaO content accounts for 15% of the total minerals by weight. Put the weighed two kinds of minerals together into water at room temperature 4 times the volume of the minerals, and hydrate them for 40 minutes to hydrate the MgO in the minerals.

[0052] ④The materials obtained in the above step ③, including minerals and water, are directly added to the ball mill, and ball milled for 2 hours.

[0053] ⑤ filter. Filter the ball-...

Embodiment 3

[0060] The magnesite powder ore and limestone ore used in Example 1 are used as raw materials.

[0061] ①Light burn. In the rotary kiln, suspension roasting kiln, multi-layer furnace, fluidized fluidized furnace or reverberatory furnace, add the above raw materials, and use ash-free fuel to lightly burn at 900°C for 1.5 hours.

[0062] ② cooling. The lightly burned minerals are naturally cooled to 150°C in the air.

[0063] ③ Hydration. The cooled light-burned magnesia and light-burned lime are mixed according to a certain ratio, so that the CaO content accounts for 25% of the total minerals by weight percentage. Put the weighed two kinds of minerals together into water at room temperature which is 4 times the volume of the minerals, and perform hydration treatment for 20 minutes to hydrate the MgO in the minerals.

[0064] ④The materials obtained in the above step ③, including minerals and water, are directly added to the ball mill, and ball milled for 2 hours.

[0065] ...

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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 refractory production, 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 use temperature, long refining cycle, etc.), alkaline oxide materials containing free calcium oxide have good high temperature stability and good purification The effect of molten steel has been generally valued. Among them, magnesia-calcium refractory materials are widely used as refractory materials for refining equipment, and magnesia-calcium clinker is the main raw material for the production of this magnesia-calcium refractory material. [0003] The traditional method of producing magnesia-calcium clinker, firstly, magnesite and limestone are used as raw materials, and the two minerals are lightly burned at a lower temperature respe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B2/10C04B35/01
Inventor 陈敏王楠于景坤姜茂发陆彩云
Owner NORTHEASTERN UNIV LIAONING
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