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Graphite-containing refractory mortar capable of being stored for long time and preparation method thereof

A long-term technology of refractory mud, applied in the field of refractory materials, can solve the problems of poor plasticity of graphite-containing refractory mud, non-infiltration of graphite lubricity, bleeding plasticity, etc., to achieve excellent corrosion resistance to molten steel, reduced sintering performance, and improved plastic effect

Active Publication Date: 2022-01-18
HENAN RONGJIN HIGH TEMPERATRUE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lubricity and non-wetting properties of graphite make it difficult to guarantee the plasticity of graphite-containing refractory mud
In addition, if the clay is stored for a long time, there will be problems such as bleeding and plasticity reduction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A graphite-containing refractory mud that can be preserved for a long time. The raw materials are composed of 5% high-alumina bauxite clinker particles, 47% high-alumina bauxite clinker powder, 25% fused corundum powder, and alumina Micropowder 6%, kyanite powder 4%, spherical clay 6%, -195 flake graphite 4%, earthy graphite 2%, sodium bentonite 1%; plus additives accounting for the total amount of the above raw materials: hydroxypropyl methylcellulose 0.1%, Potassium Sorbate 0.1%, Water 16%, Glycerin 4%.

[0024] The quality standards and particle size requirements of each raw material are as follows:

[0025] High alumina bauxite clinker particles: Al 2 o 3 ≥86%, Fe 2 o 3 ≤1.8%, the particle size is ≤0.2mm;

[0026] High alumina bauxite clinker powder: Al 2 o 3 ≥86%, Fe 2 o 3 ≤1.8%, the particle size is ≤200 mesh.

[0027] Fused corundum powder: Al 2 o 3 ≥99%, Fe 2 o 3 ≤0.3%, the particle size is ≤325 mesh.

[0028] Alumina fine powder: Al 2 o 3 ≥99.2...

Embodiment 2

[0041] A graphite-containing refractory mud that can be preserved for a long time. The raw materials are composed of 8% high-alumina bauxite clinker particles, 45% high-alumina bauxite clinker powder, 15% fused corundum powder, and alumina Micropowder 8%, kyanite powder 6%, spherical clay 7%, -195 flake graphite 6%, earthy graphite 3%, sodium bentonite 2%; plus additives accounting for the total amount of the above raw materials: hydroxypropyl methylcellulose 0.2%, potassium sorbate 0.2%, water 17%, glycerin 5%.

[0042] The quality standards, particle size requirements of each raw material, and the preparation method are the same as in Example 1. The physical performance parameters of the obtained refractory mud are shown in Table 1.

Embodiment 3

[0044] A graphite-containing refractory mud that can be preserved for a long time. The raw materials are composed of 10% high-alumina bauxite clinker particles, 41% high-alumina bauxite clinker powder, 10% fused corundum powder, and alumina Micropowder 10%, kyanite powder 6%, spherical clay 7%, -195 flake graphite 8%, earthy graphite 4%, sodium bentonite 4%; plus additives accounting for the total amount of the above raw materials: hydroxypropyl methylcellulose 0.3%, Potassium Sorbate 0.2%, Water 19%, Glycerin 5%.

[0045] The quality standards, particle size requirements of each raw material, and the preparation method are the same as in Example 1. The performance parameters of the obtained refractory mud are shown in Table 1.

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Abstract

The invention provides graphite-containing refractory mortar capable of being stored for a long time. The graphite-containing refractory mortar comprises the following raw materials: 5-10% of high-alumina bauxite clinker particles, 40-50% of high-alumina bauxite clinker powder, 10-25% of fused corundum powder, 5-10% of alumina micro powder, 3-6% of kyanite powder, 6-7% of ball clay, 4-8% of crystalline flake graphite, 2-4% of amorphous graphite and 1-4% of sodium bentonite. And the additive comprises the following components in percentage by weight: 0.1-0.3% of hydroxypropyl methyl cellulose, 0.1-0.2% of potassium sorbate, 16-19% of water and 4-5% of glycerol. The two-step production process of prefabricating the dry powder of the refractory mortar and adding water into the refractory mortar for stirring is adopted, so the uniformity and the quality stability of the refractory mortar can be ensured, and the viscosity and the plasticity of the refractory mortar are ensured. The obtained refractory mortar is long in preservation time, can be stored for 4-6 months, is good in plasticity, is excellent in molten steel erosion resistance, is not sintered with other refractory materials, and is easy to clean.

Description

technical field [0001] The invention relates to a graphite-containing refractory mud which can be stored for a long time and a preparation method thereof, belonging to the technical field of refractory materials. Background technique [0002] Refractory clay, also known as fire clay or joint material (powder), is composed of refractory powder, binder and admixture, and is used as a joint material for refractory product masonry. According to the material, it can be divided into clay refractory clay, high alumina refractory clay, silicon refractory clay and carbon-containing refractory clay. Sliding nozzle is a functional refractory material for steelmaking and continuous casting, and its service conditions are harsh, which directly affects the safe production of continuous casting. During production and use, the sliding plate and the upper nozzle, the sliding plate and the lower nozzle, the upper nozzle and the seat brick need to be filled with refractory mud to make it a se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/103C04B35/622C04B35/636C04B35/632
CPCC04B35/103C04B35/622C04B35/6365C04B35/632C04B2235/349C04B2235/425C04B2235/9615C04B2235/96
Inventor 牛智旺赵臣瑞韩彦锋梁保青徐跃庆李宏宇李雪翠来丽苹王海霞
Owner HENAN RONGJIN HIGH TEMPERATRUE MATERIALS CO LTD
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