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. Click here to get price!
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/Grade | 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 | / | / | / | / | / | / | ||
Refractory cement is widely used in the iron and steel metallurgical industry, such as the lining and fixing of equipment such as blast furnaces, converters, electric furnaces, and continuous casting machine crystallizers. It can withstand high temperature, corrosion, and mechanical wear, and protect equipment from high temperature and corrosion.
Refractory cement can also be used in the power industry, such as the fixing and lining of boilers, coal-fired, gas-fired thermal power plant furnaces, tails, and other equipment. It can withstand high temperatures and flue gas corrosion and erosion, ensuring the safe and reliable operation of equipment.
In the cement production process, some high-temperature equipment is required to burn raw materials. This equipment, such as a rotary kiln, cooler, preheater, kiln tail, etc., needs to be fixed and lined with refractory cement, which can withstand the heat generated during high-temperature calcination, protect the kiln structure and prolong the life of the equipment.
Many pieces of types of equipment in the refining and chemical industry also need to be fixed and lined with refractory cement, such as hydrogenation reactors, rectification towers, steam pipes, flue gas purifiers, etc. Refractory cement can resist high temperatures and corrosion, and protect equipment from acid and alkali, Corrosive gas.
Kerui Group has a number of international certifications, such as, ISO9001/ISO14001/OHSAS18001/CE/SGS. Besides, Kerui’s products also have many domestic certificates, the quality is very guaranteed, and they have been unanimously recognized by customers at home and abroad.
Kerui has a professional quality inspection laboratory. High temperature reheating/load softening creep test furnace;Compressive/flexural strength testing bench for refractory materials; Composition testing and inspection platform for refractory materials; Laboratory for physical/chemical properties for refractory materials.
The entire delivery process is tracked, and Kerui’s expert team solves specific project needs with the utmost professionalism. If the customer’s project requires it, Kerui’s expert team will go to the customer’s country to provide face-to-face technical support.
Besides mainland China, Kerui Refractory has exported products to more than 50 countries and regions across 5 continents across the world, including Asia, Europe, America, Africa and Oceania. We have received recognition and high praise from customers all over the world, and are constantly receiving customers’ return orders and referrals.