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design method of molten iron KR desulfurization stirrer

A design method and agitator technology, which are applied in the fields of instrumentation, calculation, electrical digital data processing, etc., can solve the problem that the structural parameters of the agitator cannot be provided, and the reliable and effective stirring, mixing and dispersing conditions and reaction kinetic conditions of the KR stirred reactor cannot be guaranteed. , differences in technical and economic indicators, etc.

Active Publication Date: 2019-06-21
武汉钢铁有限公司
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  • Application Information

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Problems solved by technology

It can be seen that the existing KR desulfurization agitator design cannot provide complete agitator structural parameters, nor can it guarantee the reliable and effective stirring, mixing, dispersion and reaction kinetics conditions of the KR stirred reactor, which also leads to the KR stirring of molten iron between different iron and steel enterprises. One of the key factors for the huge difference in the technical and economic indicators of the actual desulfurization production, it is necessary to study a more accurate agitator design method

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Embodiment Construction

[0063] The present invention will be described in further detail below in conjunction with specific embodiments, so that those skilled in the art can understand.

[0064] Such as Figure 1~4 The design method of the molten iron KR desulfurization agitator shown in a steel plant includes the following steps:

[0065] 1) According to the average diameter of the molten iron tank D = 3.853m and the rated maximum molten iron loading W, the calculated depth of the molten iron tank H = 4.255m;

[0066] 2) Empirical setting of the relationship between the structural parameters of the agitator

[0067] a. The experience settings for the new online mixer are as follows:

[0068] (1) The insertion depth Z of the agitator is: Z=(0.45~0.5)×H=1.915~2.128m, so as to ensure that the size of the molten iron mixing area in the molten iron tank is reasonable;

[0069] (2) The effective height b of the blade is: b=(0.625~0.700)×d, where d is the diameter of the impeller of the new agitator to ...

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Abstract

The invention discloses a design method of a molten iron KR desulfurization stirrer, which comprises the following steps: firstly, calculating the molten iron depth of a molten iron tank according tothe average diameter D and the rated maximum molten iron loading capacity of the molten iron tank; calculating to obtain the impeller diameter and the blade effective height b of the new stirrer, andthen calculating the structural parameters of the new stirrer; according to the maximum allowable rotating speed of the stirrer to be offline and the stirring rotating speed of the new stirrer, determining the stirring rotating speed regulation and control range of the stirring device; checking and correcting the maximum loading capacity of the fixed molten iron tank; calculating theoretical stirring power and model selection determination of the new stirrer according to related parameters of the new stirrer; and carrying out empirical correction on the structural size of the new stirrer. According to the invention, through water model tests of stirrers with different blade structures and blade numbers and statistical analysis of industrial application data, an empirical correction methodof the blade number and the blade structures is determined, and optimal stirring, mixing and dispersing effects and KR desulfurization reaction dynamic conditions of stirrers with different structuresare ensured.

Description

technical field [0001] The invention relates to the technical field of molten iron pretreatment, in particular to a method for designing a molten iron KR desulfurization agitator. 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 circulating mixing contact and surface reaction of desulfurizer and high-temperature ...

Claims

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Application Information

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IPC IPC(8): G06F17/50C21C1/02
CPCY02P10/20
Inventor 欧阳德刚李明晖罗安智
Owner 武汉钢铁有限公司
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