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A kind of pump pressure-feeding buffer filler for hot-state maintenance of hot blast stove system

A hot blast stove and pump pressure technology, which is applied to the field of pump pressure feeding buffer packing for hot blast stove system thermal maintenance, can solve the problems of convenience of use and limit the popularization and application of buffer materials, and achieve the effect of preventing the flow of hot air flow and reducing the temperature of the furnace shell. Effect

Active Publication Date: 2016-07-27
BEIJING SHOUGANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A relatively effective grouting treatment method is to use fiber balls in the repair grouting material. The balls are usually good for pumping, but because the fiber balls used need to be specially made, compared with the soft and popular fiber cotton The convenience and cost of repair grouting materials containing fiber balls limit the popularization and application of such cushioning materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] According to the ratio of 10%wt of fiber cotton, 37%wt of refractory base material, and 53%wt of composite binder, the three are combined into one, and stirred into a uniform paste to prepare the required pumpable buffer filler. Among them, the fiber cotton is a composite of aluminum silicate fiber and high-alumina fiber currently available on the market, and is ground into fiber pieces with a length of 5 mm and a width of 2 mm, and is evenly dispersed in the refractory base material by a mixer; the refractory base material is It is composed of high alumina bauxite and clay; the composite binder is a liquid substance composed of silica sol and starch, and the composite ratio of silica sol and starch is 8:1.

[0019] Tests show that the buffer filler obtained in this example has good softness, no segregation of fiber cotton and refractory base material during extrusion, good pumping performance, compressive strength not less than 2MPa, and hot compressibility not less tha...

Embodiment 2

[0022] According to the ratio of 12.5%wt of fiber cotton, 34.5%wt of refractory base material, and 53%wt of composite binder, the three are mixed and stirred into a uniform paste to prepare the required pumpable buffer filler. Among them, the fiber cotton is composed of currently commercially available alumina fiber and mullite fiber, which is ground into 4mm long and 3mm wide fiber sheets, and is evenly dispersed in the refractory base material by stirring with a stirring device; the refractory base material The material is composed of raw clay, bentonite and alumina micropowder; the compound binder is a liquid substance composed of water glass, carboxyethyl cellulose and phenolic resin, and the compound ratio of the three is 6:2:3.

[0023] The test shows that the buffer filler obtained in this example has good softness, no segregation between the fiber cotton and the refractory base material during the extrusion process, has pumpability, compressive strength not less than 1....

Embodiment 3

[0026] According to the ratio of 17.5%wt of fiber cotton, 32.5%wt of refractory base material, and 50%wt of composite binder, the three are mixed and stirred into a uniform paste to prepare the required pumpable buffer filler. Among them, the fiber cotton can be a composite of currently commercially available aluminum silicate fiber, alumina fiber and zirconia fiber, and is ground into fiber pieces with a length of 2mm and a width of 2.5mm, and is stirred by a stirring device to be evenly dispersed in the In the refractory base material; the refractory base material is composed of high alumina bauxite, clay and bentonite; the compound binder is a liquid substance composed of silica sol, phenolic resin and gum arabic, and the compound ratio of the three is 10:1: 1.

[0027] Tests show that the buffer filler obtained in this example has good softness, no segregation of fiber cotton and refractory base material during the extrusion process, has pumpability, compressive strength n...

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Abstract

The invention provides a pump pressure-delivered buffer filler for hot-state maintenance of a hot blast stove system. The composition includes 8-18% of fiber cotton, 30-39% of refractory base material and 50-55% of composite binder in mass percentage. The hot-state maintenance of the hot-blast stove system provided by the present invention uses a pump to pressure-feed the buffer filler. The fiber cotton used in the buffer filler does not need to be spheroidized, and the pump-feeding can be realized, and the hot-state pump pressure injection maintenance of the hot-blast stove system can be realized. Stop the flow of hot air and reduce the temperature of the furnace shell.

Description

technical field [0001] The invention belongs to the technical field of ironmaking, and in particular relates to a pump for pressure-feeding a buffer filler for hot-state maintenance of a hot blast stove system. Background technique [0002] The hot blast stove is one of the key equipment for ironmaking production. With the improvement of blast furnace utilization factor and blast temperature level, especially the enhanced smelting operation, the problems of hot blast furnace air supply capacity and safety production have become increasingly prominent. During the use of the hot blast stove, due to the long-term high air temperature, high air pressure and cold and heat cycle, the furnace lining is extremely unfavorable for use. After the hot blast stove has been running for a period of time, there will be gaps between the refractory material and the furnace shell (especially the hot blast pipe) due to various reasons, and the high-pressure air can almost gradually hollow out ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 郑敬先芦文凯马金芳常醒民王桂才邵俊宁曹勇杨晓婷蔡景春郑雅青肖丽莹
Owner BEIJING SHOUGANG CO LTD
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