Refractory cement is also known as high-temperature cement. It is made of high-quality bauxite and high-quality lime, both of which are combined with appropriate amount of ingredients in a certain proportion. The refractory degree of refractory cement is not less than 1580℃ (2876℉). It can be divided into aluminate refractory cement, low-calcium aluminate refractory cement, calcium-magnesium aluminate cement, and dolomite refractory cement according to different compositions.
Aluminate cement CA50 series products are based on natural high-quality bauxite and limestone as raw materials, calcined at high temperature to form a clinker with one calcium aluminate (CA) and one calcium dialuminate (CA2) as the main mineral phase, and then ground to the best particle size distribution of water-hard cementitious material.
CA70 cement produced by industrial alumina and high purity burnt lime from advanced rotary kiln sintering process and high fine grinding system with reasonable design of cement phase and accurate control of sintering process and particle size distribution, calcium aluminate cement has good workability,excellent performance at high temperature and maximum consistency.
CA80 alumina content suitable for the preparation of various traditional and low cement deposits, the prepared casting material has a high softening temperature, excellent slag resistance and mechanical impact resistance, and the use tempera-ture can reach 1800 ℃ . The product has extremely low content of impurities such as iron and silicon and good erosion resistance.
| Item/Grau | CA50 | CA70 | CA80 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| A600 | A700 | A900 | CA70 | CA70W | CA70S | CA71 | CA80 | CA80S | |||
| Chemical Composition | ω (SiO2) ≤/% | 7.8 | 7.5 | 5.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | |
| ω (Al2O3)/% | 50.0 | 51.0 | 53.5 | 68.5-70.5 | 68.5-70.5 | 68.5-70.5 | 69.5-71.5 | 78.0-81.0 | 78.0-81.0 | ||
| ω (Fe2O3) ≤/% | 2.5 | 2.5 | 2.5 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | ||
| ω (CaO)/% | / | / | / | 28.5-30.5 | 28.5-30.5 | 28.5-30.5 | 27.5-29.5 | 17.5-20.5 | 17.5-20.5 | ||
| ω (MgO) ≤/% | / | / | / | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | ||
| ω (R2O) ≤/% | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | ||
| ω (S) ≤/% | 0.1 | 0.1 | 0.1 | / | / | / | / | / | / | ||
| ω (Cl) ≤/% | 0.1 | 0.1 | 0.1 | / | / | / | / | / | / | ||
| Fineness | d50/μm | / | / | / | 11-4 | 8-11 | 6-9 | 10-13 | 5-8 | 5-8 | |
| -45μm ≤/% | / | / | / | 8.0 | 5.0 | 5.0 | 8.0 | 5.0 | 5.0 | ||
| Setting Time | Initial Setting Time (min) | ≥45 | ≥60 | ≥90 | 120-180 | 30-90 | 180-240 | 150-210 | 30-90 | 90-150 | |
| Final Setting Time (min) | ≤360 | ≤360 | ≤360 | 150-240 | 90-180 | 240-330 | 210-300 | 90-180 | 270-360 | ||
| Strength (ISO) | Flexural Strength/Mpa | 24h | 6.0 | 6.5 | 8.0 | 7.5-10.0 | 8.0-10.5 | 8.0-10.5 | 8.5-11.0 | 5.0-7.5 | 5.0-7.5 |
| 72h | 7.0 | 7.5 | 10.0 | 10.0-12.0 | 10.5-12.5 | 10.5-12.5 | 11.0-12.5 | 6.0-8.5 | 6.0-8.5 | ||
| Compressive Strength/Mpa | 24h | 45 | 55 | 72 | 40-50 | 45-55 | 45-55 | 50-60 | 30-40 | 30-40 | |
| 72h | 55 | 65 | 82 | 45-55 | 50-60 | 50-60 | 55-65 | 40-50 | 40-50 | ||
| 325M ≤/% | 15 | 12 | 8 | / | / | / | / | / | / | ||
| Specific Surface Areas ≥/ (㎡/kg) | 300 | 320 | 350 | / | / | / | / | / | / | ||
1. High refractoriness 2. Excellent stability 3. Good chemical resistance 4. High temperature resistance, not easy to deform 5. Chemical corrosion resistance
1.Metallurgical industry: lining and fixing of blast furnaces, converters, electric furnaces, continuous casting machine crystallizers
2.Electric power industry: fixing and lining of boilers, coal-fired and gas-fired thermal power plant furnaces, tailings ponds
3.Cement and building materials industry: rotary kilns, coolers, preheaters, kiln tails, etc.
4.Petroleum refining and chemical industry: hydrogenation reactors, distillation towers, steam pipelines, flue gas purifiers, etc.
Todo o processo de entrega é acompanhado e a equipa de especialistas da Kerui resolve as necessidades específicas do projeto com o máximo profissionalismo. Se o projeto do cliente o exigir, a equipa de especialistas da Kerui desloca-se ao país do cliente para prestar assistência técnica presencial.
Além da China continental, Kerui Refractory exportou produtos para mais de 50 países e regiões em 5 continentes em todo o mundo, incluindo Ásia, Europa, América, África e Oceania. Recebemos reconhecimento e elogios de clientes em todo o mundo, e estamos constantemente a receber pedidos de retorno e referências de clientes.