|
|
|
| Study on material temperature increasing rule for preparing ultrafine iron powder by carbon thermal reduction in steel strip furnace |
| GUO Pei-min，WANG Duo-gang，WANG Lei，KONG Ling-bing |
| The State Key Laboratory for Advanced Iron and Steel Processes and Materials，Iron and Steel Research Institute Beijing 100081，China |
|
|
|
|
Abstract In this paper，the heating temperature distribution of superfine iron powder and carbon powder mixture in steel strip furnace was studied by establishing the heating model of material in steel strip furnace. The main research results show that the material temperature is symmetrical distribution with the center of material thickness as the symmetrical point，the upper and bottom temperature is high，and the center temperature is low，when mixture of pure iron concentrate powder and carbon powder heating from the top and bottom of steel strip furnace. The thinner the material is，the higher the central temperature of the material is，and the shorter the heating time is. 50 mm material can be heated to 800 ℃ in 28 minutes，while 150 mm material can not reach 800 ℃ in 2 h. When the average temperature is heated to 800 ℃，the relationship between the time and the material thickness h is as follows： τ/min ＝13.24－0.021 h/mm ＋0.006 4h2.
|
|
Received: 14 July 2019
|
|
|
|
|
|
|
2020, Vol. 30 
