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Liner making technique for casting lander of blast furnace with single iron notch, and free from baking casting material for iron notch

A technology for blast furnace iron tapping and iron trough castables, which is applied in the direction of discharge devices, etc., to achieve the effects of improving economic benefits, reducing labor intensity, and extending service life

Active Publication Date: 2009-12-30
北京联合荣大工程材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no baking-free castable suitable for lining or repairing the iron trench, and there is no process plan and practice of using a baking-free castable for lining the iron trench of a single-tap furnace

Method used

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  • Liner making technique for casting lander of blast furnace with single iron notch, and free from baking casting material for iron notch
  • Liner making technique for casting lander of blast furnace with single iron notch, and free from baking casting material for iron notch
  • Liner making technique for casting lander of blast furnace with single iron notch, and free from baking casting material for iron notch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] For a volume of 500m 3 ~1000m 3 Between blast furnaces, the material ratio for main ditch pouring is as follows:

[0068]

[0069] The first 13 materials in the above ingredients are mixed evenly to form a premix for later use. When in use, the premix is ​​mixed with the industrial phosphoric acid solution and phenolic resin referred to in items 14 and 15 to form a mortar for pouring.

[0070] The process of using non-baking iron ditch castables for iron ditch lining is as follows:

[0071] The cross-section of the iron ditch is shown in figure 1 shown. figure 1 Among them, 1 is the formwork, 2 is the non-baking main ditch castable, and 3 is the permanent refractory brick at the bottom of the ditch.

[0072] When pouring iron trenches, first clean up the residue at the bottom of the trench; support the mold in advance (wooden mold or steel mold, the inner wall of the formwork should be pre-brushed with engine oil to facilitate demoulding), and then put the mixed ...

Embodiment 2

[0080] For a blast furnace with a volume of 500m 3 For the following blast furnaces, the material ratio for main ditch pouring is as follows:

[0081]

[0082] The first 13 materials in the above ingredients are mixed evenly to form a premix for later use. When in use, the premix is ​​mixed with the industrial phosphoric acid solution and phenolic resin referred to in items 14 and 15 to form a mortar for pouring.

[0083] The process of using non-baking iron ditch castables for iron ditch lining is as follows:

[0084] The cross-section of the iron ditch is shown in figure 1 shown. figure 1 Among them, 1 is the formwork, 2 is the non-baking main ditch castable, and 3 is the permanent refractory brick at the bottom of the ditch.

[0085] When pouring iron trenches, first clean up the residue at the bottom of the trench; support the mold in advance (wooden mold or steel mold, the inner wall of the formwork should be pre-brushed with engine oil to facilitate demoulding), an...

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Abstract

This invention relates to a bake-free casting material and method for casting the lining of iron runner in a blast furnace. The method comprises: cleaning residues at the bottom of the iron runner of a blast furnace, supplying a mold, stirring the bake-free casting material slurry, pouring into the mold, tamping with an insertion-type vibration stick to discharge bubbles and obtain compact casting material. The casting material is suitable for casting the lining of iron runner in a 1000 m3 or lower blast furnace with a single iron outlet, and the obtained lining of iron runner can be directly used for discharging molten iron after hardened without being baked. By the method, the lining of iron runner has compact surface and inside, so the iron runner has a long service life. The method has such advantages as low material consumption, low cost, few waste residues and low labor intensity.

Description

technical field [0001] The invention relates to a baking-free pouring material for an iron trough and a casting and lining process method for a single tap hole blast furnace tapping trough, and belongs to the technical field of a single tapping hole blast furnace tapping trough lining process and materials used for lining. Background technique [0002] High-quality Al2O3-SiC-C low-cement castables have been widely used in the tapping trough of modern large blast furnaces. Due to the high pouring density of castables, refractory castables are more resistant to erosion than refractory ramming materials of the same material, and thus have a longer service life. However, the iron trench poured by the traditional Al2O3-SiC-C low-cement refractory castable must be cured, hardened, baked and dried before it can be put into use. Long time (interval of 1 day or even several days). [0003] Generally, large blast furnaces have more than two tap channels, so when one of the iron chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/14C04B35/10
Inventor 章荣会
Owner 北京联合荣大工程材料股份有限公司
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