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Blast furnace gun mud added with SiAlON synthesized through coal ash and preparation method of blast furnace gun mud

A technology of fly ash and taphole clay, which is applied in the field of refractory materials, can solve the problems of undiscovered taphole clay for blast furnace tapholes, and uninvolved application of SiAlON materials, and achieves important economic and social benefits, good opening performance, and reduced cracking effect

Inactive Publication Date: 2013-06-26
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above patents only report on the synthesis of SiAlON materials using fly ash, but the further application of SiAlON materials is not involved, especially the application of SiAlON materials to the preparation of gun clay has not been reported
After searching relevant literature and patents, no public invention patents have been found that use SiAlON materials synthesized from fly ash as raw materials to prepare blast furnace taphole mud

Method used

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  • Blast furnace gun mud added with SiAlON synthesized through coal ash and preparation method of blast furnace gun mud

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, the raw material of gun clay adopts high alumina bauxite clinker particles and fine powder, Al 2 o 3 Content > 88%, particle size ≤ 8mm, 50 kg; silicon carbide particles and fine powder, SiC content > 90%, particle size ≤ 3mm, 19 kg; coke powder, particle size ≤ 3mm, 10 kg; clay fine powder, granules Size ≤ 0.1mm, 10 kg; asphalt powder, particle size ≤ 0.1 mm, 10 kg; SiAlON fine powder synthesized from fly ash discharged from coal-fired power plants, SiAlON phase content > 60%, particle size ≤ 0.1 mm, 1 kg; Binder tar is added, 15 kg. The performance indicators of the clay products are shown in Table 1.

Embodiment 2

[0023] Embodiment 2, the gun clay raw material adopts high alumina bauxite clinker particles and fine powder, Al 2 o 3 Content > 88%, particle size ≤ 8mm, 28 kg; silicon carbide particles and fine powder, SiC content > 90%, particle size ≤ 3mm, 20 kg; coke powder, particle size ≤ 3mm, 20 kg; clay fine powder, granules Size≤0.1mm, 15kg; asphalt powder, particle size≤0.1mm, 7kg; SiAlON fine powder synthesized from fly ash discharged from coal-fired power plants, SiAlON phase content>60%, particle size≤0.1mm, 10kg; Binder tar is added, 17 kg. The performance indicators of the clay products are shown in Table 1.

Embodiment 3

[0024] Embodiment 3, the raw material of gun clay adopts fused brown corundum particles and fine powder, Al 2 o 3Content > 95%, particle size ≤ 8mm, 28 kg; silicon carbide particles and fine powder, SiC content > 90%, particle size ≤ 3mm, 20 kg; coke powder, particle size ≤ 3mm, 20 kg; clay fine powder, granules Size≤0.1mm, 15kg; asphalt powder, particle size≤0.1mm, 7kg; SiAlON fine powder synthesized from fly ash discharged from coal-fired power plants, SiAlON phase content>60%, particle size≤0.1mm, 10kg; Binder tar is added, 16 kg. The performance indicators of the clay products are shown in Table 1.

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Abstract

The invention provides a blast furnace gun mud added with SiAlON synthesized throughcoal ash and a preparation method of the blast furnace gun mud. The gun mud is characterized in that industrial corundum particles and fine powder, silicon carbide particles and fine powder, coke powder, clay fine powder and asphalt powder are adopted and used as the main raw materials; proper SiAlON fine powder which is synthesized by the coal ash discharged by a coal fired power plant is added; and the oil tar is used as a bonding agent. The blast furnace gun mud has the beneficial effects that: 1, the prepared gun mud is excellent in the following performances, high plasticity, high bonding performance, excellent sintering performance, proper air porosity, low high-temperature volume shrinkage, high resistance to slag-iron erosion, high flushing performance, and high open performance; 2, the industrial waste that is coal ash is used as the synthetic raw material of the adopted SiAlON material, so that the cost of the raw material is low, and as a result, the production cost of the gun mud is relatively low; 3, the industrial waste that is the coal ash is used as the raw material for synthesizing the SiAlON material, and a novel mode is also provided for comprehensively utilizing the coal ash; and 4, the blast furnace gun mud has important economic benefit and social benefit.

Description

technical field [0001] The invention relates to a method for preparing blast furnace tap hole mud by adding SiAlON synthesized by fly ash and a preparation method thereof, belonging to the technical field of refractory materials. Background technique [0002] Gun clay is a refractory material used to seal the taphole in the process of blast furnace ironmaking. With the rapid development of smelting technology, factors such as large-scale blast furnaces, longer life, longer tapping time, and increased slag and iron flow have put forward higher requirements for taphole clay, requiring the sinterability and volume of the blast furnace. Stability, plugging and opening performance are better, and it has anti-slag, molten iron erosion and erosion, anti-oxidation and other properties. [0003] Si 3 N 4 It is a refractory material with excellent performance. It has the characteristics of high strength, wear resistance, corrosion resistance, oxidation resistance and thermal shock ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/599C04B35/622B09B3/00
Inventor 邱海龙刘兴平范咏莲赵军张正富陈博张雯文
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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