Slag-forming constituents used for zinc and zinc-base alloy fusion casting

Abstract

The invention relates to a slag-forming constituent in fusing zinc and zinc-base alloy, which is used to slag off zinc or zinc-base alloy and clarify molten metal when zinc-base alloy is used. The slag-forming constituent comprises 55-75wt% of CaF2, 3-8wt% of Na3AlF6, 3-8wt% of KCl, 5-10wt% of NaCl, 5-20wt% of ZnCl2 and 5-15wt% of C powder. The invention improves interfacial force and boundary tension of slag and metal by using chlorine saline to separate slag from liquid metal efficiently, and reduces evaporation of slag under high and low temperature to reduce environmental contamination. The invention has an extensive usage such as zinc ingot casting, zinc-base alloy product casting and zinc-base product later usage.

Description

technical field [0001] The invention relates to a slagging agent for melting and casting of zinc and zinc-based alloys. The product is used for slag removal in melting and casting of zinc and zinc-based alloys and for removing slag and purifying molten metal when zinc-based alloys are used. Background technique [0002] Domestic zinc and zinc-based alloy production ingots and zinc alloys produce large oxidation, and the presence of oxides in the zinc liquid seriously affects the quality of zinc ingots and zinc alloy products, and when the surface oxide slag is salvaged during casting products, it will cause a large amount of oxidation. Valuable metals are wasted, resulting in the disadvantage of low metal recovery rate. The traditional slag removal agent uses NH 4 Cl, ZnCl 2 Or carbonate for slagging treatment, NH 4 Cl, ZnCl 2 The disadvantage of slagging is that there is a lot of smoke and dust and has a pungent smell; the disadvantage of carbonate slagging is that the ...

AI Technical Summary

Problems solved by technology

[0002] Domestic zinc and zinc-based alloy production ingots and zinc alloys produce large oxidation, and the presence of oxides in the zinc liquid seriously affects the quality of zinc ingots and zinc alloy products, and when the surface oxide slag is salvaged during casting products, it will cause a large amount of oxidation. Valuable metals are wasted, resulting in the disadvantage of low metal recovery rate

The traditional slag removal agent uses NH 4 Cl, ZnCl 2 Or carbonate for slagging treatment, NH 4 Cl, ZnCl 2 The disadvantage of slagging is that there is a lot of smoke and dust and has a pungent smell; the disadvantage of carbonate slagging is that the separation effect of slag and metal is poor, which is not conducive to improving the utilization rate of metals

Although the existing slag-making (breaking) agent products can improve the above-mentioned defects to a certain extent, there are environmental protection defects, such as large smoke and dust, and irritating odors, which have a relatively large adverse effect on production operations.

For example, the Patent Office of the State Intellectual Property Office disclosed a patent application (01131646.2) called "Slagging Agent" on July 9, 2003. It uses nitrate KNO 3 with C 6 Cl 6 As an effective component of slagging agent, but nitrate KNO 3 Easy to decompose and produce KNO during slagging 2 , KNO 2 Decomposes into potassium oxide and nitrogen oxide when heated above 350°C, and will explode when heated rapidly to 537°C

Nitrogen oxide is an air pollutant, which has adverse effects on the environment and production operations, and has a certain corrosive effect on equipment; C 6 Cl 6 It is highly toxic and has a pungent smell. Volatilization during slag making will have adverse effects on operational safety and environmental protection, and the slag breaking agent will generate a large amount of smoke and dust when used