Designed and developed a 600t/d sleeve kiln body structure and lining structure produced nationwide, integrating a series of advanced technologies, such as co-firing process, rotating cloth technology, cooling gas heat recovery and waste gas heat transfer technology, negative Pressure operation technology, pallet ashing technology, material drying to open kiln technology, adding support brick ring structure, increasing kiln shell cooling beam technology, optimizing arch bridge refractories structure and combustion chamber structure, reasonably determining annular space, reducing Coanda effect, Optimize vertical process layout. The successful development of this technology has achieved a completely independent design of the 600t/d sleeve kiln, which has achieved the goal of construction investment, strong adaptability and stable production. The overall technical equipment has reached the international advanced level.
Starting in 2011, active lime was produced with high CaO limestone raw materials, and the lime activity was higher than 380 mL. The calorific value of converter gas was 7106 kJ/Nm3. The actual production of converter kilns in the actual production process of 600 t/d was 560 m3/h. The consumption is 3980kJ/(kg lime), which is lower than the design index. The rapid development of China's lime industry has caused a dearth of high-quality limestone resources. We must also consider increasing the utilization rate of limestone during the selection of production processes, improving the adaptability of the process to raw materials, reducing resource consumption, and reducing production costs. The sleeve kiln lime production process has many technical advantages and has become a mainstream technology development model. However, compared with the rotary kiln, the monomer production capacity of the sleeve kiln still has no advantage. At the same time, due to the inherent characteristics of the process, the requirements for the raw material conditions are relatively harsh. In the future, the sleeve kiln technology must strengthen technological research and engineering innovation, design and develop large-scale sleeve kiln with greater productivity, and realize large-scale and high-efficiency of process technology and equipment; on the other hand, it must improve raw material adaptability and improve raw materials. Comprehensive technical measures such as structure, grain-level matching, fabric control, and kiln structure optimization are used to realize the efficient use of resources and build a high-efficiency, low-cost production process. At the same time, a variety of fuel conditions should be applied to develop and study new combustion technologies and burners that use low-calorific value blast furnace gas and regenerative combustion to reduce the consumption of high calorific value gas and fuel consumption, and effectively reduce CO2 emissions during combustion.
15-25mm Calcium Carbide: Physical and chemical properties: ores are solid brown or black block, pure white crystals (including CaC2 higher purple). Density of 2.22 g / cubic centimeter, the melting point of 2300 ° C (with CaC2 content), water immediately intense reaction to generate acetylene, and release heat, Calcium Carbide content varies with the melting point also will change.
Impurities: Caustic soda often contain calcium arsenide (Ca3As2), calcium phosphide (Ca3P2) and other impurities, and the role of water at the same time release arsine (AsH3), phosphine (PH3) and other toxic gases, so the use of Acetylene generated by calcium carbide is toxic.
Crystal structure
The most common crystal form of CaC2 is tetragonal, stable between 298K and 720K. Quartet CaC2 similar to the crystal structure of NaCl, but due to [: C≡C:] 2- ion oval, oriented, the crystal is tetragonal. In CaC2 crystal, the C-C distance is 120pm, which corresponds to the bond length of carbon-carbon triple bond, the distance between Ca and C is 259 and 282pm.
15-25Mm Calcium Carbide,Acetylene Plant Calcium Carbide,Industrial Calcium Carbide,Steel Calcium Carbide
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