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Castable used for electric furnace slag/iron notch as well as method for pouring electric furnace slag/iron notch

A castable and electric furnace slag technology, applied in the field of refractory materials, can solve problems such as erosion, affecting the structural performance of castables, and low service life

Inactive Publication Date: 2011-04-20
PANZHIHUA WANTENG REFRACTORY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the special working conditions on site, curing and baking cannot be carried out, which will inevitably affect the structural performance of the castable; in addition, the original castables are generally high-alumina or corundum castables, but high-titanium slag severely corrodes this type of material and does not This type of material is washed by high temperature slag / iron, and the service life is generally not high, generally 10 to 30 days

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Prepare silicon carbide into particles of 0mm to 3mm and fine powder less than 180 mesh, add 60wt% silicon carbide particles, 12wt% silicon carbide fine powder, and add 8wt% Al 2 o 3 Micropowder, 5wt% of additives, kneading on a mixer mill for 3 minutes, adding 5wt% of binder, kneading for 8 minutes, and discharging, trapped material 24 hours into bags. When pouring on site, add 9%wt binder and 1wt% coagulant, mix evenly and then pouring construction, and it can be put into use within 2 hours after construction.

[0023] The silicon carbide composition is: SiC content is 91.2wt%, free carbon content is 1.7wt%, SiO 2 The content is 1.8wt%, Fe 2 o 3 The content is 1.8wt%, Al 2 o 3 The MgO content is 1.6wt%, and the MgO content is 1.5wt%. The Al 2 o 3 The powder composition is: Al 2 o 3 The content is 98.5wt%. The additive is sodium tripolyphosphate. The binding agent is phosphoric acid and aluminum phosphate. The coagulant is magnesia.

Embodiment 2

[0025] Prepare silicon carbide into particles of 0mm to 3mm and fine powder less than 180 mesh, add 56%wt silicon carbide particles, 16%wt silicon carbide fine powder, add 6wt% Al 2 o 3 Micropowder and 5wt% silicon micropowder were kneaded on a mixer for 5 minutes, 9wt% binder was added and kneaded for 5 minutes to discharge the material, and the material was bagged for 24 hours. When pouring on site, add 5wt% binder and 3wt% coagulant, mix evenly and then pouring construction, and it can be put into use within 2 hours after construction.

[0026]The silicon carbide composition is: SiC content is 94.7wt%, free carbon content is 0.7wt%, SiO 2 The content is 1.2wt%, Fe 2 o 3 The content is 1.3wt%, Al 2 o 3 The MgO content is 1.2wt%, and the MgO content is 0.8wt%. The Al 2 o 3 Micropowder composition is Al 2 o 3 The content is 99.2wt%. The silicon micropowder composition is SiO 2 The content is 97.2wt%. The binding agent is sodium hexametaphosphate and phosphoric aci...

Embodiment 3

[0028] Prepare silicon carbide into particles of 0mm to 3mm and fine powder less than 180 mesh, add 60wt% silicon carbide particles, 13wt% silicon carbide fine powder, 4wt% silicon micropowder, 3wt% additives, and knead on a mixer for 5 minutes , add 8wt% binder and knead for 5 minutes to discharge the material, and bag the trapped material for 24 hours. When pouring on site, add 8wt% binder and 4wt% coagulant, mix evenly and then pouring construction, and it can be put into use within 2 hours after construction.

[0029] The silicon carbide composition is: SiC content is 97.6wt%, free carbon content is 0.2wt%, SiO 2 The content is 0.7wt%, Fe 2 o 3 The content is 0.5wt%, Al 2 o 3 The content of MgO is 0.4wt%, and the content of MgO is 0.2wt%. The silicon micropowder composition is SiO 2 The content is 95.3wt%. The additives are carboxymethyl cellulose and calcium lignosulfonate. The binding agent is phosphoric acid and aluminum phosphate. The coagulant is cement.

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Abstract

The invention provides a castable used for electric furnace slag / iron notch and a method for pouring the electric furnace slag / iron notch. The castable used for the electric furnace slag and the iron notch comprises the following components by weight percent: 50-60wt% of carborundum grains, 12-16wt% of silicon carbide fine powder, 0-8wt% of Al203 micro powder, 0-5wt% of silicon micro powder, 0-5wt% of additive, 5-9wt% of binding agent, additionally added 5-9wt% of binding agent and 1-4wt% of coagulant, wherein the carborundum grains, the carborundum fine powder, the Al203 micro powder, the silicon micro powder and the additive are mixed on a mixing mill after being blended; adding the binding agent, milling and souring. When the castable is poured on site, the binding agent and the coagulant are additionally added and evenly stirred to obtain the castable used for the electric furnace slag and the iron notch, wherein the additive is at least one of sodium hexametaphosphate, sodium tripolyphosphate, carboxymethylcellulose and calcium lignosulphonate; and the binding agent is at least one of the sodium hexametaphosphate, phosphoric acid and aluminium phosphate.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a castable for electric furnace slag / taphole and a method for pouring electric furnace slag / taphole with the castable. Background technique [0002] In the process of smelting high-titanium slag using electric furnace, the slag / iron port is the channel for the slag / iron to flow out, and the service life of the slag / iron port directly affects whether the high-titanium slag smelting process can be carried out smoothly. In the process of smelting titanium slag, the service life of the slag / tiekou refractory is very low, which directly affects the production of titanium slag. [0003] Due to the high melting temperature of high-titanium slag, the smelting temperature is high. The normal slag discharge temperature is about 1750°C, and it can reach above 1900°C during the intensive smelting of the electric furnace. Electric furnace slag / taphole is generally cast on site, ...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 陈家伟黄百卫张连和秦兴华田洪倪健军
Owner PANZHIHUA WANTENG REFRACTORY MATERIALS
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