Gunning mix for main iron runner of blast furnace and preparation method thereof

A technology of main iron trench and gunning material, which is applied in the field of metallurgy, can solve problems such as the inability to realize rapid construction and put into use, affect the normal production and use of blast furnaces, and the labor intensity of construction workers is high, so as to prolong the amount of iron passing and overall use The effect of life, improving the amount of iron passing through and the overall service life, and excellent explosion-proof performance

Inactive Publication Date: 2014-09-24
孙志红
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Low-cement castables are mostly used for repairing refractory materials in the main iron trench of large and medium-sized blast furnaces. Because the working lining refractories for pouring and repairing are poorly bonded to the original residual working lining, the erosion resistance is poor; low-cement castables require maintenance after construction, and the construction cycle time Prolonged, can not achieve rapid construction and put into use, affecting the normal production and use of the blast furnace, and the labor intensity of the construction workers is high, and the high-heat environment has caused a variety of unsafe factors; The requirements for the performance of refractory materials for working lining are also getting higher and higher, the construction period is shortened and the comprehensive output is increased; the amount of iron passing at one time has developed from the initial 100,000 to 120,000 tons to the current more than 150,000 tons, according to the main iron channel of the blast furnace The analysis of the factors affecting the service life of refractory materials and construction methods in the process of use shows that the repair materials for the main iron ditch of the blast furnace must not only withstand the erosion resistance of high-temperature slag-iron and the erosion resistance of high-temperature slag-iron flow, but also must improve the rapidity of the material. Construction, rapid production and use and other requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: A gunning material for the main iron channel of a blast furnace, which is prepared from the following raw materials in weight percentage: main material: 40% of dense corundum, 30% of silicon carbide; 12% of dense corundum powder; 8% of alumina micropowder %; Excipients: composite binder 15%, explosion-proof fiber 0.05%.

[0019] The composite binder is composed of pure calcium aluminate cement accounting for 60% to 70% by weight of the total composite binder, silica powder accounting for 8% to 15% by weight of the total composite binder, and accounting for 10% by weight of the total composite binder. % to 20% metal silicon powder, 3% to 5% metal aluminum powder accounting for the weight percentage of the total composite binder, 0.5% to 1% sodium tripolyphosphate and FDN-A water reducing agent accounting for the total weight percentage of the composite binder consist of.

[0020] The AlO content in the dense corundum is 99%, and the particle size of the de...

Embodiment 2

[0022] Embodiment 2: A kind of gunning material for blast furnace main iron trough, which is prepared from the following raw materials in weight percentage: main material: dense corundum 47%, silicon carbide 25%%; dense corundum powder 12%; alumina micropowder 8%; auxiliary materials: composite binder 15%, explosion-proof fiber to 0.05%.

[0023] The composite binder is composed of pure calcium aluminate cement accounting for 60% to 70% by weight of the total composite binder, silica powder accounting for 8% to 15% by weight of the total composite binder, and accounting for 10% by weight of the total composite binder. % to 20% metal silicon powder, 3% to 5% metal aluminum powder accounting for the weight percentage of the total composite binder, 0.5% to 1% sodium tripolyphosphate and FDN-A water reducing agent accounting for the total weight percentage of the composite binder consist of.

[0024] The AlO content in the dense corundum is 99%, and the particle size of the dense...

Embodiment 3

[0026] Embodiment 3: A gunning material for the main iron channel of a blast furnace, which is prepared from the following raw materials in weight percentage: main materials: 47% of dense corundum, 30% of silicon carbide; 8% of dense corundum powder; 8% of alumina micropowder %; Excipients: composite binder 15%, explosion-proof fiber 0.05%.

[0027] The composite binder is composed of pure calcium aluminate cement accounting for 60% to 70% by weight of the total composite binder, silica powder accounting for 8% to 15% by weight of the total composite binder, and accounting for 10% by weight of the total composite binder. % to 20% metal silicon powder, 3% to 5% metal aluminum powder accounting for the weight percentage of the total composite binder, 0.5% to 1% sodium tripolyphosphate and FDN-A water reducing agent accounting for the total weight percentage of the composite binder consist of.

[0028]The AlO content in the dense corundum is 99%, and the particle size of the den...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a gunning mix for a main iron runner of a blast furnace and a preparation method thereof. The gunning mix for the main runner of the blast furnace is prepared from the following raw materials in percentage by weight: major materials: 40-47 percent of dense corundum, 25-30 percent of silicon carbide, 8-12 percent of dense corundum powder and 5-8 percent of alumina fine powder; and auxiliary materials: 10-15 percent of composite bonding agent and 0.03-0.05 percent of explosion-proof fiber. The preparation method disclosed by the invention is simple, and is easy to implement; the gunning mix is easy, convenient and rapid for constructing, the construction period is shortened greatly, and the main iron runner of the blast furnace can be put into production rapidly after gunning; the gunning mix has the characteristics of excellent explosion-proof performance, high bonding strength, high iron scrap erosion resistance, excellent erosion resistance, high thermal shock resistance, low comprehensive cost, increase in the product benefit, and the like; and the one-time iron influx of the main of a blast furnace runner of the blast furnace can be increased effectively, the overall service life of the main iron runner can be prolonged, and very good social and economic benefits are achieved.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a refractory material used in iron and steel smelting, in particular to a gunning material for the main iron channel of a blast furnace and a preparation method thereof. Background technique [0002] A blast furnace is an ironmaking shaft furnace with a circular cross section. The steel plate is used as the furnace shell, and the shell is lined with refractory bricks. The blast furnace body is divided into five parts from top to bottom: the furnace throat, the furnace body, the furnace waist, the furnace bosh, and the hearth. Due to the good technical and economic indicators of blast furnace ironmaking, simple process, large production volume, high labor production efficiency, and low energy consumption, the iron produced by this method accounts for the vast majority of the world's total iron production. [0003] Low-cement castables are mostly used for repairing refractory materi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B35/66
Inventor孙志红王玺堂张岩焦顺杰贾全利岳卫东魏红玉
Owner孙志红