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Fast-firing non-phosphorus low-silicon gunning mix and preparation method thereof

A fast-burning, gunning material technology, applied in the field of refractory materials, can solve problems such as increased maintenance cost, molten steel pollution, and quality impact, and achieve the effect of ensuring sintering strength, protecting gunning parts, and ensuring purity.

Active Publication Date: 2021-09-21
芦贻春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many kinds of refractory gunning materials. Some key performances are insufficient, resulting in a large waste of materials, increased maintenance costs, or unsatisfactory use effects
Gunning materials commonly used in the market use relatively common silicates and phosphates as binders. The introduction of phosphorus in gunning materials will pollute molten steel, which is unfavorable for smelting some special steel types. Gunning materials After being washed, the components in the molten steel are mixed, which affects the quality

Method used

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  • Fast-firing non-phosphorus low-silicon gunning mix and preparation method thereof
  • Fast-firing non-phosphorus low-silicon gunning mix and preparation method thereof
  • Fast-firing non-phosphorus low-silicon gunning mix and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] This embodiment provides a fast-burning non-phosphorus and low-silicon gunning material, which is composed of the following components in weight percentage: 24% of sintered magnesia with a particle size of 1-3mm as raw material, and sintered magnesia with a particle size of 0.088-0.999mm 26% (93.5% by mass of MgO), 24% of fine powder of sintered magnesia whose particle size is less than 0.063mm (96.5% by mass of MgO), 15% of waste magnesia bricks with a particle size of 0.1-3mm, calcined 3.0% alumina micropowder, 2.5% lightly burned magnesia powder, 3.4% slaked lime, 1.5% industrial boric acid, 0.1% light inorganic salt, 0.17% organic plastic binder, 0.2% anti-rebound additive, 0.13% organic fiber.

Embodiment 2

[0032] This embodiment provides a fast-burning non-phosphorus and low-silicon gunning material, which is composed of the following components in weight percentage: 22% of sintered magnesia with a particle size of 1-3mm, and sintered magnesia with a particle size of 0.088-0.999mm 30% (95% by mass of MgO), 23.5% of sintered magnesia fine powder with a particle size of less than 0.063mm (97% by mass of MgO), 14% of waste magnesia bricks with a particle size of 0.1-3mm, calcined Alumina fine powder 2.5%, magnesium carbonate 1.0%, lightly burned magnesia powder 1.0%, slaked lime 4.4%, industrial boric acid 1.0%, light inorganic salt 0.05%, organic plastic binder 0.25%, anti-rebound additive 0.15%, organic Fiber 0.15%.

Embodiment 3

[0034] This embodiment provides a fast-burning non-phosphorus and low-silicon gunning material, which is composed of the following components in weight percentage: 20% of sintered magnesia with a particle size of 1-3mm as raw material, and sintered magnesia with a particle size of 0.088-0.999mm 28% (92.5% by mass of MgO), 23% of fused magnesia fine powder with a particle size of less than 0.063mm (96.8% by mass of MgO), magnesia spinel waste bricks with a particle size of 0.1-3mm 17 %, calcined alumina micropowder 1.5%, lightly burned magnesia powder 1.0%, magnesium chloride 1.5%, magnesium sulfate 1.5%, slaked lime 4.1%, sodium borate 1.8%, light inorganic salt 0.12%, organic plastic binder 0.15%, Anti-rebound additive 0.15%, organic fiber 0.18%.

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Abstract

The invention discloses a fast-firing non-phosphorus low-silicon gunning mix and a preparation method thereof. The fast-firing non-phosphorus low-silicon gunning mix is composed of the following components in percentage by weight: 70-80% of magnesite, 10-15% of waste bricks, 0.1-5% of aluminum oxide superfine powder, 0.5-5.0% of magnesium compound micro powder, 0.5-5% of slaked lime, 0.5-2.0% of a boron-containing compound, 0.05-0.12% of a light inorganic salt, 0.15-0.25% of an organic plastic adhesive, 0.15-0.2% of an anti-rebound additive, and 0.13-0.18% of organic fibers. Compared with the prior art, the gunning mix disclosed by the invention can be rapidly sintered at low temperature, ensures the gunning adhesion rate and sintering performance, has better corrosion resistance, does not use phosphate or silicate as a binding agent, avoids introduction of a large amount of phosphorus and silicon components, has low impurity content in components, ensures the service life of a furnace lining refractory material, does not cause inclusion to molten steel and the like at the same time, reduces pollution to molten steel, and meets the special smelting purity requirement.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a fast-burning non-phosphorus and low-silicon gunning material and a preparation method thereof. Background technique [0002] Steel and non-ferrous metallurgical industrial kiln equipment works in high temperature environment for a long time. Generally, refractory materials are used as the inner lining. After a period of use, it will be corroded by liquid metal and its smelting slag, and erosion loss will occur. Generally, gunning materials are required in the smelting gap Carry out hot repair to meet the requirements of normal use. [0003] At present, there are many types of refractory gunning materials. Although they can play a repairing role, they are often insufficient in some key properties such as adhesion rate, adhesion, sinterability, and erosion resistance, resulting in a large waste of materials and maintenance costs. Improve, or the use effect is not id...

Claims

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Application Information

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IPC IPC(8): C04B35/043C04B35/622C04B35/636C04B35/634
CPCC04B35/043C04B35/62204C04B35/636C04B35/6365C04B35/634C04B2235/3217C04B2235/3208C04B2235/3409C04B2235/3201C04B2235/5212C04B2235/5427C04B2235/5436C04B2235/9669
Inventor 武连明闫恒王瑞伟李晓波
Owner 芦贻春
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