Technology and equipment for disposing blast furnace slag

Abstract

The invention provides a technology and equipment for disposing blast furnace slag, and relates to the disposal field of blast furnace slag produced by iron making in a blast furnace. The technology comprises the specific steps that a slag filling trolley runs to the position above an injection system after molten blast furnace slag flows into the slag filling trolley through a slag trough; the molten blast furnace slag with the temperature of 1350-1450 DEG C flows out and enters a blast furnace slag cooler after the position of the slag filling trolley is checked by a control system and confirmed that there is nothing wrong; the molten blast furnace slag is broken under the impact of high pressure gas of the injection system, and cooled and collected; and cold blast furnace slag particles are collected and conveyed by a conveying system after high-temperature blast furnace slag particles cooled enter a heat recovery boiler for cooling. According to the technology and equipment for disposing blast furnace slag, provided by the invention, not only waste heat of the blast furnace slag can be recycled, but also new water is not consumed; no harmful gas is discharged to atmosphere, and pollutant discharge is reduced; and the working environment is improved.

Description

technical field [0001] The invention relates to the field of blast furnace slag treatment produced by blast furnace ironmaking, in particular to a process and equipment for processing blast furnace slag. Background technique [0002] As we all know, blast furnace slag is one of the main by-products produced in the process of blast furnace ironmaking. For every ton of pig iron produced, 0.3-0.6 tons of blast furnace slag is produced by-product. Its own temperature is relatively high, reaching about 1350°C-1450°C, and it contains a lot of heat. . Each ton of blast furnace slag contains about (1.26~1.88)×10 6 The sensible heat of kJ is equivalent to 45-60kg standard coal. The waste heat of blast furnace slag has the characteristics of high grade and large quantity. At present, blast furnace slag is treated by water flushing slag process (Inba method, bottom filtration method, Lhasa method, Tula method and HK method) at home and abroad. The waste heat recovery rate of this me...

AI Technical Summary

Problems solved by technology

[0003] (1) The high-quality waste heat resources contained in the blast furnace slag are wasted. The liquid blast furnace slag at 1350°C-1450°C is discharged from the slag outlet, and is granulated and cooled by high-pressure water

At such a high temperature, most of the liquid water is quickly vaporized into water vapor and released into the atmosphere, wasting a lot of heat;

[0004] (2) A large amount of water resources are wasted. During the process of washing slag with water, the water pressure is greater than 0.2MPa, and the ratio of slag to water is 1:1. Each ton of slag needs to consume 0.8 to 1.2 tons of new water

[0005] (3) Water-cooled blast furnace slag will produce SO 2 and H 2 S and other harmful gases, polluting the environment

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