Feature and application of preheating equipment of conversion section in No. 4 sulphuric acid system;

All big blast furnaces in Angang adopt a double precheating equipment,including an oneself preheating equipment,additional combustion system,smoke waste heat recovery and crest type preheating stove craft etc.

A new front preheating process to get higher blast temperature on pebble stove was put forward according to low blast temperature and shortage of high heat value gas in Chinese iron and steel industry.

A new position estimation algorithm was presented which used as the theory foundation to design a full digital position estimation hardware scheme that can implement on FPGA (Field Programmable Gate Array),and gived the designs of all modules.