Magnesia-carbon wet-process spray coating and application method thereof

A technology of wet spray coating and application method, applied in the field of refractory materials, can solve the problems of short service life, limited construction conditions and high rebound rate, and achieve the effects of reducing the consumption of refractory materials, reducing labor consumption and improving production efficiency

Inactive Publication Date: 2020-08-25
SHANDONG KEXIN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, some manufacturers use the semi-dry method of spraying paint, feeding materials and repairing materials with high asphalt content. When using the semi-dry method of repairing materials, first add a small amount of water to make the materials wet, and use high-pressure air to send the wet materials to the spray gun. , further add water to the spray gun to mix, and spray it on the repaired surface. This method has the disadvantages of large dust, high rebound rate, waste of materials, low strength of the material, and short service life.
A large amount of asphalt is added to the large surface repair materia

Method used

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  • Magnesia-carbon wet-process spray coating and application method thereof

Examples

Experimental program
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Example Embodiment

[0024] Example 1

[0025] 80% Wt of fused magnesia (200 mesh, including magnesia for preparing magnesium-carbon composites), 15% Wt of carbon materials (magnesium-carbon composites prepared by using pitch, graphite powder with a particle size of 325 mesh, and magnesia), bentonite 2.4 %Wt, water reducing agent (PC180 polycarboxylate water reducing agent) 0.2%Wt, sintering agent 2.4%Wt, etc. are pre-mixed to prepare dry mix; coagulant solution (containing composite coagulant 10%Wt) is prepared separately. During spraying construction, mix the pre-prepared dry mix with 4-6 times the mass of water as required to prepare wet mix. The wet mix has good fluidity and has a storage life of more than 2 hours. The wet material is transported to the spray gun through the pipeline under the action of compressed air or the action of the pressurized pump, and is mixed with the coagulant at the mouth of the spray gun. The ratio of the wet material and the composite coagulant is 100:0.2. Wet m...

Example Embodiment

[0026] Example 2

[0027] Fused magnesia 90% Wt (200 mesh, including magnesia for preparing magnesium-carbon composite), carbon material 3.1% Wt (using pitch, 325-mesh graphite powder, and magnesia to prepare magnesium-carbon composite), bentonite 3.4% %Wt, water reducer (PC180 polycarboxylate water reducer) 0.1%Wt, sintering agent 3.4%Wt, etc. are pre-mixed to prepare dry mix; coagulant solution (containing composite coagulant 8%Wt) is prepared separately. During spraying construction, mix the pre-prepared dry mix with 4-6 times the mass of water as required to prepare wet mix. The wet mix has good fluidity and has a storage life of more than 2 hours. The wet material is transported to the spray gun through the pipeline under the action of compressed air or the action of the pressurized pump, and is mixed with the coagulant at the mouth of the spray gun. The ratio of the wet material and the composite coagulant is 100:0.4. Wet material loses fluidity within 1 minute and has ...

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Abstract

The invention belongs to the field of refractory materials, and particularly relates to a magnesia-carbon wet-process spray coating and an application method thereof, and the magnesia-carbon wet-process spray coating is prepared by treating graphite and magnesia and matching the treated graphite and magnesia with a high-efficiency water reducing agent. The magnesium-carbon refractory material is sprayed by using a wet process to perform hot-state repair and lining making on a steel ladle, so the defects of high dust content, high rebound rate, low material bonding strength and the like of semi-dry-process spraying are overcome, the whole lining can be maintained, the service life of the steel ladle is prolonged, the consumption of the refractory material is reduced, steelmaking productionefficiency is improved, and labor consumption is reduced.

Description

technical field [0001] The patent of the invention belongs to the field of refractory materials, and in particular relates to a magnesium-carbon wet spray coating and its application method. Background technique [0002] In 2019, China's crude steel output was 900 million tons, and China is the world's largest steel exporter. As an important equipment for steelmaking, ladle has always been valued by refractory technicians. The service life of the ladle directly affects the rhythm of steelmaking production, steel output, and refractory material consumption. At present, the domestic mainstream ladle lining materials are magnesia-carbon bricks, magnesia-calcium bricks and other magnesia-containing refractory materials, as well as bauxite spinel castables and corundum refractory materials. For the inspection and repair of ladles, maintenance has always been valued by steel mills and refractory manufacturers. How to improve the service life of the ladle, reduce the consumption...

Claims

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Application Information

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IPC IPC(8): C04B35/043C04B35/047C04B35/64B22D41/02
CPCB22D41/023C04B35/043C04B35/047C04B35/64C04B2235/3217C04B2235/3272C04B2235/3409C04B2235/349C04B2235/425
Inventor 吴永明柯占龙贺恒星申娟娟张兆路张继国田守信
Owner SHANDONG KEXIN NEW MATERIALS
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