|
|
|
| Improvement of Sinter Properties With Ultra Fine-Sized Iron Concentrate by HPRG |
| FAN Jian-jun1,2,QIU Guan-zhou1,JIANG Tao1,GUO Yu-feng1,MU Ke-lang1 |
��1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083,Hunan, China
2. Taiyuan Iron and Steel Group Co��, Ltd��, Taiyuan 030003, Shanxi, China�� |
|
|
|
|
Abstract The experiments were conducted on the changes of sintering performance of one kind of ultra fine-sized iron concentrate with or without being processed by high pressure roll grinding (HPRG). The experimental results indicate that the specific surface area increases from 1723��0 to 2201��6 cm2/g when the iron concentrate is processed by HPRG. The permeability of sintering mix increases and the iron concentrate becomes easy to react with CaO reagent at high temperature. The effect gets intensified when iron concentrate and lime are processed together by HPRG. The further studies indicate that compared with the base case, the sinter quality also gets improved, in which the yield of sinter increases from 67��24% to 69��52% and further to 71��68%, the tumble index (TI) increases from 60��38% to 62��13% and further to 64��45%, and the productivity increases from 1��42 to 1��57 t/(m2��h) and further to 1��62 t/(m2��h) when the iron concentrate is processed by HPRG or is processed with lime together. The metallurgical properties of sinter also get improved when the iron concentrate is pretreated by high pressure roll. The results indicate that it is conducive to the increase of sinter quality and productivity when the iron concentrates are processed by HPRG.
|
|
Received: 16 July 2012
Published: 16 September 2013
|
| Fund:Program for New Century Talents in University |
|
|
|
| [1] |
ZHAO Lu-peng��WU Keng��ZHU Li����CHEN Xiao-min��QIN Xuan-ke. Prediction model of sinter properties based on BP neural network[J]. Chinese Journal of Iron and Steel, 2017, 52(9): 11-15. |
| [2] |
CHANG Jin,ZHANG Xin- jian,LIU Qing- cai,REN Shan,WANG Xiao- qing,ZHOU Jian. Effect of sintering raw materials with municipal sludge on sintering process and sinter quality[J]. Chinese Journal of Iron and Steel, 2017, 29(9): 711-716. |
| [3] |
ZHU De- qing��XU Meng- jie��PAN Jian��YANG Cong- cong��TIAN Hong- yu. Experimental research to improve ballability of ultrafine concentrate[J]. Chinese Journal of Iron and Steel, 2017, 29(9): 704-710. |
| [4] |
GUO Yu- feng,,GUO Xing- min. Effect of MgO on low temperature reduction process of hematite fines sinter[J]. Chinese Journal of Iron and Steel, 2017, 29(9): 697-703. |
| [5] |
MIN Yi,,FENG Yu- tao,QIN Chong- da,,LI Wen,SHI Pei- yang,,WEI Heng. Effect of municipal solid waste incineration fly ash addition on property of iron ore sinter[J]. Chinese Journal of Iron and Steel, 2017, 29(8): 610-615. |
| [6] |
HUANG Xiao-bo,XUE Zheng-liang,WANG Wei,L�] Xue-wei. Numerical simulation on packing behavior of iron ore granules[J]. Chinese Journal of Iron and Steel, 2017, 29(7): 536-543. |
|
|
|
|
2013, Vol. 20 
