Powder spraying device and method for efficient vanadium extracting process of converter

Abstract

The invention discloses a powder spraying device and a powder spraying method for an efficient vanadium extracting process of a converter, belongs to the technical field of metallurgy, and aims to solve the technical problems of poor dynamical condition, low oxidation conversion rate of vanadium and the like in the vanadium extracting process of the converter. The device comprises a powder spraying tank system, a PLC (programmable logic controller) control system, a gas adjusting valve set and a powder spraying gun. The powder spraying rate is accurately and continuously controlled by adjusting the frequency of a rotary feeding tray motor, the powder spraying gun has a double-sleeve structure, carrier gas powder spraying is adopted in a central pipe, meanwhile, auxiliary blowing gas ensures continuous operation of the powder spraying process, and circular seam blowing protective gas protects the powder spraying gun. The powder spraying gun is arranged on the side or the bottom of the vanadium extracting converter, and protective sleeve bricks are embedded around the powder spraying gun. The device is suitable for the vanadium extracting converter of 10 to 200 tons, can spray 50 to 200kg / min iron concentrate powder in the vanadium extracting process of the converter, improve the dynamical and thermodynamic conditions of vanadium extraction of the converter, reduce the content of half steel vanadium to be less than 0.03 percent and improve the content of vanadium slag (V2O5) by 2 to 5 percent, meanwhile, is favorable for shortening the vanadium extracting smelting period of the converter, and realizes efficient vanadium extraction of the converter.

Description

technical field [0001] The present invention relates to a powder spraying metallurgical device and method, specifically, a set of powder spraying system is used to spray vanadium iron fine powder as a coolant into a vanadium extraction converter for efficient vanadium extraction. The powder spraying vanadium extraction device and method belong to field of metallurgical technology. Background technique [0002] At present, vanadium extraction process at home and abroad is mainly based on converter vanadium extraction. Converter vanadium extraction should achieve ideal vanadium oxidation conversion rate, obtain as high as possible residual carbon and superheat of semi-steel, and at the same time effectively control the quality of vanadium slag. The key to the goal of the shortest vanadium blowing cycle is to grasp the temperature control of the converter molten pool during the vanadium extraction process and provide a good stirring capacity of the molten pool, so as to create ...

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Problems solved by technology

However, due to the low temperature of the converter vanadium extraction process, the carbon-oxygen reaction is inhibited, and the content of vanadium in the molten iron is only 0.3% to 0.4%. The blowing time also reduces the recovery rate of vanadium, and the reaction kinetics of the molten pool is poor, resulting in high TFe content in the semi-steel remaining vanadium and slag; at the same time, the vanadium extraction process has very strict requirements on the temperature of the molten pool. Vanadium pig iron blocks, iron ore, and iron oxide balls are used to control the temperature of massive coolants, but the massive coolants cannot continuously control the temperature of the converter vanadium extraction process, which makes the molten pool prone to extreme cold and extreme heat, which is not conducive to vanadium extraction The smooth progress of the reaction

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