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Ramping material for blast furnace air supply blowpipe and forming method thereof

A molding method and a technology for ramming material, which are applied in the field of ramming material for blast furnaces, can solve the problems of unsatisfactory thermal insulation of blast furnace air supply pipes, easy burn-through and damage, etc., and achieve excellent thermal stability, good thermal insulation performance, and improved thermal insulation. Effects of properties and physico-mechanical strength

Active Publication Date: 2017-05-03
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the present invention aims to develop a ramming material for blast furnace air supply blowpipes with good thermal insulation performance, low production cost, short cycle, and easy removal after slag filling and its supporting molding method, so as to solve the problem of unsatisfactory thermal insulation of blast furnace air supply blowpipes, easy Burn-through and damage technical problems, increase air temperature to reduce production energy consumption, develop and comprehensively utilize water slag, develop circular economy, reduce costs and increase efficiency for enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Raw material ratio: 70 parts of water slag, 22 parts of high-temperature cement, 8 parts of refractory clinker powder, and 8 parts of water.

[0027] Molding method: place the blowpipe to be made at an angle of 45°, close the lower end, and put it into the mold. The mold requires a taper of 0.7° to facilitate demoulding, and wrap a layer of linoleum on the surface of the mold to facilitate demoulding. Next, water slag, high-temperature cement, and refractory clinker powder weighed according to the formula ratio were added into water, mixed and stirred for 4 minutes until uniform. Feed the evenly mixed material into the blowpipe, pound the material until it is dense with a wooden stick while feeding, until the whole blowpipe is formed, and then take out the mold to repeat the next one. The molded blowpipe can be placed at room temperature and can be used within 7 days without baking.

Embodiment 2

[0029] Raw material ratio: 65 parts of water slag, 24 parts of high-temperature cement, 10 parts of refractory clinker powder, and 12 parts of water.

[0030] Molding method: place the blowpipe to be produced at an angle of 40°, close the lower end, and put it into the mold. The mold requires a taper of 1° to facilitate demoulding, and wrap a layer of felt on the surface of the mold to facilitate demoulding. Next, water slag, high-temperature cement, and refractory clinker powder weighed according to the formula ratio were added into water and mixed and stirred for 5 minutes until uniform. Feed the evenly mixed material into the blowpipe, pound the material until it is dense with a wooden stick while feeding, until the whole blowpipe is formed, and then take out the mold to repeat the next one. The molded blowpipe is placed at room temperature and can be used after 9 days without baking.

Embodiment 3

[0032] Raw material ratio: 75 parts of water slag, 20 parts of high-temperature cement, 6 parts of refractory clinker powder, and 5 parts of water.

[0033] Molding method: place the blowpipe to be made at an angle of 50°, close the lower end, and put it into the mold. The mold requires a taper of 0.5° to facilitate demoulding, and wrap a thin iron sheet on the surface of the mold to facilitate demoulding. Next, water slag, high-temperature cement, and refractory clinker powder weighed according to the formula ratio were added into water and mixed and stirred for 3 minutes until uniform. Feed the evenly mixed material into the blowpipe, pound the material until it is dense with a wooden stick while feeding, until the whole blowpipe is formed, and then take out the mold to repeat the next one. The molded blowpipe is placed at room temperature and can be used within 5 days without baking.

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Abstract

The invention discloses a ramming mass for an air-supplying blowpipe of a blast furnace and a forming method thereof. The ramming mass is prepared from the following raw materials in parts by weight: 65-75 parts of water granulated slag, 20-24 parts of high-temperature cement, 6-10 parts of fire-resistant clinker powder and 5-12 parts of water. The forming method for the ramming mass comprises the following steps: inclining a to-be-prepared blowpipe for 40-50 degrees, closing the lower end of the blowpipe and putting the blowpipe into a mould, wherein the taper at 0.5-1 degree on the mould is required and the surface of the mould is wrapped with the separation material; weighing the water granulated slag, the high-temperature cement and the fire-resistant clinker powder at the ratio of formula, adding the water granulated slag, the high-temperature cement and the fire-resistant clinker powder into water and mixing and stirring for 3-5min until the mixture is uniform; feeding the uniformly mixed materials into the blowpipe, ramming the material to be compact while feeding, till forming the whole blowpipe, extracting the mould and repeating the preparation for the next blowpipe; standing by the formed blowpipe for 5-9 days at room temperature. The blowpipe prepared according to the forming method provided by the invention has the advantages of excellent thermal insulation property, easy removal after slag pouring, convenience in manufacturing, no requirement for baking, low production cost, short period and higher popularization and application value.

Description

technical field [0001] The invention belongs to the technical field of ramming material for blast furnaces, and in particular relates to a ramming material for blast furnace air blowing pipes and a forming method thereof. Background technique [0002] At present, many manufacturers use heat-resistant castable materials for blast furnace blowpipes. Although this method has high strength after the blowpipe is made, it has technical problems such as poor thermal insulation performance, large heat dissipation, high refractory materials and high production costs. In case of slag accident, the blowpipe needs to remove the poured slag iron and the inner lining. It is difficult to remove the inner lining when it is repaired and manufactured, which brings a lot of inconvenience to the maintenance. Water slag is a kind of industrial solid waste. With the expansion of blast furnace smelting production, the accumulation and secondary utilization of water slag have become an important is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B18/14C04B35/66B28B1/04
CPCY02W30/91
Inventor 申波李明
Owner WUKUN STEEL