Research of electrical resistance and beginning softening temperature of high-ash coals for melting of complex alloy

The research results are demonstrated on the electrical resistance and beginning softening temperature of the highash coals of Saryadyr, Borly and Zhamantuz deposits (Republic of Kazakhstan). Such parameters of the charge in the ore-thermal furnace provide a low fraction of the charge conductivity, and thereby contribute to the release of a main energy fraction in a reaction zone of the furnace where a metal is formed. The research results showed that a value of the electrical resistance of the charge at the non-isothermal heating to the high temperatures depends on the chemical and mineralogical composition of the charges, and on processes of phase transformations in a sample

Development of carbon ferrochrome smelting technology using high-ash coal

This article presents the results of experimental tests using coal from the Saryadyr deposit as a reducing agent for the smelting of carbonaceous ferrochrome. Large-scale laboratory tests were carried out on the smelting of carbonaceous ferrochrome in an ore-thermal furnace with a capacity of 200 kV · A. X-ray diffraction analysis of the obtained alloy and slag on a diffractometer was carried out. The presence of forsterite 2MgO·SiO2 and magnesitochromite Cr2Fe0,2Mg0,8O4 in the slag was revealed, as well as the FeCr compound and the absence of silicide compounds. The optimal percentage of replacing traditional coke with coal up to 30% (by weight) has been found, which can significantly reduce the specific consumption of quartzite in the charge

Investigation and comparison of the softening temperature of manganese ores used for the production of complex ligatures based on Fe-Si-Mn-Al

The article presents the results of studying the beginning, end and temperature range of softening of Kazakhstan manganese ores of the Bogach and Yesimzhal deposits. The experimental study was carried out using a softening unit on the Tamman furnace. The results obtained showed that the ore of the Yesimzhal Deposit has a low softening temperature compared to the ore of the Bogach Deposit, but the ore of the Bogach Deposit has the lowest softening temperature intervals. The dependence of the degree of softening of the investigated manganese ores on the temperature is established. The chemical composition was qualitatively evaluated, and the main phases in the samples of manganese ores were determined by x-ray phase studies

Melting of high-carbon ferrochrome using coal of the saryadyr deposit

The article presents the results of large-scale laboratory tests on the smelting of high-carbon ferrochrome with the replacement of parts metallurgical coke with high-ash coal from the Saryadyr deposits. According to the test results, it can be stated that the optimal percentage of replacing metallurgical coke with high-ash Saradyr coal is 30 – 40 %. During a large-scale laboratory test, it was also established that the cost of the alloy was reduced due to the partial replacement of expensive coke and removes the fluxing component of quartzite from the charge composition, and improves the TPE of the high-carbon ferrochrome smelting process

Investigation and comparison of the softening temperature of manganese ores used for the production of complex ligatures based on Fe-Si-Mn-Al

The article presents the results of studying the beginning, end and temperature range of softening of Kazakhstan manganese ores of the Bogach and Yesimzhal deposits. The experimental study was carried out using a softening unit on the Tamman furnace. The results obtained showed that the ore of the Yesimzhal Deposit has a low softening temperature compared to the ore of the Bogach Deposit, but the ore of the Bogach Deposit has the lowest softening temperature intervals. The dependence of the degree of softening of the investigated manganese ores on the temperature is established. The chemical composition was qualitatively evaluated, and the main phases in the samples of manganese ores were determined by x-ray phase studies

Development of carbon ferrochrome smelting technology using high-ash coal

This article presents the results of experimental tests using coal from the Saryadyr deposit as a reducing agent for the smelting of carbonaceous ferrochrome. Large-scale laboratory tests were carried out on the smelting of carbonaceous ferrochrome in an ore-thermal furnace with a capacity of 200 kV · A. X-ray diffraction analysis of the obtained alloy and slag on a diffractometer was carried out. The presence of forsterite 2MgO·SiO2 and magnesitochromite Cr2Fe0,2Mg0,8O4 in the slag was revealed, as well as the FeCr compound and the absence of silicide compounds. The optimal percentage of replacing traditional coke with coal up to 30% (by weight) has been found, which can significantly reduce the specific consumption of quartzite in the charge

Melting of high-carbon ferrochrome using coal of the saryadyr deposit

The article presents the results of large-scale laboratory tests on the smelting of high-carbon ferrochrome with the replacement of parts metallurgical coke with high-ash coal from the Saryadyr deposits. According to the test results, it can be stated that the optimal percentage of replacing metallurgical coke with high-ash Saradyr coal is 30 – 40 %. During a large-scale laboratory test, it was also established that the cost of the alloy was reduced due to the partial replacement of expensive coke and removes the fluxing component of quartzite from the charge composition, and improves the TPE of the high-carbon ferrochrome smelting process