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Preparation method of ceramic launder

A technology for ceramic launders and launders, applied in the field of preparation of ceramic launders, can solve the problems of serious wear and tear of copper launders, high cost of copper launders, and high use costs, and achieve smooth flow, long service life, and simplified equipment cooling. The effect of the device

Active Publication Date: 2014-08-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the copper launder has huge disadvantages: First, the wear of the copper launder is very serious and needs to be checked constantly. If the cooling water leaks, it must be replaced immediately, otherwise a serious explosion accident will occur
Secondly, the cost of the copper launder is expensive and the cost of use is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Weigh a certain amount of silicon carbide powder, metal silicon powder and pulp waste liquid, wherein the mass ratio of the total mass of silicon carbide powder and metal silicon powder to pulp waste liquid is 100:0.5, and the silicon carbide powder and metal silicon powder The mass percentage is 85:15, the particle size of metal silicon powder is finer than 200 mesh, and the particle size of silicon carbide powder is finer than 15 mesh;

[0024] 2) Take a certain amount of water, wherein the mass ratio of the total mass of silicon carbide powder and metal silicon powder to water is 100:8, then mix the water, silicon carbide powder, metal silicon powder and pulp waste liquid evenly to obtain raw material;

[0025] 3) The raw materials obtained in step 2) are molded according to the shape of the launder by dry pressing to obtain the launder;

[0026] 4) Put the launder obtained in step 3) into a nitriding furnace after being dried in a drying chamber, feed nitrogen g...

Embodiment 2

[0028] 1) Weigh a certain amount of silicon carbide powder, metal silicon powder and pulp waste liquid, wherein the mass ratio of the total amount of silicon carbide powder and metal silicon powder to pulp waste liquid is 100:0.7, silicon carbide powder and metal silicon powder The mass percentage is 83:17, the particle size of metal silicon powder is 240 mesh, and the particle size of silicon carbide powder is 80 mesh;

[0029] 2) Take a certain amount of water, wherein the mass ratio of the total mass of silicon carbide powder and metal silicon powder to water is 100:6, then mix the water with silicon carbide powder, metal silicon powder and pulp waste liquid evenly to obtain raw material;

[0030] 3) The raw materials obtained in step 2) are molded according to the profile mold of the launder by ramming molding to obtain the launder;

[0031] 4) Put the launder obtained in step 3) into a nitriding furnace after being dried in a drying chamber, blow nitrogen into it, nitrid...

Embodiment 3

[0033] 1) Weigh a certain amount of silicon carbide powder, metal silicon powder and pulp waste liquid, wherein the mass ratio of the total mass of silicon carbide powder and metal silicon powder to pulp waste liquid is 100:0.9, silicon carbide powder and metal silicon powder The mass percentage is 80:20, the particle size of metal silicon powder is 280 mesh, and the particle size of silicon carbide powder is 150 mesh;

[0034] 2) Take a certain amount of water, wherein the mass ratio of the total mass of silicon carbide powder and metal silicon powder to water is 100:7, then mix the water with silicon carbide powder, metal silicon powder and pulp waste liquid evenly to obtain raw material;

[0035] 3) The raw material obtained in step 2) is formed by dry pressing according to the shape mold of the launder to obtain the launder;

[0036] 4) Put the launder obtained in step 3) into a nitriding furnace after being dried in a drying chamber, blow nitrogen into it, nitriding at 1...

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PUM

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Abstract

The invention discloses a preparation method of a ceramic launder. The ceramic launder comprises the following raw materials: 15-27% of metal silicon powder, 73-85% of silicon carbide powder and 0.5-2% of a binder based on the total mass The preparation method comprises the following steps: adding 5-8% of water based on the total mass of metal silicon powder and silicon carbide powder into the raw materials, and uniformly mixing for later use; moulding the prepared raw materials according to a shape mould of the launder; putting the moulded launder in a drying chamber to dry; putting the dried launder in a nitriding furnace, introducing nitrogen and nitriding and sintering; and discharging the sintered launder out of a kiln to obtain the ceramic launder. The preparation method disclosed by the invention is used for preparing the launder by combining silicon nitride with the silicon carbide material. A proper launder shape is moulded at one time according to high-temperature resistant and wear-resistant characteristics of the ceramic material. The ceramic launder prepared is not cooled by cooling water in the using process. The ceramic launder is long in service life and free from the risk of contact explosion with water.

Description

technical field [0001] The invention relates to a preparation method of a launder, in particular to a preparation method of a ceramic launder. Background technique [0002] During the smelting process of metal copper, it is necessary to direct the smelted copper liquid from the smelting furnace to the copper ladle or the copper casting mold, so as to facilitate the purification of metal copper in the next step. The distance from the smelting furnace to the copper ladle or the copper casting mold is generally about 3 to 20 meters, and a launder is needed to guide the flow of the copper liquid. The temperature of the molten copper is generally as high as 1200-1300°C, and it has a large specific gravity and is highly corrosive. There are few suitable materials that can ensure the normal use of the launder for a long time. [0003] The document "Chinese Patent CN201828155U" discloses a copper liquid launder, which is made of copper, and is characterized in that aluminum silicat...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/565C04B35/622
Inventor 黄凤萍刘恒
Owner SHAANXI UNIV OF SCI & TECH
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