Method and device for producing zinc alloy used for hot dipping by using zinc slag

Abstract

The invention discloses a method and a device for producing a zinc alloy used for hot dipping by using zinc slag. The method comprises the following steps of 1) adding materials for a first time and removing slag for the first time; 2) keeping warm and removing residues; 3) rectifying and heat-exchanging; 4) condensing; 5) re-adding the materials for circulation; 6) preparing the alloy: adding aluminium element in condensed No. 0 zinc liquid according to requirements, and mixing uniformly to cast a alloy ingot. The invention also provides a device for producing the zinc alloy used for hot dipping by using the zinc slag. The method is reasonable in process arrangement and low in production cost, greatly reduces in energy consumption, reduces potential risks, can control the whole production process, and realizes cyclic utilization of resources.

Description

technical field [0001] The invention relates to the technical field of zinc slag purification, in particular to a method and equipment for producing zinc alloys for hot-dip galvanizing by utilizing zinc slag. Background technique [0002] At present, there are two main methods for purifying zinc from hot dip galvanized slag: [0003] One is the vacuum rectification method. For example, the patent number "911018409" is a Chinese patent titled "Method for Extracting Zinc by Vacuum Distillation of Hot-Dip Galvanized Slag and Its Equipment". The invention is realized in a horizontal and cylindrical vacuum furnace, In the furnace, the evaporation zone and the condensation zone are divided into solid feed and slag, and liquid out of metal. Intermittent operation, the heating element is three groups of graphite electrodes connected in a star-shaped plate and heated in the upper part of the evaporation area. Control furnace temperature 700~1000℃, vacuum degree 133.3×10 to 133.3×10...

AI Technical Summary

Problems solved by technology

It has been found through practice that the main defects of the zinc slag purified by vacuum distillation are: the physical components of the finished product cannot reach the 0# zinc standard, and the added value of the recycled product is low;

This method can produce 0# zinc, but this patented method and device are only suitable for hot-dip galvanizing slag with a zinc content of more than 99%, and the purification rate can reach more than 80%, and the output rate is low; the second is the energy in the device The medium is the mixed gas of coke oven and blast furnace, which has the potential safety hazard of CO poisoning; the third is to add materials to the melting furnace, which will repeatedly cause energy consumption. In terms of technology, this device can be used to melt zinc slag. After the waste heat is completed, the zinc slag can be melted and melted, which can not only reduce energy consumption, but also speed up the melting speed, improve the melting effect, and reduce the amount of oxidized slag.

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