Device and method for synergistic quenching and tempering treatment of steel slag and nonferrous metal smelting slag

Abstract

The invention discloses a device and a method for synergistic quenching and tempering treatment of steel slag and nonferrous metal smelting slag, and belongs to the technical field of iron and steel metallurgy. The problems that in the prior art, metal resources in the nonferrous metal smelting slag are difficult to recover, slag stacking and stacking environment pollution are serious, high-temperature sensible heat of the steel slag is not fully utilized in a prior steel slag treatment method, and iron oxide in the steel slag is low in recovery rate are solved. The device for synergistic quenching and tempering treatment comprises a quenching and tempering furnace and a driving mechanism, wherein the quenching and tempering furnace comprises a quenching and tempering furnace molten pool,the upper part of the quenching and tempering furnace is provided with a steel slag inlet and a nonferrous metal smelting slag inlet, and the quenching and tempering furnace is also provided with a coal oxygen lance; the driving mechanism is arranged at the bottom of the quenching and tempering furnace and used for driving the quenching and tempering furnace to swing and rotate; and the device further comprises a drying pretreatment unit. The device can carry out synergistic quenching and tempering treatment on steel slag and nonferrous metal smelting slag to realize steel slag modification and iron resource recovery; and the quenched and tempered slag can be used as a cement raw material or an artificial sand stone material for buildings after being treated.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a device and method for coordinated quenching and tempering treatment of steel slag and nonferrous metal smelting slag. Background technique [0002] Steel slag is solid waste discharged during the steelmaking process. Its main sources are slagging materials added during the smelting process, eroded furnace lining refractory materials during the smelting process, and sediment brought in by solid materials. At present, the discharge of domestic steel slag is 8% to 15% of steel production, about 140 million tons per year, accounting for about 24% of the total industrial solid waste. At present, steel slag is mainly used in the cushion, structural layer, and Asphalt mixture, slag fertilizer, pit filling, steel slag cement and cementitious materials, etc. [0003] Steel slag is also a high-quality waste heat resource. The temperature of liquid steel slag is 1450-16...

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Problems solved by technology

At present, the utilization rate of copper in copper slag does not exceed 12%, while the utilization rate of iron is less than 1%. Therefore, the development of new technologies to comprehensively utilize copper slag resources and extract valuable metals such as iron can promote the sustainable development of the metallurgical industry. Conducive to the rational use of secondary resources, with dual meanings of economy and environmental protection

This practice not only occupies a large amount of land, but also costs site construction and maintenance costs, and many available components in red mud cannot be used reasonably, resulting in secondary waste of resources and posing a great threat to the environment.

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