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Collaborative optimization design method for molten iron KR stirring desulfurization device and stirring process

A technology of stirring desulfurization and stirring process, which is applied in multi-objective optimization, instrumentation, electrical digital data processing, etc., and can solve problems such as restrictive technology and complex influence laws

Active Publication Date: 2020-10-09
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to relevant reports, the factors affecting the radius of the rigid rotator or the forced eddy current zone r c There are many, but there are more factors affecting the mixing characteristics of the free vortex zone, and the influencing laws are complex, but the numerous empirical settings and restrictions in the patent restrict the actual application effect of the technology, and further research is still needed

Method used

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  • Collaborative optimization design method for molten iron KR stirring desulfurization device and stirring process
  • Collaborative optimization design method for molten iron KR stirring desulfurization device and stirring process
  • Collaborative optimization design method for molten iron KR stirring desulfurization device and stirring process

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Embodiment 1

[0134] like figure 1 The shown method for the collaborative optimization design of the hot metal KR stirring desulfurization device and stirring process for a 300-ton hot metal tank in a steel plant includes the following steps:

[0135] 1) A steel mill uses the original injection desulfurization molten iron tank to carry out KR desulfurization transformation. The shape of the molten iron tank is a straight cylindrical structure. The rated loading capacity of molten iron is W = 295t. The diameter of the straight section of the molten iron tank is the average diameter of the molten iron tank D = 3.853m. The total height of the inner void of the molten iron tank is 5.500m, the height of the inner void at the bottom of the rounded platform tank is 0.940m, the inner diameter of the bottom is 1.600m, and the density of molten iron is ρ=6.500g / cm 3 , it can be calculated that under the condition of the rated loading capacity of molten iron, the height H of the molten iron level is 4...

Embodiment 2

[0153] like figure 1 The shown method for the collaborative optimization design of the molten iron KR stirring desulfurization device and the stirring process of an 80-ton molten iron tank in a steel plant includes the following steps:

[0154] 1) A steel mill newly built a hot metal KR stirring desulfurization station with an 80-ton hot metal tank. The shape of the hot metal tank is a straight cylindrical structure with a spherical crown bottom. The rated loading capacity of the hot metal is W=80t. Diameter D=2.9m, take molten iron density ρ=6.500g / cm 3 , it can be calculated that under the condition of rated loading capacity, the height H of the molten iron level is 2.39m, and the inner empty height of the molten iron tank is 3.263m. The free space height of the hot metal tank h=0.873m>0.30×2.9=0.870m.

[0155] 2) According to the design experience of the molten iron KR stirring device, set the structural parameters of the stirring device and the optimal design calculation...

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Abstract

The invention discloses a collaborative optimization method for a molten iron KR stirring desulfurization device and a stirring process. according to the converter steelmaking capacity, the rated molten iron loading capacity W of a molten iron tank, the average diameter D of the molten iron tank, the molten iron depth H and the molten iron tank free space height h are determined; collaborative optimization calculation ranges of five design parameters are set; kinetic condition process parameters including the stirring vortex depth delta H<1> and the vortex liquid level surging height delta H<2> are calculated; kinetic condition process parameters including the intersecting circle radius r of a vortex surface and the upper surfaces of stirrer blades are calculated; a stirring mixing characteristic optimization criterion is established; structural parameters and process parameters of a stirring device are cooperatively calculated; and the structural parameters and the process parameters of the stirring device are cooperatively optimized. The comprehensive goals of enhancing the stirring, mixing and dispersing characteristics of a desulfurizer, improving the molten iron stirring desulfurization reaction dynamic condition, stabilizing the molten iron desulfurization effect, shortening the desulfurization stirring time, improving the molten iron KR stirring desulfurization technical economic index and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of molten iron pretreatment, in particular to an optimal design method of a KR stirring desulfurization device for molten iron. Background technique [0002] The technical process of the molten iron KR mechanical stirring desulfurization method is: a single-layer blade agitator lined with refractory material is vertically immersed in the molten iron along the center of the molten iron tank for rotation and agitation, so that the liquid surface of the molten iron generates a vortex. The feeder is added to the surface of the molten iron, and the desulfurizer floating on the molten iron surface is drawn into the molten iron by the vortex, and is discharged and floated under the action of centrifugal force and buoyancy force to realize the entrainment, discharge and floating of the desulfurizer in the molten iron Circular movement, through the continuous circulation mixing contact and surface reaction of desulfu...

Claims

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Application Information

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IPC IPC(8): C21C1/02C21C7/064G06F30/17G06F111/06G06F119/14
CPCC21C1/02C21C7/064G06F30/17G06F2111/06G06F2119/14
Inventor 欧阳德刚杨新泉邓品团陈超沈继胜朱善合孙伟朱万军杨成威刘婳
Owner 武汉钢铁有限公司
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