China's cement industry developed rapidly, the output from the early liberation of the development of 620,000 t in 2015 to 2.35 billion t, from 1985 onwards 31 consecutive years of production and consumption ranked first in the world, the new dry cement production technology and equipment level Has been close to the international advanced level, localization of equipment has been fully meet the needs of the cement industry. However, excess capacity of cement clinker in China, cement companies operating efficiency and low efficiency. Energy saving, reduce costs as a cement enterprise to enhance the economic benefits of the inevitable. China Building Materials Federation first proposed the cement industry should vigorously develop the "second-generation new dry cement technology", its purpose is to reduce the energy consumption of cement production and enhance business efficiency.
refractory material as an indispensable lining process of cement sintering material, is the second generation of new dry process cement material support conditions. The second generation of new dry cement technology on the refractory materials put forward new requirements, and refractory configuration technology should also be compatible with.
Cement industry, the initial requirements of
refractories materials to meet the protection of the metal shell of a single function; and the development of the second generation of new dry cement technology, requiring refractories with energy saving, green, longevity efficient, safe and stable and other functions .
Energy saving
The second generation of dry cement technology in the cement clinker heat consumption standards for the 650 cal kg-1, and a large part of the calcination process of cement heat through the thermal radiation of the equipment surface dissipation. Therefore, the
refractory company material as the basis of all high-temperature equipment lining material, should not only have good performance, but also should take into account the energy-saving insulation properties.
Green
The chromium content in the cement shall not be greater than 10.00 mg kg-1. According to statistics, the water-soluble chromium (Ⅵ) in cement mainly comes from the fuel and raw materials of cement raw materials, crushing and grinding media, refractory materials (magnesia-chrome bricks) and chromium-containing wastes. For most cement companies, refractory
high insulating brick (magnesia-chrome brick) is the most important source of water-soluble chromium (Ⅵ). Magnesia-chrome bricks because of good thermal shock resistance, high temperature resistance and hanging kiln skin capacity, is still the majority of domestic cement rotary kiln for the use of high-temperature zone. According to statistics, the domestic cement enterprises average per ton of cement clinker consumption of high-temperature zone with alkaline refractories of about 244 g, assuming that half of the bricks into soluble chromium (Ⅵ) and into the cement clinker, the cement clinker Soluble chromium (Ⅵ) content will reach 10.98mg kg-1. Therefore, in the cement industry to eliminate the use of magnesia-chrome brick has been in the industry consensus, the major domestic basic refractories enterprises have developed alternative to magnesia-chrome brick refractory products used in high-quality, and in the country has been rapidly applied.
Longevity and high efficiency
New dry cement technology continues to move in the direction of large-scale development, the current Nissan 5000t and above cement clinker production line has become the minimum requirements of new projects of cement companies, Nissan 10000t or 1200t cement clinker production line in China has reached more than 10 articles. Large-scale cement production line requires the quality and stability of refractories
alumina brick should be a corresponding substantial increase in long-life, high-performance refractories in the country to promote rapidly, the current domestic cement production line refractories have been slowly from the "overhaul a year "To" three years of two overhaul, "the goal of development.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
