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Degassing sheet for jet refining of molten metal and preparation method of degassing sheet

A technology for refining metal and degassing sheets, applied in the field of degassing sheets, can solve the problems of obvious air jet uniformity, small jet aperture of degassing sheets, complicated installation, etc. uniform effect

Active Publication Date: 2015-03-25
江苏苏嘉集团新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to solve the problem that the air bricks in the air-jet refining furnace of the existing air bricks contain heavy metal chromium and the air bricks need to be used in conjunction with the seat bricks and the installation is complicated In order to solve the disadvantages of this method, a chrome-free degassing sheet suitable for gas-jet refining molten metal and its preparation method are provided. The air-jetting aperture of the degassing sheet is small, the effect of uniform gas injection is obvious, and the preparation method is simple.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A degassing sheet used for air-jet refining molten metal, including components in mass percentage: natural sintered mullite M75 50%, white corundum 18%, active α-Al 2 O 3 Micropowder 30%, clay 2%; all components are combined with a sol binder with a silica content of 20% and a specific gravity of 1.1. The amount of the sol binder is 4% of the total mass of the components. Of which Al in natural sintered mullite M75 2 O 3 The content is 70%, the particle size is 0.2mm, the active α-Al 2 O 3 The particle size of the micropowder is 5μm.

[0021] The preparation steps are:

[0022] (1) Ingredients: Weigh the raw materials natural sintered mullite M75, white corundum, and active α-Al according to the ratio of each component 2 O 3 Micropowder, clay and sol binding agent;

[0023] (2) Mixing: First, put the natural sintered mullite M75 and white corundum into the sand mixer for dry mixing for 2 minutes, add the sol binder and continue mixing for 2 minutes, and then add active α-Al 2 ...

Embodiment 2

[0029] A degassing sheet used for air-jet refining molten metal, including components in mass percentage: natural sintered mullite M75 50%, white corundum 20%, active α-Al 2 O 3 Micropowder 25%, clay 5%; all components are combined with a sol binder with a silica content of 25% and a specific gravity of 1.2. The amount of sol binder is 4% of the total mass of the components. Of which Al in natural sintered mullite M75 2 O 3 The content is 75%, the particle size is 0.5mm, the active α-Al 2 O 3 The particle size of the micropowder is 8μm.

[0030] The preparation steps are:

[0031] (1) Ingredients: Weigh the raw materials natural sintered mullite M75, white corundum, and active α-Al according to the ratio of each component 2 O 3 Micropowder, clay and sol binding agent;

[0032] (2) Mixing: First, put the natural sintered mullite M75 and white corundum into the sand mixer for dry mixing for 4 minutes, add the sol binder and continue mixing for 4 minutes, and then add active α-Al in...

Embodiment 3

[0038] A degassing sheet used for air-jet refining molten metal, which contains components calculated by mass percentage: 60% of natural sintered mullite M75, 10% of white corundum, and active α-Al 2 O 3 Micropowder 25%, clay 5%; all components are combined with a sol binder with a silica content of 30% and a specific gravity of 1.2. The amount of sol binder is 5% of the total mass of the components. Of which Al in natural sintered mullite M75 2 O 3 The content is 75%, the particle size is 1.0mm, the active α-Al 2 O 3 The particle size of the micropowder is 10μm.

[0039] The preparation steps are:

[0040] (1) Ingredients: Weigh the raw materials natural sintered mullite M75, white corundum, and active α-Al according to the ratio of each component 2 O 3 Micropowder, clay and sol binding agent;

[0041] (2) Mixing: First, put the natural sintered mullite M75 and white corundum into the sand mixer for dry mixing for 5 minutes, add the sol binder and continue mixing for 5 minutes, a...

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PUM

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Abstract

The invention relates to a degassing sheet for jet refining of molten metal and a preparation method of the degassing sheet. The degassing sheet comprises the following components in percentage by mass: 50%-60% of mullite, 10%-20% of white corundum, 20%-30% of alumina micro powder and 2%-5% of clay, wherein all components are combined together by adopting a gel binding agent; the amount of the gel binding agent is 4%-5% of total mass of the components. The preparation method comprises the following steps: sequentially burdening, mixing raw materials, and then pressing and molding on a 2-4MPa of vibration molding machine; and baking at 100-140 DEG C, and then firing into a green brick in a shuttle kiln. The preparation method disclosed by the invention is simple; the prepared degassing sheet has the advantages of small jet aperture, jet uniformity, long service life, small resistance, and relatively low production cost, and is simple and convenient to use; nonferrous metal is not easy to ooze; and the working area and the ventilation efficiency are greater than those of common air bricks.

Description

technical field [0001] The invention relates to a degassing sheet used for gas-jet refining molten metal, and belongs to the technical field of refractory material preparation. Background technique [0002] Harmful solid inclusions and hydrogen in molten metal should be removed before metal and its alloys are cast. With the wide application of non-ferrous metal profiles, the quality requirements for metal profiles are getting higher and higher. The purification in the furnace can no longer meet the requirements, and the purification technology outside the furnace must be used. Raw materials for aviation forgings, foils, thin-walled profiles, wires and cables, automotive wheels and other products must be treated by a purification device outside the furnace before they can be cast. [0003] At present, there are two kinds of rotary air jet method and ceramic filter filter that are widely used in the purification device outside the furnace at home and abroad. However, the ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 曹丽云张雪松
Owner 江苏苏嘉集团新材料有限公司
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