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

A technology of ferrosilicon nitride and anhydrous taphole clay, which is applied to blast furnace parts, blast furnaces, furnace types, etc., can solve the problems of difficulty in opening holes and slow sintering, and achieves reduction of labor intensity, reduction of tapping times, and corrosion resistance. Good performance and ease of opening

Inactive Publication Date: 2005-11-09
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]

[0021] Other ingredients, % (mass)

3

4

5.5

1.5

Slag erosion 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 drilling

better

it is good

it is good

Difference

[0022] Note: The slag erosion resistance is to make the gun mud Φ50×50mm, the slag hole is Φ25×25mm, and do the high temperature slag invasion test under the reduction condition of 1500℃×3h; the slag used in the blast furnace is: SiO 2 34.29%, Al 2 o 3 14.37%, CaO 43.58, MgO 5.79, FeO 0.9%.

[0023] The chemical composition of the present invention is the detection result after the gun clay is treated in a reducing atmosphere at 1000° C. for 3 hours.

[0024] It can ...

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PUM

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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 tap hole clay materials, and in particular provides an Al alloy containing ferrosilicon nitride. 2 o 3 -SiC-C system anhydrous taphole clay, suitable for making blast furnace clay. technical background [0002] With the implementation of large-scale blast furnaces and high-pressure operations, the requirements for taphole clay are getting higher and higher, and water-filled and ordinary water-free clay can no longer meet the needs of the site. In the second issue of "Baosteel Technology" in 1995, Chen Shouping and others introduced silicon nitride combined with silicon carbide waste bricks into the gun clay, which has good performance. Its composition (mass%) is: 56.26% Al 2 o 3 , 10.7% of SiC, %, 0.238% of (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 si...

Claims

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Application Information

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Patent Type & Authority Patents(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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