Compound for producing brass rods from scrap copper by horizontal continuous casting and smelting method

Abstract

The invention discloses a compound for producing brass rods from scrap copper by horizontal continuous casting and a smelting method. The compound comprises, by mass, 58-75.7% of wiry and granular scrap copper, 23-38% of irregular scrap copper, 1.0-3.0% of 0# zinc ingots, 0.3-1.0% of additive composition, 10-17% of additive composition grain-containing refiners, 22-28% of decontaminating solvent and 55-68% of heat-insulation covering agents. The smelting method includes: during smelting, feeding the wiry and granular scrap copper, boron alloy and the decontaminating solvent into a furnace for complete heating and melting, feeding the irregular scrap copper, stirring by a stirring rod or a slag extracting ladle, extracting iron slag after stirring is stopped, and feeding rare earth, the zinc ingots and calcium and magnesium powder. The brass rods prepared from the compound by the smelting method are high in overall performance, strong in additive grain refinement performance and good in decontaminating and degassing effects, the grain size of the brass rods is 0.015-0.03mm, the tensile strength of the brass rods is 290MPa, the elongation percentage of the brass rods is larger than 20%, and macroscopic pores and cracks are avoided during polished mirror detection.

Description

technical field [0001] The invention relates to the technical field of nonferrous metallurgy, in particular to a batching and smelting method for producing copper bars by horizontal continuous casting of scrap copper. Background technique [0002] According to the principle of scrap copper metallurgy, in order to obtain a copper rod alloy with excellent performance, it is possible to control the material composition ratio and add an appropriate amount of additives. However, due to the complex composition of brass and too many impurities, all kinds of impurities have their own unique properties, and the performance and action time of different types of additives are not the same, which determines the amount and time of adding raw materials and various additives. Inconsistent. It is a pity that many horizontal continuous casting manufacturers of brass rods do not pay attention to the input sequence of raw materials and additives. Their usual practice is to directly add one or...

AI Technical Summary

Problems solved by technology

However, due to the complex composition of brass and too many impurities, all kinds of impurities have their own unique properties, and the performance and action time of different types of additives are not the same, which determines the amount and time of adding raw materials and various additives. inconsistent

It is a pity that many horizontal continuous casting manufacturers of brass rods do not pay attention to the input sequence of raw materials and additives. Their usual practice is to directly add one or more additives to remove impurities when the brass copper is heated to a certain level. In this way, it is difficult to optimize the performance of additives. Even though some manufacturers have carried out research on the ingredients and smelting methods of copper rods produced by horizontal continuous casting of scrap copper, they have not achieved good results.