Separation system for reducing and oxidizing heavy metals by electromagnetically roasting metallurgical dust sludge and use method thereof

Abstract

The invention discloses a separation system for reducing and oxidizing heavy metals by electromagnetically roasting metallurgical dust sludge and a use method thereof, and belongs to a metallurgical sludge treatment technology. The separation system comprises a forming device and an electromagnetic heating rotary kiln. Materials are subjected formation before roasting through a forming mechanism in the forming device. Specifically, a first driving motor drives a first forming cylinder to rotate; the first forming cylinder and a second forming cylinder are abutted against each other to form transmission; when the materials pass through the first forming cylinder and the second forming cylinder, the materials are formed through rotating forming grooves on both sides; due to the facts that the materials contain certain moisture, the materials can be adhered to the inside of the forming grooves; and due to the fact that pushing assemblies in cavities push out the materials in the forming grooves and then the materials enter the electromagnetic heating rotary kiln to be subjected to reduction roasting, heavy metal elementary substance of the roasted materials enters the separation device through an exhaust port to be separated out. The forming quality is guaranteed in the process, metal in the formed materials also can be guaranteed to be separated out; the separation efficiency is improved; and residues are roasted to prepare building auxiliary materials.

Description

technical field [0001] The invention relates to the technical field of metallurgical sludge treatment, in particular to a separation system and a use method for reducing and oxidizing heavy metals by electromagnetic roasting metallurgical dust. Background technique [0002] With the rapid development of the metallurgical industry, metallurgical sludge is increasing day by day, which poses a serious threat to the human environment. Metallurgical industrial wastewater contains a large amount of toxic and harmful substances such as Pb, Zn and other heavy metals. Seriously pollute groundwater, soil and farmland, affecting thermal health and ecological environment. The sludge contains a variety of toxic and harmful substances, which must be stabilized and solidified before being harmlessly disposed of in order to achieve the purpose of pollution prevention and control. [0003] In the prior art, metallurgical sludge is solidified for reduction and roasting, but the sludge has no...

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Problems solved by technology

[0003]The existing technology is to solidify the metallurgical sludge for reduction roasting, but the sludge has no regular shape during roasting, and the roasting time cannot be precisely controlled, and it cannot be fully separated Heavy metals will still pollute the environment. When the roasting time is increased to fully roast the sludge to realize the separation, extraction and recovery of heavy metals, it will cause waste of energy and increase in cost.

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