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A kind of environment-friendly castable for kr mixer

An agitator and castable technology, which is applied in the field of environment-friendly KR agitator castables, can solve problems such as waste of raw material resources of refractory materials, improve compactness and anti-slag penetration ability, improve sintering conditions, and achieve high bonding strength. Effect

Active Publication Date: 2019-11-29
北京利尔高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an environment-friendly KR agitator castable, which solves the problem of wasting raw material resources of refractory materials for existing agitators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This example provides an environmentally friendly KR mixer castable, which is prepared by the following preparation method:

[0025] Step 1: Recycle the used KR mixer, and remove the iron slag and dust on the surface of the refractory material of the used mixer;

[0026] Step 2: crushing, breaking and sorting the used agitator refractory materials, and then crushing;

[0027] Step 3: Hydration treatment, after the crushed refractory material is fully wetted with water, then dried naturally;

[0028] Step 4: Sieve, sieve the dried refractory material of the agitator after use, and sieve it into a material with a particle size of 15-0mm for subsequent use;

[0029] Step 5: Batching, batching according to the following weight ratio: 62 parts by weight of the refractory material of the agitator after use, 15 parts by weight of mullite fine powder, 4 parts by weight of silicon micropowder, 5 parts by weight of pure calcium aluminate cement, and 0.5 parts by weight of additi...

Embodiment 2

[0036] This example provides an environmentally friendly KR mixer castable, which is prepared by the following preparation method:

[0037] Step 1: Recycle the used KR mixer, and remove the iron slag and dust on the surface of the refractory material of the used mixer;

[0038] Step 2: crushing, breaking and sorting the used agitator refractory materials, and then crushing;

[0039] Step 3: Hydration treatment, after the crushed refractory material is fully wetted with water, then dried naturally;

[0040] Step 4: Sieve, sieve the dried refractory material of the agitator after use, and sieve it into a material with a particle size of 15-0mm for subsequent use;

[0041] Step 5: Batching, batching according to the following weight ratio: 55 parts by weight of the refractory material of the agitator after use, 20 parts by weight of mullite fine powder, 3 parts by weight of silicon micropowder, 6 parts by weight of pure calcium aluminate cement, and 0.4 parts by weight of additi...

Embodiment 3

[0048] This example provides an environmentally friendly KR mixer castable, which is prepared by the following preparation method:

[0049] Step 1: Recycle the used KR mixer, and remove the iron slag and dust on the surface of the refractory material of the used mixer;

[0050] Step 2: crushing, breaking and sorting the used agitator refractory materials, and then crushing;

[0051] Step 3: Hydration treatment, after the crushed refractory material is fully wetted with water, then dried naturally;

[0052] Step 4: Sieve, sieve the dried refractory material of the agitator after use, and sieve it into a material with a particle size of 15-0mm for subsequent use;

[0053] Step 5: Batching, batching according to the following weight ratio: 70 parts by weight of the refractory material of the agitator after use, 10 parts by weight of mullite fine powder, 5 parts by weight of silicon micropowder, 4 parts by weight of pure calcium aluminate cement, and 0.6 parts by weight of additi...

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Abstract

The invention discloses an environment-friendly KR stirrer castable, and belongs to the technical field of iron-metallurgy-industry molten iron desulphurization pretreatment technologies. A preparing method of the environment-friendly KR stirrer castable includes the following steps of recycling; smashing; hydrating; screening; preparing, wherein a prepared material is prepared from, by weight, 55-70 parts of post-stirrer fireproof materials, 10-20 parts of mullite fine powder, 3-5 parts of silica powder, 4-6 parts of pure calcium aluminate cement, 0.4-0.6 part of an additive and 1-2 parts of an additive; drying and mixing, wherein the prepared material obtained in the step 5 is mixed to be even, and the environment-friendly KR stirrer castable is obtained. The environment-friendly KR stirrer castable is excellent in performance and low in cost, the average service life under the same application condition is 400 times, and the service life of the environment-friendly KR stirrer castable is similar to the service life of a current common stirrer fireproof material.

Description

technical field [0001] The invention relates to the technical field of molten iron desulfurization pretreatment technology in the iron and steel metallurgy industry, in particular to an environment-friendly KR agitator castable. Background technique [0002] The KR stirring desulfurization method is a desulfurization technology outside the molten iron furnace that Japan's Nippon Steel Wentian Iron Works began to study in 1963 and was applied to industrial production in 1965. The desulfurization method has the characteristics of high desulfurization efficiency, less desulfurization agent consumption, short operation time, low metal consumption and low refractory material consumption. In the 1970s, my country's Wuhan Iron and Steel introduced KR stirring desulfurization technology from Japan's Nippon Steel, and other domestic companies also successively introduced or designed and prepared KR stirring desulfurization production lines, which opened up a new pattern for the devel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 张晓波赵冉万小宝丁海瑞刘丽任林曹仁锋胡玲军车晓梅刘美荣于九利赵现华黄健王伟伟王团收郭钰龙
Owner 北京利尔高温材料股份有限公司
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