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Control method for reducing bonded slag of thermal top cover of vacuum chamber

A control method and vacuum chamber technology, which is applied in the field of control and metallurgical production equipment control, can solve problems such as inability to vacuum, affect vacuum production stability, safety, and product quality, and achieve the goal of reducing sticky slag and reducing a large amount of slag accumulation Effect

Active Publication Date: 2015-11-18
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Especially after the recovery of residual slag, due to the increase of molten steel slag, the slag accumulation on the hot roof of the vacuum chamber is more serious. After continuous production, when the slag accumulation on the hot roof of the vacuum chamber is serious, the vacuum chamber cannot be vacuumed, affecting The stability, safety and product quality of vacuum production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A company’s 1# billet RH vacuum treatment method to reduce sticky slag on the hot roof, including accurate control of the vacuum valve code-named V ZK , release valve code V FS The opening and closing sequence and time are adjusted to reduce the intensity of vacuuming in the early stage of molten steel vacuum treatment, so as to achieve the purpose of reducing the sticky slag on the hot top cover of the vacuum chamber. The specific control steps are: 1) Start vacuum treatment, code-named V FS , the release valve with a diameter of d=65mm is opened; 2) The unit of delay t1 is ms, code-named V ZK , the vacuum valve with a diameter of D=1300mm is opened, where t1=10d / D(s)=500(ms), the time of t1 can be appropriately increased or decreased according to the opening speed of the relief valve; 3) the relief valve (V FS ) delay t2 (ms) to close, where t2 = 30d / D (s) = 1500 (ms), according to the vacuum valve opening speed can be appropriately increased or decreased t2 time; 4...

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PUM

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Abstract

The invention discloses a control method for reducing bonded slag of a thermal top cover of a vacuum chamber and belongs to the technical field of metallurgical production equipment control. The control method can effectively reduce the bonded slag of the thermal top cover of the vacuum chamber in the work process of the thermal top cover of the vacuum chamber and includes the following steps that when the vacuum chamber starts to be vacuumized, a relief valve on the thermal top cover of the vacuum chamber is opened and delayed for 400 ms to 600 ms; then, a vacuum valve on the thermal top cover of the vacuum chamber is opened according to a set curve and meanwhile vacuumization is counted and the stop of the relief valve is counted down; and finally, the vacuum valve is closed when the period of vacuumization is ended and the relief valve is opened again to finish the vacuumizing process of the vacuum chamber.

Description

technical field [0001] The invention relates to a control method, in particular to a control method for reducing sticky slag on a hot top cover of a vacuum chamber, and belongs to the technical field of metallurgical production equipment control. Background technique [0002] RH vacuum treatment is an advanced refining technology outside the furnace for molten steel. It is mainly used for dehydrogenation, decarburization, denitrogenation, deoxidation and desulfurization of molten steel. It also has the functions of alloy fine-tuning and temperature adjustment, which can effectively improve the quality of steel products. During the RH vacuum production process, there are some problems that restrict production, the most important of which is the accumulation of steel slag in the vacuum chamber, including slag accumulation on the outer wall of the oxygen lance, slag accumulation between the hot top cover and the middle tank, and between the middle tank and the bottom tank. Slag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/10
CPCY02P10/20
Inventor 陈祥
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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