Titanium-containing taphole repairing stemming and preparation method thereof

Abstract

The invention discloses titanium-containing taphole repairing stemming and a preparation method thereof. The stemming is prepared from the following raw materials in percentage by mass: 15%-25% of regenerated corundum particles, 0.5%-5% of kyanite, 1%-25% of regenerated silicon carbide particles, 5%-15% of crushed materials of carbon roasting, 5%-15% of nanometer high-purity vanadium-titanium powder, 5%-15% of fine silicon carbide powder, 0.5%-8% of green silicon carbide micro-powder, 5%-25% of ferrosilicon nitride, 5%-15% of clay, 0.5%-5% of an additive and 10%-18% of a composite binding agent, wherein the composite binding agent is formed by mixing environment-friendly coal tar, environment-friendly high-temperature asphalt and a wetting agent and has a benzo(a)pyrene content of smallerthan 180 mg / kg and a moisture content of smaller than or equal to 1%. A stemming product prepared by the method is good in plasticity, easy for mud making and opening formation, moderate in drying speed, micro-expanded in high-temperature volume, high in taphole repairing capacity, small in addition amount of the composite binding agent, capable of recovering taphole depth in a short time, stablein tapping time, stable in anti-scouring performance, free of phenomena such as iron leakage and taphole breakage, and free of damp mud, dense smoke and yellow smoke during use.

Description

technical field [0001] The invention belongs to the technical field of refractory materials for metallurgy, and in particular relates to a titanium-containing tap hole repair clay and a preparation method thereof. Background technique [0002] Blast furnace is an important production equipment for metallurgical enterprises. It generally uses steel plates as the furnace shell, and the shell is lined with refractory bricks. In the production process of blast furnace, hearth erosion is the biggest safety hazard, especially the taphole area is often washed and eroded by high-temperature slag and iron, which has become the weak link of blast furnace lining. Therefore, the maintenance and repair of the tap hole has become the key to the production and operation of the blast furnace. As the key refractory material used to block the tap hole during the operation of the blast furnace, the quality and performance of gun mud directly affect the safe operation of the blast furnace. At ...

AI Technical Summary

Problems solved by technology

However, looking at the existing titanium-containing gun clay, there are often problems such as unreasonable formula, poor plasticity, low purity of raw materials, poor fire resistance, serious hole expansion, large mud consumption, and difficult maintenance of iron holes. For example, Chinese patent CN1025157789A discloses a A kind of blast furnace clay for the repair and protection of the iron hole. Although the invention uses low-cost vanadium-titanium iron powder and the operation before the furnace has been optimized, due to the low content of vanadium and titanium in the vanadium-titanium iron powder, the protection The function of the furnace is limited, and the ability to repair the iron hole is limited, and when the iron content in it is too high, it will seriously affect the high temperature strength of the gun clay

Images