Smelting method of electronic scraps

Abstract

The invention discloses a smelting method of electronic scraps. The smelting method of electronic scraps comprises the following steps of 1) mixing the electronic scraps with a slag former and a fuelto obtain a mixed material; and 2) feeding the mixed material in an oxygen-enriched side converting furnace, separately introducing high concentration oxygen and low concentration oxygen in a smeltingarea and a fuming area in the oxygen-enriched side converting furnace, controlling the flue gas outlet temperatures of the smelting area and the fuming area to be 700-1250 DEG C, and performing smelting to produce Cu alloy and furnace slag, wherein the mass ratio of CaO to SiO2 in the furnace slag is larger than or equal to 0.30, the mass ratio of Fe to SiO2 is 0.05-1.0, and the content of Al2O3is smaller than or equal to 17%. The electronic scraps are smelted by adopting the oxygen-enriched side converting furnace of which the smelting area communicates with the fuming area, the high concentration oxygen and the low concentration oxygen are separately introduced in the smelting area and the fuming area, the condition that impurities enter the furnace slag after being sufficiently oxidized is ensured, loss of valuable metals (Cu, Sn and the like), caused after the valuable metals enter the furnace slag after being oxidized, is avoided, the separation efficiency of the impurities andthe alloy and the recovery rate of the valuable metal alloy are effectively improved, the separation difficulty of other impurities and the valuable metal alloy is reduced, and the smelting efficiencyis improved.

Description

technical field [0001] The invention relates to the technical fields of nonferrous metal smelting, hazardous waste treatment and resource recycling, in particular to a method for smelting electronic waste. Background technique [0002] With the continuous development of the electronics and information industry, the total amount of electronic waste is increasing. This type of electronic waste not only contains a large amount of valuable metals (such as copper, tin, iron, aluminum, lead, precious metals, etc.), but also contains a large amount of Plastics, resins, ceramics and other materials have high resource recovery value. [0003] At present, the smelting technology of electronic waste is mainly divided into fire method and wet method. Pyrochemical treatment technology is to use a high-temperature metallurgical furnace to heat the molten material, and through a series of high-temperature chemical reactions, the valuable metal enters the alloy / matte phase in the form of m...

AI Technical Summary

Problems solved by technology

This method uses an oxidizing agent to oxidize the aluminum in the waste and separate it from the valuable metal copper, but it does not give the specific concentration and dosage of the oxidizing agent, and the concentration and dosage of the oxidizing agent will affect the recovery rate of copper during the smelting process. High concentration and dosage will increase the oxidation amount of metal copper, thereby increasing the copper content in the slag and reducing the recovery rate of copper; and the temperature of this smelting method is too high (over 1300°C), which is not conducive to energy saving and consumption reduction, making the smelting equipment Short service life, high operation and maintenance and smelting costs

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