Aluminiferous casting material for blast furnace tapping and preparation method thereof

A castable and iron trough technology, applied in the field of refractory materials, can solve the problems of high cost, complicated process, secondary pollution, etc., and achieve the effect of stable performance and cost reduction

Inactive Publication Date: 2010-02-24
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the existing problems of complex utilization of aluminum ash, secondary pollution, large energy consumption, waste of some mineral components, immature industrial production technology, etc. Higher, resulting in higher cost, a blast furnace iron trough castable containing aluminum ash and its preparation method are proposed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The preparation process of castable for blast furnace tapping trough with aluminum ash added is as follows:

[0021] Raw materials→ingredients→mixer mixing→packaging→shipping→use site→stirring→adding water→stirring→vibration forming→drying→heat treatment→use

Embodiment 1

[0023] raw material:

[0024] The quality requirements of the particles and fine powder of industrial grade corundum raw materials are, Al 2 o 3 The content is generally greater than 98%, and the bulk density is greater than 3.4g / cm 3 , the particle size is ≤40mm. Among them, 40-8mm corundum raw material particles accounted for 12wt% of the total ingredients (mass fraction), 8-5mm corundum raw material particles accounted for 20wt% of the total ingredients, 5-3mm corundum raw material particles accounted for 16wt% of the total ingredients, 3-1mm corundum raw materials The particles account for 10wt% of the total ingredients, and the corundum raw material particles smaller than 1mm account for 10wt% of the total ingredients. The addition of industrial grade corundum accounts for 68wt% of the total batching (mass fraction);

[0025] The quality requirements of silicon carbide particles and fine powder are that the SiC content is required to be greater than 97%, the particle ...

Embodiment 2

[0042] raw material:

[0043] The quality requirements for the particles and fine powder of industrial-grade brown corundum raw materials are, Al 2 o 3 The content is generally greater than 90%, and the bulk density is greater than 3.4g / cm 3 , the particle size is ≤40mm. Among them, 40-8mm corundum raw material particles accounted for 5wt% of the total ingredients (mass fraction), 8-5mm corundum raw material particles accounted for 20wt% of the total ingredients, 5-3mm corundum raw material particles accounted for 15wt% of the total ingredients, 3-1mm corundum raw materials The particles account for 10wt% of the total ingredients, and the corundum raw material particles smaller than 1mm account for 8wt% of the total ingredients. The amount of electric fused brown corundum added accounts for 58wt% of the total ingredients (mass fraction);

[0044] The quality requirements of silicon carbide particles and fine powder are that the SiC content is generally greater than 90%, th...

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Abstract

The invention relates to an aluminiferous casting material for blast furnace tapping and a preparation method thereof, belonging to the technical field of fire-proof material. The main raw materials of the casting material contain industrial corundum powder, Si powder, high-temperature pitch grain powder, alumina concrete or calcium aluminum concrete, Aplha-Al2O3 superfine powder, SiO2 superfine powder and metallic silicon powder. Sodium tripolyphosphate or sodium hexametaphosphate is used as dispersing agent. Explosion-proof organic fiber and aluminum ash are added to acquire the casting material for blast furnace tapping. The casting material can be used, after adding 4% to 6% of water and mixing in the casting material, molding the mixture by pouring into a mould for blast furnace tapping, naturally hardening, drying, de-molding, drying at a temperature of 85 DEG C to 700 DEG C and removing water by performing thermal treatment. The casting material has high blast furnace slag resistant property and usability. By adopting the components Al2O3, Al, SiO2, etc., in the aluminum ash instead of the aluminum material and siliceous material in the casting material for blast furnace tapping, the invention can efficiently lower the cost of the casting material and find a new way to comprehensively use aluminum ash.

Description

technical field [0001] The invention relates to a blast furnace tapping trough castable containing aluminum ash and a preparation method thereof, belonging to the technical field of refractory materials. Background technique [0002] Aluminum ash is the solid waste after cooling and processing the molten slag produced in the production process of electrolytic aluminum or cast aluminum. The aluminum slag just out of the furnace usually contains 50% to 70% of metallic aluminum. After conventional recycling, the remaining waste aluminum ash still contains 15 to 30% of metallic aluminum. Due to the low grade, generally no further extraction of aluminum is required. And discarded. At the same time, there are 10-25% Al in the aluminum ash 2 o 3 AlN and 5-20% AlN, in addition containing relatively high alkali metal and heavy metal compounds, are piled up in the factory area or landfilled, which not only causes a waste of resources, but also brings environmental pollution. If th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C21B7/14
Inventor 刘艳改房明浩黄朝晖黄军同杨林
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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