Flash ironmaking system and method
First Claim
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1. A flash ironmaking system, comprising:
- a pulverized coal gasifier defining a material inlet and a coal gas outlet, and configured to mix pulverized coal, pure oxygen and steam to obtain a crude coal gas containing carbon monoxide and hydrogen;
a drying pre-reduction kiln defining a wet iron ore inlet, a block coal inlet and a charging material outlet, and configured to dry and pre-reduce wet iron ore and block coal to obtain pre-reduced iron ore; and
a flash furnace comprising;
a horizontal bottom defining a hearth in which a molten iron layer region, a slag layer region and a carburizing bed layer region are sequentially formed from bottom to top,a reduction tower defining a reduction tower chamber therein, and a lower end connected to an upper end of the carburizing bed layer region,a concentrate nozzle provided at a top of the reduction tower, connected to the charging material outlet and the coal gas outlet respectively, and configured to only feed the pre-reduced iron ore, the crude coal gas and a fuel containing pure oxygen and pea coal to the reduction tower chamber to obtain metal iron and a flue gas,a flue defining a lower end connected to the upper end of the carbonizing bed layer region, wherein a flue gas vent is formed in a side wall of the flue and communicated with the drying pre-reduction kiln.
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Abstract
A flash ironmaking system and a flash ironmaking method are provided. The flash ironmaking system includes a pulverized coal gasifier; a drying pre-reduction kiln; and a flash furnace having a horizontal bottom in which a molten iron layer region, a slag layer region and a carburizing bed layer region are sequentially formed, a reduction tower, a concentrate nozzle, and a flue.
2 Citations
9 Claims
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1. A flash ironmaking system, comprising:
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a pulverized coal gasifier defining a material inlet and a coal gas outlet, and configured to mix pulverized coal, pure oxygen and steam to obtain a crude coal gas containing carbon monoxide and hydrogen; a drying pre-reduction kiln defining a wet iron ore inlet, a block coal inlet and a charging material outlet, and configured to dry and pre-reduce wet iron ore and block coal to obtain pre-reduced iron ore; and a flash furnace comprising; a horizontal bottom defining a hearth in which a molten iron layer region, a slag layer region and a carburizing bed layer region are sequentially formed from bottom to top, a reduction tower defining a reduction tower chamber therein, and a lower end connected to an upper end of the carburizing bed layer region, a concentrate nozzle provided at a top of the reduction tower, connected to the charging material outlet and the coal gas outlet respectively, and configured to only feed the pre-reduced iron ore, the crude coal gas and a fuel containing pure oxygen and pea coal to the reduction tower chamber to obtain metal iron and a flue gas, a flue defining a lower end connected to the upper end of the carbonizing bed layer region, wherein a flue gas vent is formed in a side wall of the flue and communicated with the drying pre-reduction kiln. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification
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Current AssigneeBeijing Hengyi Zhengxing Investment Company Limited
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Original AssigneeBeijing Shantie Technology Co., Ltd.
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InventorsDeng, Shuhua, Gong, Shushan
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Primary Examiner(s)Dunn, Colleen P
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Assistant Examiner(s)Kachmarik, Michael J
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Application NumberUS15/570,629Publication NumberTime in Patent Office1,833 DaysField of SearchUS Class CurrentCPC Class CodesC21B 11/00 Making pig-iron other than ...C21B 13/0026 introduction of iron oxide ...C21B 13/0066 Preliminary conditioning of...C21B 13/0073 Selection or treatment of t...C21B 2100/44 Removing particles, e.g. by...C21B 2100/66 Heat exchangeY02P 10/134 by avoiding CO2, e.g. using...
