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Al*O*-SiC-C system waterless taphole mix containing ferrosilicon nitride

A technology of ferrosilicon nitride and anhydrous taphole mud, which is applied to blast furnace parts, blast furnaces, furnace types, etc., can solve problems such as slow sintering and difficulty in opening holes, and achieve reduced tapping times, reduced labor intensity, and corrosion resistance Good performance and ease of hole opening

Inactive Publication Date: 2004-11-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of Al containing ferrosilicon nitride 2 o 3 - SiC-C system anhydrous taphole clay, by adding 3-20% (mass fraction) ferrosilicon nitride fine powder, solves the problems of slow sintering and difficulty in opening holes in the taphole clay, and improves the performance of the taphole clay; while reducing production costs

Method used

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  • Al*O*-SiC-C system waterless taphole mix containing ferrosilicon nitride

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Specific embodiments of the present invention are shown in Table 2

[0019] Table 2 Embodiments of the present invention

[0020] Other ingredients, % (mass)

3

4

5.5

1.5

Slag corrosion resistance (mm)

it is good

it is good

it is good

it is good

Medium temperature strength

it is good

it is good

it is good

better

Difficulty of opening

better

it is good

it is good

Difference

[0021] Note: The corrosion resistance of slag is to make the taphole mud into Φ50×50mm, the slag hole is Φ25×25mm, and do the high temperature slag invasion test under the reduction condition of 1500℃×3h; blast furnace slag is: SiO 2 34.29%, Al 2 O 3 14.37%, CaO4 3.58, MgO 5.79, FeO 0.9%.

[0022] The chemical composition of the present invention is the detection result of the taphole clay after being treated in a reducing atmosphere at 1000° C.×3h.

[0023...

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Abstract

The invention provides a silicon iron nitride-containing Al2O3-SiC-C system anhydrous tamping plug, composed of Al2O3, SiC, C, Si3N4, SiO2, Fe2O3 and other components in mass percents (m%) of 30-60%, 5-17%, 10-25%, 5-20%, 2-10%, 2-7% and 2-7%, respectively; adding 3-20m% silicon iron nitride to these raw materials, and during detecting course, silicon iron nitride is calculated in Fe2O3 form. Other components include: CaO, MgO, TiO2, K2O and NaO. Its advantages: solving the problems of slowly sintering of tamping plug and difficultly making holes, improving the property of the tamping plug; and at the same time reducing production cost.

Description

technical field [0001] The invention belongs to the technical field of blast furnace taphole mud materials, and in particular provides an Al alloy containing ferrosilicon nitride. 2 O 3 -The SiC-C system is anhydrous tap mud, which can be used for making blast furnace mud. technical background [0002] With the implementation of large-scale blast furnaces and high-pressure operation, the requirements for taphole clay are getting higher and higher. In the second issue of "Baosteel Technology" in 1995, Chen Shouping and others introduced silicon nitride combined silicon carbide waste bricks into the clay. The performance is very good. Its composition (mass%) is: 56.26% Al 2 O 3 , 10.7% SiC, %, 0.238% (K 2 O+NaO), 1.49% Fe 2 O 3 , 4.36%Si 3 N 4 , 0.36% CaO, 0.07% MgO, 0.89% TiO 2 , 10.95% SiO 2 . The main raw materials for its production are silicon nitride combined with silicon carbide, high alumina corundum, soft clay, kyanite and alumina powder. [0003] Introduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/66C21B7/12
Inventor 占华生陈俊红孙加林
Owner UNIV OF SCI & TECH BEIJING
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