Corundum pouring material for insert tube for Rheinstahl-Heraeus (RH) vacuum furnace, and preparation method for corundum pouring material
A technology for inserting tubes and vacuum furnaces, which is applied in the field of vacuum treatment of RH inserting tubes, which can solve the problems of castables falling off, steel structure corrosion, and unusability, so as to alleviate the impact of high temperature performance, improve normal temperature and medium temperature strength, Effect of improving high temperature performance and corrosion resistance
Active Publication Date: 2012-06-27
PANZHIHUA GANGCHENG GROUP
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Problems solved by technology
In the middle and later stages of use, the longitudinal cracks penetrate and expand into cracks, and the steel structure is eroded, causing the castable to fall off and cannot be used anymore
Method used
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[0028] The present invention provides the preparation method of this pouring material, and its steps are as follows:
[0029] A, take raw material by above-mentioned weight ratio;
[0030] B. Stir and mix the raw materials evenly.
[0031] The following describes but does not limit the present invention through the description of specific embodiments of the present invention.
[0032] 15-20 parts of dense corundum with a particle size of 3-5mm, 15-20 parts of white corundum with a particle size of 5-8mm, 25-35 parts of white corundum with a particle size of 0-3mm, 20-25 parts of white corundum powder smaller than 0.088mm, and fused magnesium 4 to 6 parts of powder, 1 to 4 parts of a-alumina micropowder less than 0.088mm, 1 to 2 parts of silicon micropowder, 0.2 parts of water reducer, and 1 to 2 parts of additives.
[0033] Embodiment 1-4 raw material formula is as follows:
[0034] Table 1
[0035]
[0036] Note: The water reducer used in the above table is a low-silic...
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Abstract
The invention relates to a corundum pouring material for an insert tube for a Rheinstahl-Heraeus (RH) vacuum furnace, and a preparation method for the corundum pouring material, and belongs to the technical field of vacuum treatment of RH insert tubes. The technical problem to be solved is to provide the non-cement corundum pouring material for the insert tube for the RH vacuum furnace. The corundum pouring material consists of the following components in percentage by weight: 10 to 20 parts of compact corundum, 45 to 60 parts of white corundum, 10 to 25 parts of white corundum micro powder, 4 to 6 parts of electric smelting magnesium powder, 1 to 4 parts of alpha-aluminum oxide powder, 1 to 2 parts of silicon micro powder, 0.2 part of water reducer, and 1 to 2 parts of additive, wherein the additive is stainless steel fibers. According to the non-cement corundum pouring material, the adding amount of water is low; and the pouring material is long in service life, the average service life is more than 78 times, and the pouring material is an excellent pouring material for the insert tube for the RH vacuum furnace.
Description
technical field [0001] The invention relates to an insert tube corundum castable for an RH vacuum furnace and a preparation method thereof, and belongs to the technical field of RH insert tube vacuum treatment. Background technique [0002] The RH refining technology was successfully developed in 1959 by the German Ruhr Steel Company and Hellas Company. RH combines vacuum refining with circulating flow of molten steel. It has the advantages of short processing period, large production capacity and good refining effect. It is suitable for converter factories with short smelting period and large production capacity. The development of RH to today can be roughly divided into three stages of development: [0003] (1) Development stage (1968-1980): RH equipment technology is widely used all over the world. [0004] (2) Establishment of multifunctional RH refining technology (1980-2000): RH technology has almost reached the point of perfection. [0005] (3) Smelting technology ...
Claims
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IPC IPC(8): C04B35/10
Inventor 青光红陈涛吴胜利袁兵郑德明
Owner PANZHIHUA GANGCHENG GROUP