Taphole clay is a refractory material used to block the iron mouth of an iron-making blast furnace. As an indispensable key material in blast furnace operation, the quality of taphole clay directly affects the operating efficiency and service life of the blast furnace.
Classification of taphole clay

Cannon clay is divided into water-based cannon clay and anhydrous cannon clay according to the different binders. Anhydrous cannon clay is further divided into tar-type and resin-type cannon clay.
The composition of waterless tapclay
Waterless tapclay is generally made of corundum, high-alumina bauxite, tanah liat, sericite, asphalt, silikon karbida, coke powder, dan lain-lain. as raw materials, and tar, resin, dan lain-lain. are used as binders. The volume density of corundum and high-alumina bauxite is relatively large, and they play the role of supporting skeleton in taphole clay, which is the basis of the strength of taphole clay, and greatly improves the ability of taphole clay to resist the scouring of iron slag solution; coke powder has good reducibility, which can protect other carbon components and maintain the reducing atmosphere of the blast furnace iron mouth, and has good thermal conductivity, can be sintered quickly and has a certain sintering strength; silicon carbide has a small thermal expansion coefficient, good thermal conductivity, and excellent thermal shock resistance, which can improve the refractoriness, volume stability, high temperature strength and anti-scouring ability of taphole clay; clay and asphalt improve the plasticity of taphole clay; sericite improves the sintering strength and plasticity of taphole clay. Anhydrous taphole clay has the advantages of no moisture phenomenon, high strength, stable iron mouth depth, small change of iron mouth during tapping, dan lain-lain. in the iron-out channel, and will not cause large flow.
Physical and chemical indicators of anhydrous taphole mud
Classification of taphole clay
Taphole clay is divided into water-based taphole clay and anhydrous taphole clay according to the different binders. Anhydrous cannon clay is further divided into tar-type and resin-type cannon clay.
The composition of anhydrous taphole mud
Waterless tapclay is generally made of corundum, high-alumina bauxite, tanah liat, sericite, asphalt, silikon karbida, coke powder, dan lain-lain. as raw materials, and tar, resin, dan lain-lain. are used as binders. The volume density of corundum and high-alumina bauxite is relatively large, and they play the role of supporting skeleton in taphole clay, which is the basis of the strength of taphole clay, and greatly improves the ability of taphole clay to resist the scouring of iron slag solution; coke powder has good reducibility, which can protect other carbon components and maintain the reducing atmosphere of the blast furnace iron mouth, and has good thermal conductivity, can be sintered quickly and has a certain sintering strength; silicon carbide has a small thermal expansion coefficient, good thermal conductivity, and excellent thermal shock resistance, which can improve the refractoriness, volume stability, high temperature strength and anti-scouring ability of taphole clay; clay and asphalt improve the plasticity of taphole clay; sericite improves the sintering strength and plasticity of taphole clay. Anhydrous taphole clay has the advantages of no moisture phenomenon, high strength, stable iron mouth depth, small change of iron mouth during tapping, dan lain-lain. in the iron-out channel, and will not cause large flow.
Physical and chemical indicators of anhydrous taphole mud
Parameter | Value |
Al₂O₃Kandungan(%) | 44-52 |
SiO₂Kandungan(%) | 15-35 |
Fe₂O₃Kandungan(%) | 1.5-2.5 |
SiC Kandungan(%) | 10-16 |
TiO₂Kandungan(%) | 1.5-4.5 |
750℃ Loss on lgnition(%) | 23-28 |
Shelf Life di 20℃ | 6 bulan |
Construction Method | Compression Molding |
Maximum Particle Saiz | 2-3mm |
Penghantaran Status | Ready to Use |
Raw Materials | Bauxite+Silicon Carbide |
Bonding Method | Resin |
Apparent Density | 2190 kg/m³ |
Plasticity di 40℃ | 200-250 kg/cm² |
Bulk Density After 800C Firing | 1940 kg/m³ |
Porosity After 800C Firing | 30% |
Compressive Strength After 800℃ Firing | 9 MPa |
Characteristics of anhydrous taphole mud
- Good workability, can be easily pushed out of the mud gun, and has a high filling density;
- Good opening performance, the drill bit of the opening machine is easy to drill into when opening;
- Resistant to the scouring and erosion of high-temperature iron;
- Good volume stability, itu dia, small volume change under high temperature;
- Refraktori yang tinggi, >1580℃;
- Has certain plasticity at room temperature

Rongsheng refractory company introduction
Rongsheng Refractory Co., Ltd. is a Chinese refractory manufacturer. In addition to taphole clay, it can also produce different types of bata tahan api, castable materials, insulation products, continuous casting refractory materials, dan lain-lain.
Packaging of anhydrous taphole clay

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