A kind of dry low-carbon environment-friendly gun clay and its preparation method

Abstract

The invention relates to a dry-type low-carbon environment-friendly stemming and a manufacturing method thereof. The dry-type low-carbon environment-friendly stemming mainly comprises 10-35 wt% of corundum, 10-25 wt% of flint clay, 10-20 wt% of bauxite, 5-20 wt% of SiC, 3-8 wt% of ferrosilicon nitride, 10-20 wt% of fireclay, 0-5 wt% of alpha-Al2O3 micropowder, 1-3 wt% of silicon micropowder, 3-6 wt% of sericite and 8-10 wt% of asphalt. The additives comprise 0.5-2 wt% of oleic acid, 0-3 wt% of paraffin and 0-3 wt% of thermoplastic phenol formaldehyde resin. The method is green and environmentally friendly, is simple in production technique, and is similar to the production of a common powdery refractory material. The stemming has scour resistance, corrosion resistance, high tendency to opening, no reaming, no wattenschlick, high tendency to sintering, no environment pollution, high productivity, easy field operation and other favorable characteristics of the favorable stemming, is hopeful to lowering the national blast-furnace stemming consumption to less than 1 kilo per ton of iron, and is worthy of widespread popularization and application.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a dry low-carbon environmentally friendly gun clay and a manufacturing method thereof. Background technique [0002] Gun mud is the mud-like material used to block the iron hole in blast furnace ironmaking. It is called gun mud because it is pressed in by a mud gun. [0003] When the blast furnace is small, the furnace capacity is only 50m 3 In the following times, the gun mud is artificially blocked with laterite mud, and the artificial steel brazing opening can meet the requirements for use. [0004] When the furnace capacity is 200m 3 In the case of the above, the plugging must be made by pressing the clay with a clay machine, and opening with an electric drill. [0005] In the 1970s and 1980s, our country inherited a kind of 3331 water gun mud, namely: waste clay brick particles, crushed coke particles, refractory clay, and asphalt were mixed with water in a ratio of 3:...

AI Technical Summary

Problems solved by technology

The wind pressure has been increased from 150-200KPa to 300-350KPa, the wind temperature has been raised from 900°C to 1250°C, and with the addition of coal injection enriched with oxygen, foreign high-grade iron ore is used, and the blast furnace utilization factor has been raised to 3.5- 4.5t / m 3 (450m 3 The daily output of the blast furnace is more than 2000 tons, the highest is 2200-2300 tons) 2000m 3 The utilization factor of the above large blast furnaces is generally 2.5t / m 3 As mentioned above, the number of ironing times per day is 12-15 or even 18 times, and the inverted iron hole has to be reopened 20 minutes after it is blocked. The traditional 3331 gun mud is far from meeting the needs of production, so the waterless gun combined with tar was born. Mud requires the advantages of easy pressing, good drilling, corrosion resistance, erosion resistance, no expansion, no damp mud, fast hardening, etc., due to the large volatile matter of anhydrous gun mud tar, a large number of volatiles have caused environmental damage damage, especially for smog