Study On carbonization of coal with oxygen-enriched air to pruduce semi-coke at low temperature

• 1、College of Metallurgical Engineering , Xi’an University of Architecture and Technology
• 2、College of Metallurgical Engineering, Xi’an University of Architecture and Technology
• 3、Sanjiang coal chemical industry Co Ltd

Abstract：Traditional semi-coke production plants in north Shaanxi province are usually at a small scale , low efficiency and low calorific value of gas. To inprove the process, it is proposed that using oxygen-enriched combustion air and gas to provide heat and process with the low-temperature dry distillation gas mixture produced by dry distillation of high temperature gas circulation on the non-oxidation heating coal dry distillation of the oxygen-rich technical ideals to dissolve above problems. The test is carried at a pilot plant. The results showed that carbonization of coal with oxygen-enriched air is completely feasible, the content of effective components increased and the content of nitrogen reduced and calorific value of the gas increased obviously(the calorific value of gas is 2 times more than air’s) . without change the structure of traditional semi-coke production furnace.The quantity of the gas diffuses reduce greatly(approximately 3/4).It can solve the problem of the quantity of gas is to big to use effctively in the local plants.

Keywords： semi-coke carbonization of coal with oxygen-enriched air calorific value of gas