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Plastic refractory for repairing clay sleeve of iron notch of blast furnace and preparation method of plastic refractory

A blast furnace tapping and plasticizing technology, which is applied in the field of refractory preparation and production, can solve the problems of injury to workers in front of the furnace, long construction time, etc., to improve construction and use performance, fast sintering speed, enhanced hardness and wear resistance performance effect

Inactive Publication Date: 2019-08-16
武汉市科达耐火有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high temperature at the taphole and the residual blast furnace gas, the construction time of the castable or ramming material is long, which is likely to cause great harm to the workers in front of the furnace

Method used

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  • Plastic refractory for repairing clay sleeve of iron notch of blast furnace and preparation method of plastic refractory
  • Plastic refractory for repairing clay sleeve of iron notch of blast furnace and preparation method of plastic refractory
  • Plastic refractory for repairing clay sleeve of iron notch of blast furnace and preparation method of plastic refractory

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Experimental program
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Effect test

preparation example Construction

[0039] The preparation method of the refractory plastic used for repairing the blast furnace tap hole mud sleeve includes the following steps:

[0040] S1. First mix and stir the components except the aluminum sulfate solution, then add 70% by weight of the aluminum sulfate solution and stir for 5 minutes to form a premix;

[0041] S2. Pack the premix in S1 into sealed bags at room temperature for trapping, the trapping time t is 36-72h, then add the remaining 30% aluminum sulfate solution to the premix and stir evenly to form primary mix;

[0042]S3. Put the primary mixture in S2 into a mud extruder for mud extrusion. The number of times n of mud extrusion is 2-6 times, and then discharge and seal the package to obtain a finished product.

Embodiment 1

[0044] Embodiment 1: In this embodiment, the components and their parts by weight are shown in Table 2 (1 part by weight=1 g or 1 part by weight=1 kg). In this embodiment, the material trapping time is t=36h, and the number of times of mud squeezing is n=2 times.

[0045] Table 2 embodiment 1-5 each component content table (weight parts)

[0046]

Embodiment 2

[0047] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the contents of each component are different, and the contents of each component are shown in Table 2.

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Abstract

The invention discloses a plastic refractory for repairing a clay sleeve of an iron notch of a blast furnace and a preparation method of the plastic refractory. The plastic refractory comprises the following components in parts by weight: 700-1000 parts of alumina, 200-700 parts of refractory clay, 160-200 parts of an aluminum sulfate solution, 2-10 parts of sodium tripolyphosphate and 1-2 parts of calcium lignosulphonate. The preparation method comprises the following steps: S1, mixing all the components except the aluminum sulfate solution, uniformly carrying out stirring, then adding 70% byweight of the aluminum sulfate solution, and carrying out stirring for 5 minutes to form a premix; S2, carrying out sealing bagging on the premix obtained in the S1 to age the premix at room temperature for 36-72 hours, then adding the remaining 30% by weight of the aluminum sulfate solution into the premix, and uniformly carrying out stirring to form a primary mixture; and S3, feeding the primary mixture obtained in the S2 into a sludge extruding machine for carrying out extruding for 2-6 times, and then carrying out sealing packaging on the discharged material to obtain the finished product. The plastic refractory has the technical effects that plasticity is high and the plastic refractory can be rapidly hardened, so that construction time is shortened, and construction safety of workers is improved.

Description

technical field [0001] The invention relates to the technical field of preparation and production of refractory materials, in particular to a refractory plastic for repairing a blast furnace taphole sheath and a preparation method thereof. Background technique [0002] Refractory plastic is a kind of plastic refractory. Plastic refractory is a kind of hard mud composed of granular and powdery materials, plastic clay and other binders and plasticizers, and then adding a small amount of water. Unshaped refractories that are paste-like and maintain high plasticity over a long period of time. The main components of plastic refractories are granular materials and powder materials, accounting for 70% to 85% of the total. The plastic has good thermal shock resistance and is easy to construct. It is suitable for various heating furnaces, soaking furnaces, annealing furnaces, hot blast furnaces, etc. It can also be used for furnace covers of small electric arc furnaces and burners o...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10
CPCC04B35/10C04B35/66C04B2235/3217C04B2235/349C04B2235/3826C04B2235/447C04B2235/48C04B2235/5427C04B2235/5436C04B2235/77C04B2235/96C04B2235/9607
Inventor 蒋宇雄周胜
Owner 武汉市科达耐火有限责任公司
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