Firing Lis'Egorsk dolomite in rotary furnace

Conclusions By calcining Lis'egorsk dolomite in a rotary furnace by the dry method (0–25 mm fraction) with 3–3.5%clinker we obtained high-grade dolomite powder with an apparent density of 3.3 g/cm³.Industrial tests of the burned dolomite showed that it is suitable as a fettling material for open-hearth furnaces.     

Intensifying the firing of dolomite in rotary kilns

Conclusions The East Institute of Refractories has developed an effective method of using oxygen for burning the fuel in rotary kilns used for calcining refractory raw materials. The essence of the method consists in feeding oxygen and gas into the combustion chamber in the form of separate jets flowing from the nozzles at sonic and supersonic velocities and aimed at the material being fired.The proposed method is being introduced on rotary kilns for firing dolomite at the Chelyabinsk Factory, as a result of which there has been a big boost in the furnace output, a fall in the specific fuel consumption and dust removal, and also improvements in the quality of the fired powder. The method may be recommended for rotary kilns for firing magnesite and other forms of raw material.Translated from Ogneupory, No. 7, pp. 9–11, July, 1980.     

The operation of rotary kilns with boiler-utilizers and electric filters

Summary Cellular heat exchangers built into the furnace enabled the specific fuel consumption to be reduced and the output of the rotary furnace to be increased, but there was an accompanying increase in dust removal.Boiler-utilizers are an effective means of reducing the temperature of flue gases and of increasing the thermal efficiency of the furnace. The wear of the boiler pipes is very low.Experience with boiler-utilizers showed that it is possible to operate them normally even when the flue gases contain a lot of dust.To obtain highly effective and steady working conditions in existing and newly erected electric filters, it is necessary for the Magnesit plant to investigate the composition and physical parameters of the flue gases and the properties of the magnesite dust, and to develop an optimum working cycle for the electric filters.     

Operation of a 170-meter rotary kiln for firing magnesite

Conclusions A rotary furnace, diameter 4.5 and length 170 m, (ratio of length to diameter 37.5 1) used for firing magnesite showed a number of advantages over furnaces with ratios of length to diameter of 251, 201. We should mention the high quality of the firing of metallurgical powder (reduction in porosity), the low consumption coefficient for raw material and specific consumption of fuel, and the low temperature of the flue gases compared with other furnaces used for firing magnesite.Translated from Ogneupory, No.1, pp.5–8, January, 1967.     

AOD炉用白云石砖的使用试验

通过AOD炉用白云石残砖的化学分析和显微结构研究,分析了AOD炉用白云石砖衬炉龄不高的原因,并提出了改进措施。冶炼过程中炉渣碱度低,氧化末期温度高和氩气、氧气、氮气三种气体压力控制不好,形成湍流,加速了风眼区材料的剥落是炉龄不高的主要原因。     

Electric furnace for firing quartz ceramics

Glass and Ceramics -     

Operation of a high-temperature shaft furnace for firing satkinskii magnesite

Experimental and theoretical investigations of the operation of high-temperature shaft furnaces for firing natural magnesite are described. It is established that due to imperfect mixing of natural gas with primary and secondary air in the furnace about 20% of the fuel does not participate in the combustion process. The prospects for developing and installing technical solutions aimed at increasing the homogeneity of the distribution of the gaseous phase components over the furnace cross-section are studied. Translated from Ogneupory, No. 8, pp. 24 – 26, August, 1994.     

Firing Dankov dolomites in a rotary furnace

Refractories and Industrial Ceramics - Calcination of Dankov dolomites in a rotary furnace by the dry method is possible without the use of fluxing additions. Samples of dolomite from the top and...     

浅谈白云石耐火砖在水泥窑的应用

环境保护问题已成为世界各国的头等大事,镁铬砖作为水泥窑烧成带的主要耐火材料,其对环境的危害性也日益明显地暴露出来。详细分析了在国外已得到普遍使用的白云石砖在烧成带使用的性能优势,在此基础上就该砖的使用疑虑及其应对措施进行了分析介绍。