Waterless stemming and preparation method thereof

Abstract

The invention relates to waterless stemming and a preparation method thereof. The waterless stemming is a fireproof, corrosion-resistant, washing-resistant and wear-resistant material for blocking an iron notch and filling iron notch gaps and cracks having various shapes. The waterless stemming has the advantages that 1, the waterless stemming does not yellow, does not produce black smoke, reduces benzpyrene content to a value less than 0.01% and has good filling performances, contractibility and sintering properties, 2, strength is high and stable blast furnace conditions are kept, 3, iron is produced stably, the iron notch can be opened easily, the pore is not broadened, melt iron flow and flow velocity can be effectively controlled, and strong slag resistance, erosion resistance and washing resistance are obtained, 4, the hearth is protected, crack is not produced in fast heating and high bonding strength of novel and old stemming is high, 5, opening performances are good and a boring process can be carried out easily by a tapping machine drill bit, 6, plasticity is good and clay gun operation and iron notch mud drum formation are convenient, and 7, a certain micro-expansion performance is obtained at a high temperature, gas permeability is good, strength is high and molten iron seepage caused by stemming contraction is avoided.

Description

technical field [0001] The invention relates to the field of anhydrous taphole mud for ironmaking blast furnace tapholes in the metallurgical industry, and is a fire-resistant, erosion-resistant, erosion-resistant and wear-resistant refractory material for sealing tapholes and filling gaps and cracks of various shapes in the tapholes. Background technique [0002] Anhydrous taphole mud is a fire-resistant, erosion-resistant, erosion-resistant, and wear-resistant refractory material used in the metallurgical industry to block the tapholes of ironmaking blast furnaces and fill gaps and cracks of various shapes in the tapholes. With the development of the iron and steel industry, the smelting intensity and smelting coefficient of each ironmaking plant are constantly increasing, and the requirements for the technical standards of ironmaking blast furnace taphole mud are getting higher and higher. The traditional ironmaking blast furnace taphole mud has the following technical de...

AI Technical Summary

Problems solved by technology

The traditional ironmaking blast furnace taphole mud has the following technical defects: 1. It is not environmentally friendly and pollutes seriously

During use, under the action of the high temperature in front of the furnace, a large number of yellow chimney iron holes emerged, polluting the working environment

2. The content of benzopyrene seriously exceeds the standard

Workers are labor intensive

3. Unstable product quality

Corrosion resistance, poor erosion resistance

4. It is difficult to maintain the depth of the iron hole

5. The safety performance is poor, and accidents such as iron leakage and blasting of molten iron cause burns to workers in front of the furnace are prone to occur