High-activity MgO/nanometer carbon composite powder and its preparation method

Abstract

The invention belongs to the technical field of fireproof materials, and particularly relates to a high-activity MgO / nanometer carbon composite powder and its preparation method. The high-activity MgO / nanometer carbon composite powder is prepared from, by mass percent, 80-60% of magnesium carbonate of which grain diameter is more than 0.1 mm and not more than 0.5 mm, 15-5% of magnesium carbonate fine powder of which grain diameter is more than 0.074 mm and not more than 0.1 mm, 20-5% of reducing agent of which grain diameter is more than 44 mu m and not less more than 150 mu m, and 10-1% of catalyst; the total mass of the raw materials is 100%. The raw material is further added with hole expanding agent which is 0-1% of the total mass of the raw material. Different from the nano carbon prepared by traditional cracked phenolic resin, the composite powder of the high-activity MgO / nanometer carbon prepared by the invention applies the low-price and easy-acquired magnesite as carbon source, and has excellent performances of two raw materials; the composite powder has higher reaction activity and is more obvious in improving the comprehensive performance of the resisting materials.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a high-activity MgO / nano-carbon composite powder and a preparation method thereof. Background technique [0002] Carbon nanofibers have attracted widespread attention in recent years due to their excellent properties, and all walks of life have tried to prepare them using different methods. In the refractory industry, nano-carbon also shows excellent performance, which can improve the toughness of refractory materials, thermal shock resistance, structural stability and oxidation resistance; at the same time, nano-carbon can be better due to its small particle size. Filling into the material reduces the porosity and improves the slag resistance of the material. Therefore, in today's advocacy of low-carbon refractory materials technology, how to obtain nano-carbon has become an important part of the research and development of low-carbon refractory materia...

AI Technical Summary

Problems solved by technology

However, due to the small amount of prepared nano-carbon, it is easy to agglomerate locally, and it is easy to cause uneven dispersion when used; it is a good solution to expand the dispersion range of nano-carbon by forming doped resin

However, there are free phenols and aldehydes and other toxic substances in the use of phenolic resin, which are easy to cause harm to the surrounding environment and users; and the cost of this preparation method is relatively high; to a certain extent, it limits the use of nano-carbon in refractory materials. development and use of