Method for adjusting amount of semi coke added in mixed pulverized coal for injection according to blast furnace condition
Method for adjusting amount of semi coke added in mixed pulverized coal for injection according to blast furnace condition
 CN 109,112,239 B
 Filed: 06/26/2017
 Issued: 09/14/2021
 Est. Priority Date: 06/26/2017
 Status: Active Grant
First Claim
1. A method for adjusting the amount of semicoke added in mixed pulverized coal for injection according to the condition of a blast furnace is characterized in that the amount of the semicoke added in the mixed pulverized coal for injection is adjusted and calculated by adopting the following method:
 LT＝
A+k_{1}×
FW+k_{2}×
FYL+k_{3}×
HFF+k_{4}×
PCIthe symbols in the formula;
LT is the adding amount of the semicoke in the amount of the coal powder injected per ton of iron, kg/t;
a is a constant and takes a value of 7174 kg/t;
k_{1}as a coefficient, kg/(t. DEG C.), FW is blast temperature of the blast furnace, DEG C;
k_{2}in terms of coefficient, kg/t, FYL is oxygen enrichment rate in blast air,%;
k_{3}the coefficient is kg/t, and HFF is the content percent of volatile components in the coal powder to be blown;
k_{4}the PCI is the ratio of coal injection, kg/t;
k_{1}the value is0.155 to0.164;
k is a radical of_{2}26722737;
k is a radical of_{3}Taking values of 160168;
k is a radical of_{4}The value is 0.3510.359;
FW values are 8001350 ℃
;
FYL takes the value of 0 percent to 8.0 percent;
HFF takes 8.0% 35.0%;
the PCI value is 60240 kg/t.
Chinese PRB Reexamination
Abstract
The invention discloses a method for adjusting the amount of semicoke added in mixed pulverized coal for injection according to the condition of a blast furnace, which is used for adjusting the amount of the semicoke added in the mixed pulverized coal for injection according to the invention, can reasonably and optimally adjust and control the amount of the semicoke in the pulverized coal for injection according to a calculation result, is the best way for realizing the most reasonable injection mode of the semicoke for the blast furnace, can strengthen the economy of the blast furnace production, and further realizes the most reasonable utilization of semicoke resources in the metallurgical field.
1 Claim

1. A method for adjusting the amount of semicoke added in mixed pulverized coal for injection according to the condition of a blast furnace is characterized in that the amount of the semicoke added in the mixed pulverized coal for injection is adjusted and calculated by adopting the following method:

LT＝
A+k_{1}×
FW+k_{2}×
FYL+k_{3}×
HFF+k_{4}×
PCIthe symbols in the formula; LT is the adding amount of the semicoke in the amount of the coal powder injected per ton of iron, kg/t; a is a constant and takes a value of 7174 kg/t; k_{1}as a coefficient, kg/(t. DEG C.), FW is blast temperature of the blast furnace, DEG C; k_{2}in terms of coefficient, kg/t, FYL is oxygen enrichment rate in blast air,%; k_{3}the coefficient is kg/t, and HFF is the content percent of volatile components in the coal powder to be blown; k_{4}the PCI is the ratio of coal injection, kg/t; k_{1}the value is0.155 to0.164;
k is a radical of_{2}26722737;
k is a radical of_{3}Taking values of 160168;
k is a radical of_{4}The value is 0.3510.359;
FW values are 8001350 ℃
;
FYL takes the value of 0 percent to 8.0 percent;
HFF takes 8.0% 35.0%;
the PCI value is 60240 kg/t.

Specification(s)