A Control Method for Preventing Explosion Venting in the Early Stage of Converter Dry Dust Removal

Abstract

The invention relates to a control method for preventing earlier-stage explosion venting of converter dry dedusting, and the earlier-stage control of converting is reinforced. The control method for preventing earlier-stage explosion venting of converter dry dedusting comprises the following steps that (1) a molten iron sample is obtained in a desulphurization station and sent to a test cabinet for a chemical examination as soon as possible, and chemical examination components of the molten iron sample in the test cabinet are sent to a converter second stage; (2) the lance position of an oxygen lance and the blowing oxygen flow are confirmed according to the content of molten iron silicon before converting of the converter second stage is started, and a control corresponding table of the lance position of the oxygen lance and the flow is sent to a converter first stage PLC; and (3) after converting is started, the converter first stage PLC controls the blowing oxygen flow and the oxygen lance lance position according to the converting time schedule. The control method for preventing earlier-stage explosion venting of converter dry dedusting has the advantages that the reasonable converting flow and lance position are confirmed according to a different molten iron silicon quantity, the silicon manganese oxidizing period of converting is stably spent, the phenomenon that the reaction in a furnace is too intense is avoided, and the CO generating speed is slowly increased, so that the explosion venting limitation of CO and O2 in smoke gas is missed. According to the control method for preventing earlier-stage explosion venting of converter dry dedusting, the oxygen flow and lance position in the earlier stage of converting are reasonably controlled, and zero explosion venting of earlier-stage converting dry dedusting is achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a control method for preventing explosion venting in the early stage of converter dry dust removal. Background technique [0002] In the prior art, because the steelmaking process needs to produce converter gas, once the oxygen content is not well controlled, the carbon-oxygen reaction explosion venting will occur. At present, the converter system equipped with dry dust removal has always been dry dust removal control for explosion venting. The key control point of the steel plant, but due to the actual conditions of the molten iron conditions and equipment conditions in the steelmaking process, explosion venting occurs from time to time in the early stage of converter smelting and after the interruption of smelting, and the oxygen-reducing lance is blown again. Usually, the converter oxygen lance position operation and oxygen flow operation are manually modified a...

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Problems solved by technology

[0002] In the prior art, because the steelmaking process needs to produce converter gas, once the oxygen content is not well controlled, the carbon-oxygen reaction explosion venting will occur. At present, the converter system equipped with dry dust removal has always been dry dust removal control for explosion venting. The key control point of the steel plant, but due to the actual conditions of the molten iron conditions and equipment conditions in the steelmaking process, explosion venting occurs from time to time in the early stage of converter smelting and after smelting interruption

Usually, the converter oxygen lance position operation and oxygen flow operation are manually modified and executed on the first-level screen. After this operation, due to the different skills of the employees in different positions, there are relatively large differences in operation, and at the same time, improper judgment and operation are caused by employees. The ratio of converter dry dedusting and explosion removal is relatively large

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