FAQ

1、What raw material need for pig iron, nickel iron, manganese iron smelting?

Raw material for pig iron smelting: iron ore, coke and limestone, and main iron ore are hematite (Fe2O3), magnetite (Fe3O4) and limonite2Fe2O3.3H2O.

Raw material for nickel iron smelting: laterite nickel ore, lime, coke, coal.

Raw material for manganese iron smelting: manganese ore, lime, coke, coal.


2、Coal quality requirement

Physicochemical Indexes






Item NameChemical indexes






Vdaf(%)GY(mm)b**(%)


No.TypeSymbolValue



1Meagre coalPM11>10.0-20.0≤5

2Meagre lean coalPS12>10.0-20.0>5-20

3Lean coalSM13>10.0-20.0  >20-50




14>10.0-20.0>50-65

4Coking coalJM15>10.0-20.0  >65*≤25.0≤150



24>20.0-28 .0>50-65≤25.0≤150



25>20.0-28 .0


5Fat coalFM16>10.0-20.0  >85*≥25.0>150



26>20.0-28 .0>85*≥25.0>150



36

≥25.0>150
61/3 coking coal1/3JM35
>65*
≤220
7Gas-fat coalQF46>37.0>85*≥25.0>220
8Gas coalQM34>28.0-37 .0>50-65≤25.0≤220



43>37.0>35-50




44>37.0>50-65




45>37.0>65*

91/2 caking coal1/2ZN23>20.0-28 .0>30-50




33>28.0-37 .0>30-50

10Weakly caking coalRN22
>5-30




32
>5-30

11Non-caking coalBN21>20.0-28 .0≤5




31>28.0-37 .0≤5

12Long flame coalCY41>37.0≤5




42>37.0>5-35


3、Limestone quality requirement

NameQuality indexes




CaO/%SiO2/%MgO/%S/%P/%
Limestone≥53.0≤1.00≤2.0≤0.015


















NameCaF2



Name of indexExtra grade IExtra grade IIGrade IGrade II
CaF2%≥98.5989796
Silica dioxideSiO20.080.090.10.15
Calcium carbonateCaCO30.080.090.10.15
SulfurS0.020.020.030.03
PhosphorusP0.0050.0050.010.01
IronFe0.050.050.10.1


4、Blast furnace coal gas application

After dust collector system, the blast furnace coal gas can be used for gas fuel, it can supply thermal power hot air furnace, sintering machine, steelmaking, coke oven or boiler of power plant.

5、The function of flux in blast furnace smelting

To separation the slag from iron, and make it smoothly flow out from furnace hearth, and remove the harmful impurities from certain basicity and guarantee the quality of pig iron.