System for extracting iron particles and zinc powder from dust of steel and iron plant

Abstract

The invention relates to a system for extracting iron particles and zinc powder from dust of a steel and iron plant. The system for extracting the iron particles and the zinc powder from the dust of the steel and iron plant is characterized by comprising a mixer, a ball press, a dryer, a swinging belt machine, a rotary hearth furnace, a spiral discharger, a finished product cooler, a mechanical sieve, a waste heat boiler, a heat exchanger, a combustion fan, a dust remover, a draught fan and a chimney; and the output port of the mixer is communicated with the input port of the ball press through conveying equipment, the output port of the ball press is communicated with the input port of the dryer through the conveying equipment, the output port of the dryer is communicated with the input end of the swinging belt machine through the conveying equipment, the swinging belt machine is arranged in a buffer bin of the rotary hearth furnace, the material output port of the rotary hearth furnace is communicated with the finished product cooler through the spiral discharger, and the output port of the finished product cooler is communicated with the input port of the mechanical sieve through the conveying equipment. The system reduces the production energy consumption and the cost, and can realize comprehensive utilization of resources.

Description

technical field [0001] The present invention relates to a system for extracting iron particles and zinc dust from iron and steel plant dust. Background technique [0002] With the increasing awareness of the importance of environmental protection and comprehensive utilization of resources, the national energy-saving and emission-reduction requirements are increasingly urgent, and the research and recycling of iron and steel plant dust (the dust contains iron and zinc) has become a major issue in the metallurgical industry. focus. [0003] The production process of iron and steel plants includes ironmaking, steelmaking, hot rolling, cold rolling and public auxiliary facilities, etc. Every year, each process produces a large amount of blast furnace dust, converter dust, iron oxide scale, waste, etc. If they are not recycled, not only It pollutes the environment, and increases the cost of foreign transportation, which aggravates the production cost of enterprises. If the recy...

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Problems solved by technology

[0005] The reduction temperature in the traditional rotary hearth furnace for iron and steel plant dust cannot be controlled too high, and the metal reduction rate is low. It takes two steps to obtain iron products to meet the needs of subsequent steelmaking production, and the energy consumption of the melting process itself is relatively high, making th

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