刘勇, 王清波, 俞海明. Process Practice of LF Collected Dust Applied to 120 t Hot Metal Pot KR Stirring Desulphurization[J]. Special Steel, 2013, 34(5): 41-43.DOI:
783~1365 kg钙基混合脱硫剂+190 kg LF除尘灰对初始S含量0.030%~0.070%的120 t铁水进行KR搅拌脱硫预处理8 min
其终点s含量同样为0.001%~0.005%
取得较好的经济效果。
Abstract
As adding 60 ~ 80 kg high alumina slag powder (/% : 45.40A1
41.30A1
2
O
3
4.65SiO
2
1.17C
0.12P
0.33S) and 971-1535 kg calcium based mixed desulphurizer [/% :80.19CaO
6.20CaF
2
0.030(S + P)
]
in 120 t hot metal pot with 0. 030% ~0. 070% initial S content to carry out KR stirring desulphurizing pretreatment for 8 min
the end S content in hot metal is 0. 001%-0.005% . With this process the cost of desulphurizer makes up more than 70% of the total cost of desulphurization. In order to reduce production cost
the LF collected dust (/% : 4.2-8.8SiO
2
26-45CaO
7-15MgO
4-6TFe. 20-40CaC
2
10-20A1
2
O
3
0.03-0.10P) is used to replace part of mixed desulphurizer. With adding 60-80 kg high alumina slag powder and 783-1365 kg calcium based mixed desulphurizer + 190 kg LF collected dust in 120 t pot with 0.030%-0.070% initial S content in hot metal to carry out KR stirring desulphurizing pretreatment for 8 min
the hot metal end S content is also 0.001%-0.005% to get better economic effect.