Molten iron pre-treating method and apparatus
A molten iron pretreatment and pretreatment technology, which is applied in the field of molten iron pretreatment and its pretreatment devices, can solve the problems of large investment in the construction of pretreatment facilities, large production and operation costs, increased temperature drop of molten iron, etc., and achieves compact structure and gas consumption. The effect of reducing and small construction investment
Inactive Publication Date: 2009-12-23
张登山
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Problems solved by technology
The problems of this method are: a special pretreatment workshop needs to be built, and sufficient lifting facilities are needed; to realize the uniformity of the molten iron composition, there must be a mixing facility for the molten iron; the time for the molten iron to enter the converter from the blast furnace is much longer, The temperature drop of molten iron increases; the investment in the construction of pretreatment facilities and the cost of production and operation are large
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[0071] The specific implementation of the molten iron pretreatment device and its method will be described in detail below in conjunction with the examples and accompanying drawings, but the specific implementation of the molten iron pretreatment device and its method is not limited to the following examples.
[0072] Embodiment of molten iron pretreatment device
[0073] figure 1 , figure 2 and image 3 The described molten iron pretreatment device includes a powder spraying device, a molten iron pretreatment container, a spray gun device, an agitator and a dust suction pipe. In the molten iron of the pretreatment container, the suction port of the dust suction pipe is arranged beside the molten iron pretreatment container, and the feature is that the said molten iron pretreatment container is a long strip pretreatment container arranged beside the tap branch ditch 12 in front of the blast furnace. Process reaction tank 9, pretreatment reaction tank 9 has a pretreatment r...
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Abstract
A molten iron pretreatment method and a pretreatment device thereof. The molten iron pretreatment method is to flow molten iron from a blast furnace into a pretreatment reaction tank divided into a desulfurization pretreatment section, a desiliconization pretreatment section, and a dephosphorization pretreatment section by a skimmer, The corresponding pretreatment agents are sprayed into the three pretreatment sections respectively, and the molten iron is stirred. The molten iron pretreatment device includes a powder spraying device, a molten iron pretreatment container, a spray gun device, an agitator and a dust suction pipe, and the discharge port of the powder spray device is connected to the spray gun of the spray gun device. The pretreatment reaction tank is divided into the desulfurization pretreatment section, the desiliconization pretreatment section and the dephosphorization pretreatment section by three skimmers. Above the pretreatment reaction tank is a heat-insulating, sealed and dust-proof cover, and a spray gun device. The agitator and the agitator are arranged on the dust cover, and the stirring paddles of the spray gun and the agitator extend into the molten iron. The molten iron pretreatment of the present invention is carried out synchronously with blast furnace tapping, and the required facilities and devices are simple.
Description
technical field [0001] The invention relates to a molten iron pretreatment method and a pretreatment device thereof. Background technique [0002] Hot metal pretreatment is divided into hot metal desulfurization pretreatment, hot metal desiliconization pretreatment and hot metal dephosphorization and sulfur (referred to as hot metal three desulfurization) pretreatment. [0003] The existing pretreatment method for three desalinations of molten iron is as follows: firstly perform desiliconization pretreatment of molten iron to reduce the silicon content to below 0.10% to 0.15%, and then perform dephosphorization and simultaneous desulfurization pretreatment. Hot metal desiliconization pretreatment is divided into casthouse desiliconization and hot metal tank desiliconization, in which the casthouse desiliconization is desiliconization by adding desiliconization agent in the iron gutter or swing nozzle at the same time as blast furnace tapping. There are natural drop method a...
Claims
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IPC IPC(8): C21C7/04
Inventor 张登山
Owner 张登山