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Green and environment-friendly magnesia spinel gunning mix for converter as well as preparation and application of green and environment-friendly magnesia spinel gunning mix

A magnesia spinel, green and environmentally friendly technology, applied in the field of refractory materials for converters, can solve pollution, resource waste and environmental problems, and achieve the effects of reducing costs, reducing steelmaking costs, and excellent adhesion

Pending Publication Date: 2021-11-19
ZHEJIANG ZILI HIGH TEMPERATURE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The waste magnesia spinel bricks produced by the existing steel mills are all treated as industrial waste, resulting in waste of resources and environmental pollution

Method used

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  • Green and environment-friendly magnesia spinel gunning mix for converter as well as preparation and application of green and environment-friendly magnesia spinel gunning mix
  • Green and environment-friendly magnesia spinel gunning mix for converter as well as preparation and application of green and environment-friendly magnesia spinel gunning mix
  • Green and environment-friendly magnesia spinel gunning mix for converter as well as preparation and application of green and environment-friendly magnesia spinel gunning mix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5、 comparative example 1

[0042] In terms of parts by mass, the raw material composition of the magnesia spinel gunning material of Examples 1 to 5 and the platy corundum gunning material of Comparative Example 1 is shown in Table 1, and the magnesia spinel reclaimed material (MgO and Al 2 o 3 The total content is not less than 95wt%), magnesia material (MgO content ≥ 95wt%), or magnesia material (MgO content ≥ 95wt%), and tabular corundum are added to the mixer in proportion to pre-mix for 1-2min, and then added in proportion Anti-explosion agent, magnesium binder (Yixing Zili Micro Powder Material Technology Co., Ltd., LIMAGEL-75 high-strength magnesium binder, particle size not greater than 5μm, MgO content in its composition ≥ 77.00wt%, SiO 2 Content ≥ 13.00wt%, loss on ignition at 950°C ≤ 6.0wt%), phosphate binder, slaked lime powder, thickener, and stir in a mixer for 3-5min to obtain the corresponding magnesium spinel Gunning material or tabular alumina gunning material. Test the amount of wat...

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Abstract

The invention discloses a green and environment-friendly magnesia spinel gunning mix for a converter, a preparation method of the green and environment-friendly magnesia spinel gunning mix and an application of the green and environment-friendly magnesia spinel gunning mix in converter maintenance. The magnesia spinel gunning mix comprises the following raw materials in parts by mass: 45-80 parts of a magnesia spinel reclaimed material, 5-35 parts of a magnesia material, 4-14 parts of a magnesia binding agent, 1-5 parts of a phosphate binding agent, 2-5 parts of slaked lime micro powder, 0.05-0.5 part of a thickening agent and 0.05-0.5 part of an anti-explosion agent. The gunning mix does not contain asphalt and resin, is environment-friendly, and has excellent adhesion and molten steel corrosion resistance by introducing the magnesium spinel reclaimed material and adopting the magnesium binding agent. The waste refractory materials are recycled, the green and environment-friendly development requirement is met, the service life of the gunning material is guaranteed, the steelmaking cost is reduced, and application and popularization are facilitated.

Description

technical field [0001] The invention relates to the technical field of refractory materials for converters, in particular to a green and environment-friendly magnesia spinel gunning material for converters and its preparation and application. Background technique [0002] The converter is the main equipment for the steelmaking production of the converter. Due to the long-term mechanical impact and slag erosion of the converter at high temperature, the refractory material of the converter is easily damaged. Gunning material is widely used in converter lining repair, and its repair effect and frequency directly affect the service life and production rhythm of converter. With the continuous increase in the proportion of scrap steel and the increasingly severe smelting conditions, the requirements for refractory materials for converter maintenance are getting higher and higher. Usually, fused magnesia or sintered magnesia is used as the main raw material for repairing material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/443C04B35/66C04B35/622C21C5/44
CPCC04B35/443C04B35/66C04B35/62204C21C5/44C04B2235/3206C04B2235/3208C04B2235/5212C04B2235/5427C04B2235/5436C04B2235/77C04B2235/9607C04B2235/9615C04B2235/9669Y02P10/20
Inventor 刘光平李媛媛宋雅楠尹明强徐亮柯极峰熊元杰
Owner ZHEJIANG ZILI HIGH TEMPERATURE TECH CO LTD
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