Mixed type iron ore roasting furnace
An iron ore and roasting furnace technology, applied in the field of roasting furnaces, can solve the problems that the blast furnace ironmaking cannot be well satisfied, the process parameters cannot be effectively controlled, and the roasted ore iron has a low grade, and achieves good sealing, long service life, The effect of high fuel efficiency
Inactive Publication Date: 2009-09-23
CHONGQING IRON & STEEL (GRP) CO LTD
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Problems solved by technology
The above-mentioned device is also not suitable for the above-mentioned red (brown) iron ore-siderite mixed iron ore distributed in Qijiang County, Chongqing City. The processing cost is high, the process parameters cannot be effectively controlled, the roasting time is long, the reduction process is slow, High energy consumption and cost; and the grade of roasted ore iron obtained from the treatment is low, which cannot well meet the needs of blast furnace ironmaking
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[0014] Such as figure 1 , 2 Middle, 1—furnace body, 2—heat-resistant furnace lining, 3—furnace hearth, 4—feeding device, 5—ventilation and smoke exhaust device, 6—combustion chamber, 7—fire viewing hole, 8—fire guiding hole, 9—furnace Door, 10—ash discharge door, 11—fire grate, 12—air duct, 13—heat-resistant reinforced lining, 14—wear-resistant lining,
[0015] The hybrid roasting furnace of the present invention includes a furnace body 1, the furnace body 1 is mainly composed of a supporting steel frame and a heat-resistant furnace lining 2, and the middle is a furnace 3; the upper part of the furnace 3 is a preheating zone, the middle is a heating zone, and the lower part is a cooling zone. The temperature in the heating zone is the highest; on the upper part of the furnace body 1, there is a feeding device 4 for adding iron ore to be roasted to the furnace 3. The feeding device 4 has full-automatic and semi-automatic feeding devices according to the needs, which can meet t...
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The invention discloses a hybrid iron ore roasting furnace, which comprises a furnace body, a heat-resistant furnace lining, a furnace, a feeding device, and an exhaust and smoke exhaust device; For hot gas, there are fire observation holes, fire guide holes, furnace doors, ash discharge doors, fire grates, and air pipes on or in the combustion chamber; the fire guide holes are set on the furnace body, and the combustion chamber communicates with the furnace through the fire guide holes . The hybrid iron ore roaster of the present invention, the roaster adopts solid fuel (anthracite), the fuel utilization rate is high, the heat consumption of the roaster is low, the average is less than 300,000 kcal / ton, and fuel is saved; it is especially suitable for those without natural gas and coal gas the needs of the region. The furnace door switch is flexible and well sealed, which can keep the negative pressure in the furnace within the set value required by the process. After the red (brown) iron ore-siderite mixed iron ore is roasted, the iron grade of the roasted ore obtained is higher than 50%, which can meet the needs of blast furnace ironmaking.
Description
technical field [0001] The invention relates to a smelting equipment, in particular to a roasting furnace for roasting red (brown) iron ore-siderite mixed iron ore. Background technique [0002] In the iron ore smelting process, the iron ore is usually roasted in a roaster. However, because lean ore accounts for more than 90% of my country's iron ore resources, there are few rich ores; especially a red (brown) iron ore-siderite mixed iron ore distributed in Qijiang County, Chongqing City. Complex, a variety of minerals symbiotic, in addition to siderite, followed by hematite, and a small amount of magnetite, semi-pseudo-hematite and limonite. The content of metal sulfide is extremely low, and only sporadic distribution of pyrite is seen. The gangue minerals are mainly quartz, followed by chlorophyllite, oolitic chlorite, illite and apatite. Other trace minerals include calcite, dolomite, plagioclase, biotite, muscovite, zircon, rutile and epidote, etc.; the cloth particle ...
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IPC IPC(8): F27B1/08F27B1/10F27B1/14
Inventor 舒西刚赖维远康健邓彬魏红琼
Owner CHONGQING IRON & STEEL (GRP) CO LTD