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Castable for blast furnace slag spout

A blast furnace slag and castable technology, applied in the field of castables, can solve the problems of high production cost, large workload and low service life, and achieve the effects of improving service life, improving use effect and improving performance

Inactive Publication Date: 2017-04-26
PANZHIHUA GANGCHENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, the service life of the castable is only 10-15 days, and the service life is low. Frequent replacement of castables leads to high production costs and excessive workload

Method used

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  • Castable for blast furnace slag spout
  • Castable for blast furnace slag spout
  • Castable for blast furnace slag spout

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Select corundum slag, the chemical composition of corundum slag is calculated as Al by weight percentage 2 o 3 ≥75%, MgO11~14%, CaO8~10%, Fe 2 o 3 ≤1%.

[0017] Prepare raw materials according to the mix ratio in Table 1

[0018]

[0019] Table I

[0020] Mix the above-mentioned various raw materials according to the mixing ratio in Table 1, then stir them into bags in the mixer, add water and stir them for more than 5 minutes when in use; pour the mixed materials into the mold poured by the slag ditch nozzle, and give them by vibrating rods. Vibration is applied to the castable to achieve the purpose of flow forming; the castable is demolded after natural hardening and drying, and is put into use after being naturally dried for 6 hours under the on-site temperature conditions.

[0021] The performance of the castable obtained by testing: the bulk density at 110°C is greater than 2.6g / cm 3 , 110°C drying compressive strength greater than 22Mpa, compressive stre...

Embodiment 2

[0023] Select corundum slag, the chemical composition of corundum slag is calculated as Al by weight percentage 2 o 3 ≥75%, MgO11~14%, CaO8~10%, Fe 2 o 3 ≤1%.

[0024] Prepare raw materials according to the mix ratio in Table 2

[0025]

[0026] Table II

[0027] Mix the above-mentioned various raw materials according to the mixing ratio in Table 2, then stir them into bags in the mixer, add water and stir for more than 5 minutes when in use; pour the mixed materials into the mold poured by the slag ditch nozzle, and give them to the mold through the vibrating rod Vibration is applied to the castable to achieve the purpose of flow forming; the castable is demolded after natural hardening and drying, and is put into use after being naturally dried for 6 hours under the on-site temperature conditions.

[0028] The performance of the castable obtained by testing: the bulk density at 110°C is greater than 2.8g / cm 3 , 110°C drying compressive strength greater than 27Mpa, c...

Embodiment 3

[0030] Select corundum slag, the chemical composition of corundum slag is calculated as Al by weight percentage 2 o 3 ≥75%, MgO11~14%, CaO8~10%, Fe 2 o 3 ≤1%.

[0031] Prepare raw materials according to the mix ratio in Table 3

[0032]

[0033] Table three

[0034] Mix the above-mentioned various raw materials according to the mixing ratio in Table 3, then stir them into bags in the mixer, add water and stir for more than 5 minutes when in use; pour the mixed materials into the mold poured by the slag ditch nozzle, and give them to the mold through the vibrating rod Vibration is applied to the castable to achieve the purpose of flow forming; the castable is demolded after natural hardening and drying, and is put into use after being naturally dried for 6 hours under the on-site temperature conditions.

[0035] The performance of the castable obtained by testing: the bulk density at 110°C is greater than 2.7g / cm 3 The compressive strength is greater than 25Mpa when drie...

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Abstract

The invention discloses castable and particularly relates to castable for a blast furnace slag spout. The castable for the blast furnace slag spout is prepared by mixing raw materials in parts by weight as follows: 31-33 parts of corundum slag with the particle size ranging from 5 mm to 10 mm, 45-55 parts of corundum slag with the particle size ranging from 2 mm to 5 mm, 15-28 parts of corundum slag with the particle size ranging from 0.045 mm to 2 mm, 10-15 parts of corundum slag with the particle size smaller than 0.045 mm, 4-6 parts of aluminum oxide, 2-4 parts of silicon carbide, 4-5 parts of heat-resistant steel fibers and 0.05-0.15 parts of a water reducing agent. The castable for the blast furnace slag spout is low in cost and long in service life.

Description

technical field [0001] The invention relates to a casting material, in particular to a casting material used for a blast furnace slag ditch nozzle. Background technique [0002] The general requirements for refractory materials for domestic large and medium-sized blast furnace slag ditch nozzles are: high temperature resistance, erosion resistance, erosion resistance, penetration resistance, high thermal conductivity, especially high temperature resistance. Al 2 o 3 - SiC castables, whose raw materials are mainly corundum and silicon carbide, are relatively expensive, and the price of corundum is 3,000-6,000 yuan per ton. [0003] The aluminothermic method is the main method for producing ferrovanadium in China. There is a mature process for producing high-vanadium ferrovanadium by aluminothermic method. The by-product in the production process is corundum slag. At present, it is limited to the secondary extraction of residual vanadium and the replacement of a small amount...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/101
CPCC04B35/66C04B35/101C04B2235/3206C04B2235/3208C04B2235/3272C04B2235/3826C04B2235/447C04B2235/5216C04B2235/77C04B2235/96
Inventor 张远春黎光正陈涛毛朋陈桂卫
Owner PANZHIHUA GANGCHENG GROUP
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