Device for refining high-purity hypereutectic niobium-chromium-containing 8 cast iron and application thereof

Abstract

The refining high-purity hypereutectic niobium-chromium-containing 8 cast iron device comprises a shell, a refractory lining, a wall layer, a base, a gas diffuser, a ventilation block, a gas inlet pipe, a movable joint, a ladle bottom protection contact, a contact protector, a wire and a cover, the shell wraps the refractory lining, the wall layer is arranged on the outer surface of the refractory lining, the base is arranged at the bottom of the shell, and the gas diffuser is arranged on the base. A gas diffuser and a ventilation block are arranged above the base, the ventilation block wraps the gas diffuser, the gas inlet pipe is connected with the gas diffuser, the movable connector is connected with the gas inlet pipe and fixed to the base, and the bottom wrapping protection contact, the contact protector and the wire form a fireproof lining protection device. The bottom wrapping protection contact is embedded in the fireproof lining, the contact protector is connected with the bottom wrapping protection contact through a wire, and the cover is arranged on the top of the device. The device disclosed by the invention can be used for refining to obtain the high-purity hypereutectic niobium-chromium-containing 8 cast iron, and has a relatively good application value.

Description

technical field [0001] The invention belongs to the technical field of equipment for refining cast iron, and in particular relates to a device for refining high-purity hypereutectic niobium-chromium-8 cast iron and its application. Background technique [0002] According to the content of chromium, chromium cast iron is formed, including chromium 8 cast iron, which is one of the most widely used wear-resistant materials at home and abroad. It has been widely used in the production of small (3-inch) pump flow parts, pump bodies, impellers, small (Diameter less than 1.2 meters) Hammer crusher hammer head, lining plate, etc. [0003] At present, most of the domestic production of chromium 8 cast iron smelting equipment and processes adopt the intermediate frequency induction furnace non-oxidative smelting process, but the current intermediate frequency induction furnace has the following shortcomings: First, it is impossible to detect the degree of scouring of the furnace linin...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the smelting equipment and processes of domestic production of chromium 8 cast iron adopt intermediate frequency induction furnace non-oxidation melting process, but the current intermediate frequency induction furnace has the following disadvantages: First, it cannot detect the degree of erosion of the inert gas to the furnace lining during the purification process of cast iron liquid, Choosing a better inert gas pressure and flow rate will result in higher costs; secondly, when the molten cast iron seeps out of the refractory lining and conducts with the shell, it cannot well avoid the occurrence of furnace break-through accidents

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