Short-process integrated treatment system and treatment method for steel slag

Abstract

A roller body of a steel slag cooling and separating device is a hollow horizontal cylindrical barrel, roller teeth are arranged on the arc-shaped outer side wall of the roller body, and modified fluid heating pipelines are arranged on the arc-shaped inner side wall of the roller body in parallel; and modified fluid cooling pipelines which are arranged in parallel and soaked in ionized water are arranged in the modified fluid medium heat exchange device. By adopting the modified fluid medium, the heat of the steel slag is recycled, and water resources are saved through cyclic utilization. And the hot slag plate conveyor is arranged between the discharge end of the steel slag cooling and separating device and the feed end of the steel slag forced cold pulverization roller. The steel slag forced cold pulverization roller is a variable frequency speed regulation type roller and is internally provided with a rod-shaped crushing medium, the steel slag is further crushed, a steel slag product is directly separated out through a heavy powerful screen and a magnetic separator, and a steel slag magnetic separation production line does not need to be built any more. The whole process is completed through mechanical equipment, the automation level is high, the labor intensity of workers is reduced, and manpower is saved.

Description

technical field [0001] The invention relates to the technical field of powder material mixing equipment, in particular to a short-flow integrated treatment system and treatment method for steel slag. Background technique [0002] Steel slag is a kind of waste produced in the process of converter or electric furnace steelmaking. The output is generally about 10-15% of the crude steel output. In addition to containing dicalcium silicate and tricalcium silicate similar to cement, it also contains Contains about 10% metallic iron resources. Moreover, the temperature of steel slag slag discharge is above about 1400°C, which is rich in huge heat. [0003] At present, the steel slag treatment technology mainly includes hot splashing treatment process, pool hot stuffy process, pressure hot stuffy process, drum method treatment process, air quenching treatment process, granulation wheel treatment process, disk splashing method treatment process, water quenching method treatment proc...

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Problems solved by technology

[0003]At present, the steel slag treatment technologies mainly include hot splashing treatment process, pool hot stuffing process, pressure hot stuffing process, drum method treatment process, air quenching treatment process, granulation Wheel treatment process, plate splashing treatment process, water quenching treatment process, etc., but these processes have some insurmountable shortcomings and drawbacks

For example: (1) The hot-splashing treatment process has a long treatment cycle, a large area, great environmental pollution, poor stability of steel slag, which is not conducive to resource utilization, and the heat is not recycled.

(2) The slag dumping, slag removal and slag discharge links of the pool-type hot stuffy process are open, and dust collection is not possible, and the pollution is serious; the process operation requirements are strict; the equipment and automation are low, the number of labor is large, and the labor intensity is high; heat Not recyclable; risk of explosion

(3) The pressurized heat-stuffing process requires a large investment and occupies a large area. Pressure vessel tanks must be used. The heat is not recycled and there is a risk of explosion. The crane with the tank hanging has a high operating rate.

(4) The drum method has large investment and high operating costs; complex equipment, high failure rate, and difficult maintenance; low steel slag treatment rate (about 50%); heat is not recycled; there is a risk of explosion

(5) The air quenching process can only deal with liquid slag, and the product utilization channels for steel slag are narrow

(6) The treatment rate of the granulation wheel treatment process is low (generally about 50%); only steel slag with good fluidity can be processed; equipment wear is serious; the gelling performance of steel slag is deteriorated and its utilization is affected

(7) The slag pan is easily deformed by the plate splashing method; the process is complicated; the investment and operation costs are high; the stability of the steel slag is poor

(8) The water quenching treatment process has a low treatment rate (up to 50%); improper operation during water quenching is prone to explosion; the utilization of steel slag after treatment is narrow

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