Electrically conductive hot-patch material for DC arc furnace and its preparing process

A technology of a DC electric arc furnace and a manufacturing method is applied in the field of refractory materials to achieve the effects of low cost, short technological process and good resistance to rapid cooling and rapid heating.

Inactive Publication Date: 2004-06-09
宋景尧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the service life problem of the existing conductive hot filling material for DC electric arc furnace, the present invention provides a conductive hot filling material for DC electric arc furnace with good fluidity, strong corrosion resistance, good conductivity and long service life and its manufacturing method

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  • Electrically conductive hot-patch material for DC arc furnace and its preparing process
  • Electrically conductive hot-patch material for DC arc furnace and its preparing process
  • Electrically conductive hot-patch material for DC arc furnace and its preparing process

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Embodiment Construction

[0037] raw material:

[0038] 1. Fused magnesia:

[0039] The fused magnesia of DMS-98 grade is selected, and its physical and chemical properties meet the requirements of ZBD52 001-90.

[0040] 2. Carbon material

[0041] ① Graphite:

[0042] The grade LG(-)100-96 is selected, and its physical and chemical performance indicators meet the requirements of GB / T3 518-95.

[0043] ②Special carbon: its index complies with the provisions of GB2290-80 and GB9730-88.

[0044] 3. Additives and binders:

[0045] Using the above-mentioned additives and binders, according to the aforementioned process, the conductive hot filler for DC electric arc furnace of the present invention is prepared.

[0046] Use this conductive heat supplement for:

[0047] The process parameters are: ABB DC electric arc furnace with a nominal capacity of 60t, a furnace shell diameter of 5.2m, a transformer capacity of 56MVA, an electric furnace smelting cycle of 80min, a tapping temperature of 1630-1650°C...

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Abstract

An electrically conductive hot patch material for DC arc furnace contains MgO (81-85%), CaO (1-2%) SiO2 (0.5-1.5%), Fe2O3 (0.5-1.0%), Al2O3 (0.2-1%), C (5-10%) and Mg+Al (2-3%), and is prepared through choosing electric melting magnesium sand and carbon material, crushing, sieving, adding binder and additive, and mixing. Its advantages include low cost, high flowability, electric conductivity and anticorrosion nature, and long service life.

Description

Technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a conductive hot-filling material for a DC electric arc furnace and a manufacturing method thereof. Background technique [0002] The smelting process of DC electric arc furnace requires that the refractory material used for the bottom of the furnace should not only have good corrosion resistance, but also must have excellent electrical conductivity. The conductive hot-filling material used in the existing DC electric arc furnace has a short service life and cannot meet the requirement of 40 furnaces to be hot-repaired once. Frequent furnace repairs are required during production, which may even cause production accidents such as short circuit and leakage at the bottom of the furnace, resulting in long smelting cycle and High power consumption and high steel consumption per ton. Therefore, it is very necessary to develop conductive hot filling material f...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B35/035C04B35/04F27B3/08F27B3/10
Inventor宋景尧
Owner宋景尧