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High-strength wear-resistant coating and application thereof

A technology of coating material and wear-resistant material, applied in the field of refractory materials, can solve the problems of high cost, high activity of steel slag, time-consuming and labor-intensive, etc., and achieve the effect of good coating construction performance, good durability and good wear resistance.

Pending Publication Date: 2022-03-01
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods all use the method of integral casting of refractory materials to replace the alloy lining plate, which requires the production of casting molds for construction, which is time-consuming and laborious. Once the refractory lining is damaged after integral casting, it is usually only partially damaged, and a support mold is required to pour again. higher cost
[0004] There are many related technologies for using waste refractory materials as refractory raw materials, such as the above-mentioned Chinese invention patent application 201810653827.0 and Chinese invention patent application 201910743193.2, a kind of waste magnesia-aluminum spinel as raw material and methods for preparing tundish magnesium smear materials. The treatment methods of refractory materials are almost always to use the dismantled waste refractory materials as raw materials after deslagging, sorting, crushing, and screening to obtain the required particle size. Because most of the waste refractory bricks removed from the steelmaking furnace There are a lot of steel slag attached, these steel slags have to be removed in the process of traditional waste refractory recycling, which also causes a certain degree of waste
[0005] Attempts have also been made to use steel slag as a wear-resistant material, such as Chinese invention patent application 201510109318.8, a high-strength and high-wear-resistant cement-based material and its preparation method, which adds finely ground steel slag with an average particle size of 1-3 microns as ultrafine Wear-resistant admixture, but the steel slag under this particle size is very active, and will actively participate in the sintering reaction above 500°C, resulting in a large volume expansion of the material, and then unfavorable phenomena such as cracking, so it cannot be applied above 500°C use environment

Method used

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  • High-strength wear-resistant coating and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A high-strength wear-resistant smear material, its raw materials are composed of the following components by weight percentage:

[0064] Wear-resistant aggregate + powder 80%, of which, 30% of wear-resistant aggregate with hmm2 o 3 The mass fraction of +SiC is ≥60%, and the mass fraction of steel slag in the wear-resistant aggregate with a particle size of 0.074mm<0.5mm is about 30%.

[0065] Particle size ≤ 0.044mm silica powder 3%;

[0066] Alumina micropowder with particle size ≤0.044mm 3%;

[0067] Aluminate cement 12.5%;

[0068] Bentonite 1.5%;

[0069] The sum of the weight percentages of the above-mentioned raw materials is 100%.

[0070] Add 0.2% of sodium hexametaphosphate+FDN and 0.2% of boric anhydride accounting for the total weight of the above raw materials.

[0071] The raw materials with the above weight percentages are put into a forced mixer and mixed evenly, and packed in tons of bags for transportation. Weld the anchors evenly on the iron shel...

Embodiment 2

[0073] A high-strength wear-resistant smear material, its raw materials are composed of the following components by weight percentage:

[0074] Wear-resistant aggregate + powder 81%, of which, 32% of wear-resistant aggregate with 1mm2 o 3 Quality score ≥ 90%

[0075] Silica powder with particle size ≤0.044mm 2.5%;

[0076] Alumina micropowder with particle size ≤0.044mm 3%;

[0077]Portland cement 12%;

[0078] Guangxi soil 1.5%;

[0079] The sum of the weight percentages of the above-mentioned raw materials is 100%.

[0080] Add 0.3% sodium hexametaphosphate+FDN and 0.2% boric anhydride which account for the total weight of the above raw materials.

[0081] The raw materials with the above weight percentages are put into a forced mixer and mixed evenly, and packed in tons of bags for transportation. Evenly weld the anchors on the iron shell lining the blast furnace silo in advance, put the mixture into the mixer and add 4.5% water to stir for 3 minutes when using it on ...

Embodiment 3

[0083] A high-strength wear-resistant smear material, its raw materials are composed of the following components by weight percentage:

[0084] Wear-resistant aggregate + powder 80%, of which, 28% of wear-resistant aggregate with 1mm2 o 3 The mass fraction of + SiC is ≥ 45%, and about 20% of the SiC raw material is added to the wear-resistant aggregate with a mass fraction of 0.5mm < particle size ≤ 1mm.

[0085] Silica powder with particle size ≤0.044mm 2.5%;

[0086] Alumina micropowder with particle size ≤0.044mm 2.5%;

[0087] Sulphoaluminate cement 13%;

[0088] Guangxi soil 2%;

[0089] The sum of the weight percentages of the above-mentioned raw materials is 100%.

[0090] Add 0.3% sodium hexametaphosphate+FDN and 0.2% sericite which account for the total weight of the above raw materials.

[0091] Put the raw materials with the above weight percentage into the forced mixer and mix evenly, pack and transport in tons of bags, put the mixed material into the mixer an...

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Abstract

The invention particularly relates to a high-strength wear-resistant coating and application thereof, and belongs to the technical field of refractory materials. The main material comprises a wear-resistant material, and the wear-resistant material comprises 43-85 parts of wear-resistant aggregate and 10-25 parts of wear-resistant powder; 1-5 parts of silica powder; 1-5 parts of alumina micro powder; 10 to 15 parts of a binding agent; 1-3 parts of a plasticizer; the total weight part of the main material is 100 parts; the auxiliary materials comprise 0.1%-0.5% of a sintering aid, 0.1%-0.3% of a water reducing agent and 4%-7% of a solvent, wherein the sintering aid accounts for 0.1%-0.5% of the main materials; the coating material prepared according to the ratio provided by the invention has the normal-temperature compressive strength of 90-150 MPa and the high-temperature breaking strength of 5-10 MPa; the thickness is 110 to 130 mm; the normal-temperature abrasion loss is 2.8 cm < 3 > to 4 cm < 3 >; and the slag sluice can be generally used for 3-5 years in blast furnace slag sluices.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, in particular to a high-strength wear-resistant smear and its application. Background technique [0002] The iron and steel smelting system has many containers and transportation channels that have been subjected to material erosion and wear for a long time, such as the lining of blast furnace slag ditch, the lining of blast furnace silo and tank, and the lining of coke tank used for coke transportation in CDQ ovens. Some of these areas have higher operating temperatures, such as the maximum temperature of the coke tank lining can reach 1000°C when it contacts red coke; Slag washing water is corrosive to a certain extent and easily produces hydrogen and carbon monoxide; some stored materials are easy to freeze and harden due to poor thermal insulation performance, such as blast furnace silos. The inner linings of these containers and materials are generally made of metal linings. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66F27D1/16
CPCC04B35/66F27D1/16C04B35/62204C04B2235/3418C04B2235/3217C04B2235/3222C04B2235/447C04B2235/448C04B2235/3826C04B2235/3409C04B2235/3436C04B2235/349C04B2235/96C04B2235/77
Inventor 钟凯温太阳崔园园杨彬曹勇王岐王卫兵
Owner SHOUGANG CORPORATION