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Bake-free iron runner ramming mass containing ferrosilicon nitride

A technology of ferrosilicon nitride and ramming material, applied in the direction of discharge devices, etc., can solve the problems of reduced corrosion resistance, low temperature, high impurities, etc., and achieve the effect of increasing oxidation resistance and high temperature strength

Inactive Publication Date: 2004-11-10
UNIV OF SCI & TECH BEIJING +1
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  • Abstract
  • Description
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Problems solved by technology

In order to improve the strength, clay is used as a vitrified binder to increase the high-temperature strength. However, due to the low temperature of the liquid phase of the clay and high impurities, although the high-temperature strength in the material can be improved, the existence of the glass phase makes the material in the field. Reduced corrosion resistance in use

Method used

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  • Bake-free iron runner ramming mass containing ferrosilicon nitride

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Embodiment Construction

[0035] Add super bauxite, brown corundum, silicon carbide, graphite, pitch, ferrosilicon nitride, metal Al, Si, etc. into the mud mill in proportion, after a little mixing, add phenolic resin and stir until it is evenly mixed. 12 specific implementations of the present invention benefit batching ratio table:

[0036] Table embodiment proportioning (percentages in the table are mass percentages)

[0037]

[0038] The sum of the proportions of super-grade alumina, brown corundum, silicon carbide, silicon nitride iron powder, graphite, pitch, Si, and Al in the ingredient list is 100%, while the addition of phenolic resin is 5.0% and 6.0% of the total raw materials , 6.5%.

[0039] Due to the addition of ferrosilicon nitride, the performance of the iron trench ramming material is greatly improved. According to the ramming material that No. 6 scheme is made in the list of examples at 450m 3 It can be used on the blast furnace iron trench for more than 15 days, which is 4-5 da...

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Abstract

The invention provides a baking free iron groove tamping material containing ferrum silicon nitride which comprises aluminium silicate material, silicon carbide, carbon material, ferrum silicon nitride and bonding agent, their weight portions are, aluminium silicate material 43-80%, silicon carbide 7-25%, carbon material 2-10%, ferrum silicon nitride 5-15%, Si powder 0-4%, Al powder 0-3%, and phenolic resin 2-7%. The invention realizes increased tamping material high-temperature strength, high temperature molten slag erodibility resistance and penetrability, and improved material oxidation resistance property.

Description

technical field [0001] The invention belongs to the material used for the working layer of the iron ditch or the slag ditch in blast furnace ironmaking, and in particular provides an Al alloy containing ferrosilicon nitride. 2 o 3 - SiC-C system ramming material. technical background [0002] Blast furnace iron trench and slag trench lining materials are the main materials used and maintained in front of the blast furnace. At present, due to the different sizes of blast furnaces, the construction methods are also different; as far as the current situation in our country is concerned, these construction methods actually coexist at the same time. The material is also mostly Al 2 o 3 -SiC-C system material is the main material. [0003] Refractory materials for blast furnace iron trough and slag trough are under the action of periodic molten iron and slag, and the service conditions are very harsh, and must meet the following performance requirements: [0004] (1) Good hi...

Claims

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Application Information

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IPC IPC(8): C04B35/18C04B35/66C21B7/14
Inventor 陈俊红孙加林封立侠
Owner UNIV OF SCI & TECH BEIJING
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