Method and apparatus for purifying zincilate

Abstract

The invention provides a zinc slag purification method and a zinc slag purification device. The zinc slag purification method comprises the following steps: zinc slag is melted through a melting furnace and then is sent into a rectification column for distillation through a feeder, evaporated zinc steam is condensed into a pure zinc liquid through a condenser, and the pure zinc liquid flows into a zinc storage tank and is cast into a zinc ingot of No. 0 zinc through a casting mold; and an unevaporated zinc liquid flows into a liquating furnace, zinc slag ash produced through the treatment of the liquating furnace is discharged from a slag hole, and No. B zinc is transported back to the melting furnace for next cycle. The melting furnace, the rectification column and the liquating furnace are all heated by adopting mixed coal gas of a coke oven and a blast furnace. The method has the advantages of simple equipment structure, reasonable process, and low production cost, reduces energy consumption of furnace ignition by adopting continuous production, avoids the extreme cold and extreme heat of furnace bodies, prolongs the service life of the furnace bodies, and can extract high-quality No. zinc by adopting the distillation of the rectification column.

Description

technical field [0001] The invention belongs to the technical field of zinc slag purification, and in particular relates to a method and a device for purifying zinc slag by adopting a distillation process. Background technique [0002] At present, hot-dip galvanizing slag purifies zinc, adopting vacuum distillation method, such as the Chinese patent No. 91101840.9 titled "Hot-dip galvanizing slag vacuum distillation zinc extraction method and its equipment", this technology is to process the zinc slag Put it into the melting and distillation chamber of the vacuum zinc smelting furnace, close the door of the vacuum zinc smelting furnace, start the vacuum equipment of the vacuum zinc smelting furnace, and make the vacuum degree in the furnace reach 133.3×10~133.3×10 -1 Pa, the heating chamber of the melting and evaporating chamber is heated to 700-1000°C, and the heating time is more than 10 hours. The evaporated zinc is condensed into zinc liquid through the condensation cham...

AI Technical Summary

Problems solved by technology

Find through practice that this vacuum distillation purification zinc slag mainly has the following defects: (1) the chemical composition of the finished product only meets the 1# and 2# zinc standards, does not reach the 0# zinc standard, and the added value of the regenerated product is low; (2) due to This process is intermittent production, the loss of heat energy is large, and the vacuum distillation zinc smelting furnace is severely burned, and the maintenance cycle is short

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