Solvent for anti-vacuum casting of chromium zircomium copper

Abstract

The invention relates to a preparation method of a solvent for anti-vacuum casting of chromium zircomium copper, comprising the following steps: mixing 60-65 weight portions of boric acid, 7-10 weight portions of sodium chloride, 15-25 weight portions of cryolite and 8-10 weight portions of fluorite; carrying out heat fusing to obtain a mixture with the temperature of 850-900 DEG C, and then naturally cooling to room temperature; and crushing to obtain the solvent for anti-vacuum casting of chromium zircomium copper. By covering the solvent on the liquid surface of the casting crystallizer, the liquid surface can be sealed without oxidation by contacting with atmosphere, the activity of the protective layer is good, harmful gas in the copper liquid can be effectively discharged, and oxides in the copper liquid can be kept on the surface of the solvent, so that the brightness and clean of the surface of the ingot casting can be guaranteed, the defects of oxide inclusion and pores are avoided, and the qualified rate of the ingot casting reach more than 97 %. The solvent has the advantages of easy obtainment and convenient purchase of raw materials, simple preparation, and low cost.

Description

technical field [0001] The invention relates to a casting solvent, in particular to a solvent for non-vacuum casting chrome-zirconium-copper alloy. Background technique [0002] During the smelting and casting process of chromium-zirconium copper, the oxidation of chromium and zirconium is very serious, the burning loss is large, the composition is extremely difficult to control, and the amount of slagging is large, resulting in slag inclusion on the surface of the ingot, especially the burning loss of zirconium is more serious. A difficult problem has not been well resolved. Therefore, the traditional melting and casting of chromium-zirconium copper can only be realized in vacuum. The vacuum furnace equipment is expensive, and the process is complicated, the production capacity is low, and the production cost is high. Solvent is a very important link. [0003] In the prior art, when casting chromium-zirconium copper alloys under non-vacuum conditions, charcoal, pyrotechni...

AI Technical Summary

Problems solved by technology

[0002] During the smelting and casting process of chromium-zirconium copper, the oxidation of chromium and zirconium is very serious, the burning loss is large, the composition is extremely difficult to control, and the amount of slagging is large, resulting in slag inclusion on the surface of the ingot, especially the burning loss of zirconium is more serious. A difficult problem has not been well resolved

Therefore, the traditional melting and casting of chromium-zirconium copper can only be realized in vacuum. The vacuum furnace equipment is expensive, and the process is complicated, the production capacity is low, and the production cost is high. Solvent is a very important link

[0003] In the prior art, when casting chromium-zirconium copper alloys under non-vacuum conditions, charcoal, pyrotechnics, etc. are often used to cover the copper liquid to avoid oxidation caused by the contact between the atmosphere and the copper liquid. The burning loss of chromium is about 30%. larger

In addition, charcoal, soot, etc. are used for covering, and the production site is dusty and the environment is very dirty

Moreover, charcoal will consume a large amount of wood resources, the market is in short supply, and the price is relatively high