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Forsterite bakie coating material and method for making same

A technology of forsterite and forsterite sand, which is applied in the field of forsterite tundish coating and its preparation, can solve the problems of high cost, harm to human body, and low price of forsterite sand, and achieve no pollution to molten steel, durable Good high temperature performance and low price

Inactive Publication Date: 2008-02-06
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to save magnesia raw materials, some manufacturers use dolomite and magnesia as the main raw materials to prepare refractory coatings for tundishes (CN1459346, CN1074635). However, dolomite is easy to hydrate and produces large volume expansion, and the volume stability of the coating is not good. it is good
The tundish coating produced by magnesia plus chromite sand has good volume stability (CN1060302), but the price of chrome concentrate is expensive, the cost is too high, and chromium oxide will volatilize hexavalent chromium at high temperature, which is harmful to human body
Forsterite sand is low in price and good in high temperature resistance. It is a good raw material for preparing tundish coatings. A few manufacturers use forsterite sand in ingredients to prepare tundish coatings (CN1459345), but there are many types of raw materials. The actual amount of sand added is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A refractory coating for a forsterite tundish and a preparation method thereof. Mix 35-50wt% forsterite sand, 25-45wt% forsterite clinker, 15-20wt% magnesia fine powder, 7-15wt% magnesia-calcium sand fine powder and 2-5wt% clay , add 0.5wt% of paper fiber, 0.5-1.5wt% of sodium hexametaphosphate and 0.3-1.0wt% of sodium tripolyphosphate, mix evenly with a mixer, pack in separate bags, add water and stir before construction and application.

[0012] Among them: MgO content of forsterite sand ≥ 41.0wt%, particle size 0-3mm, MgO content of forsterite clinker ≥ 43.0wt%, particle size 0-3mm, MgO content of magnesia fine powder ≥ 93.0 wt%, particle size 0-0.074mm, MgO content of magnesia-calcium sand fine powder ≥ 95.0wt%, particle size 0-0.074mm, clay fine powder Al 2 o 3 Content ≥ 30.0wt%, particle size 0-0.074mm.

Embodiment 2

[0014] A refractory coating for a forsterite tundish and a preparation method thereof. Mix 20-35wt% forsterite sand, 35-55wt% forsterite clinker, 18-25wt% magnesia fine powder, 5-10wt% magnesia-calcium sand fine powder and 1-3wt% clay , add 0.5-1.0wt% sodium hexametaphosphate and 0.3-1.0wt% sodium tripolyphosphate, mix evenly with a mixer, then pack in bags, add water and stir before construction and application.

[0015] Among them: MgO content of forsterite sand ≥ 41.0wt%, particle size 0-3mm, MgO content of forsterite clinker ≥ 43.0wt%, particle size 0-3mm, MgO content of magnesia fine powder ≥ 93.0 wt%, particle size 0-0.074mm, MgO content of magnesia-calcium sand fine powder ≥ 95.0wt%, particle size 0-0.074mm, clay fine powder Al 2 o 3 Content ≥ 30.0wt%, particle size 0-0.074mm.

Embodiment 3

[0017] A refractory coating for a forsterite tundish and a preparation method thereof. Mix 20-30wt% forsterite sand, 30-45wt% forsterite clinker, 25-30wt% magnesia fine powder, 5-10wt% magnesia-calcium sand fine powder and 1-3wt% clay , plus 0.1wt% polyethylene fiber, 0.5-1.5wt% sodium hexametaphosphate and 0.3-0.8wt% sodium tripolyphosphate, according to the above ingredients ratio, mixed evenly by a mixer, and then packed in bags, when used Add water and stir to apply.

[0018] Among them: MgO content of forsterite sand ≥ 41.0wt%, particle size 0 ~ 3mm, MgO content of forsterite clinker ≥ 43.0wt%, particle size 0 ~ 3mm, MgO content of magnesia fine powder ≥ 93.0 wt%, particle size 0-0.074mm, MgO content of magnesia-calcium sand fine powder ≥ 95.0wt%, particle size 0-0.074mm, clay fine powder Al 2 o 3 Content ≥ 30.0wt%, particle size 0-0.074mm.

[0019] This specific embodiment uses forsterite sand as the base material, and the prepared forsterite tundish refractory coati...

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Abstract

The present invention relates to a refractory coating for forsterite tundish and the preparation method thereof. The technical scheme adopted is that: 20-50 wt percent of forsterite sand, 25-55 wt percent of forsterite clinker, 15-30 wt percent of magnesia powder, 5-15 wt percent of magnesia-calcium sand powder are mixed with 1-5 wt percent of clay, which are coupled with 0-0.5 wt percent of organic fiber of the above ingredients, 0.5-2.0 wt percent of sodium hexametaphosphate and 0.3-1.0 wt percent of sodium tripolyphosphate, and then the present invention is prepared through the mixing of a mixer; when the present invention is in use, the present invention is added with water and stirred. The present invention takes forsterite as base material, and the products prepared is characterized in good high-temperature resistance, low cost, no pollution to molten steel, good durability, no adverse effect to human body and convenient use.

Description

technical field [0001] The invention belongs to the field of refractory materials with forsterite sand as the base material. In particular, it relates to a forsterite-based tundish coating and a preparation method thereof. Background technique [0002] With the rapid development and wide application of continuous casting technology in the steelmaking industry, the continuous casting of steel has replaced the traditional mold casting of steel. The tundish is the key equipment of continuous casting, and the refractory coating of the working layer of the tundish is very large. However, the vast majority of refractory coatings for tundishes are made of magnesia raw materials, and magnesia mineral resources are scarce, and magnesia raw materials are increasingly scarce. It is inevitable to use other raw materials to replace magnesia raw materials to prepare refractory coatings for tundishes. [0003] For this reason, many manufacturers at home and abroad are seeking to use other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/18B22C1/00B22D41/02
Inventor 祝洪喜邓承继白晨葛山石生德庞伟
Owner WUHAN UNIV OF SCI & TECH
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