Wind-crushing water-cooling granulating method and device for high-temperature liquid-state steel slag, granulating steel slag and use thereof
A liquid steel slag, granulation technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of uncontrolled flow performance of steel slag, low blowing rate of steel slag, influence of steel slag use, etc., to achieve liquid state The effect of improving the fluidity of steel slag, eliminating unstable phases, and increasing reaction speed
Active Publication Date: 2008-09-10
MAANSHAN IRON & STEEL CO LTD
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Problems solved by technology
Due to the low pressure of compressed air and no measures to control the flow properties of steel slag, the blowing rate of steel slag is low, only about 80%, and some large particles in the granulated steel slag also contain unstable phases, which affects the use of steel slag
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[0013] It can be seen from Figure 1 that after the converter (electric furnace) liquid steel slag is poured into the slag receiving tank 2, the slag receiving tank 2 is hoisted and transported to the front of the tundish 1 by the crane 23, and continuously and slowly poured into the tundish 1, and the liquid slag is controlled by the tundish After the flow, it flows out through the nozzle of the tundish, and falls continuously at the mouth of the flow slot. While the liquid slag is falling continuously, the compressed air generated by the air compressor station 11 is transported to the granulator 3 through the compressed air pipeline 6, and a high-speed air flow with a pressure of 0.59-0.70Mpa is ejected from the granulator 3. The granulation process of high-temperature liquid steel slag is realized instantly in the air, and the particle size of steel slag is 0-5mm. At the same time, the granulation of free calcium oxide phase and MgO phase in the liquid steel slag and RO phase...
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Abstract
The invention provides a wind-crushing water-cooling granulating method of high-temperature liquid steel slag, a granulating device and granulated steel slag and use thereof. The invention belongs to the industrial waste comprehensive utilization filed and particularly relates to the treatment and the utilization of high-temperature liquid steel slag. The wind-crushing water-cooling granulating method of high-temperature liquid steel slag comprises the following steps: liquid steel slag flowing out from a tundish is granulated in the air through the high-speed compressed airflow ejected by a granulator; the granulated steel slag is dropped into a water pool so as to be cooled down; moreover, the pressure of the compressed air is controlled between 0.59 MPa and 0.70 MPa, and the degree of superheat of the liquid steel slag is controlled above 110 DEG C. The granulating device comprises a tundish, a granulator and a water pool, and is characterized in that: a tundish rapid heating-up device is arranged near the granulator; and a compressed air pipe is connected with a compressed air pressure automatic display monitoring device. The final blow rate of steel slag is increased from the 80 percent of the prior art to 95 percent and the steel slag has fine particle diameter; moreover, because unstable phase is eliminated, the steel slag can be directly used in the preparation of cement concrete of various strength grade labels from C30 to C80.
Description
technical field [0001] The invention belongs to the field of comprehensive utilization of industrial waste, and in particular relates to the treatment and utilization of high-temperature liquid steel slag. Background technique [0002] Chinese utility model patent "steel slag air crushing and granulating device", patent No. 8821127.6, the disclosed device is composed of a tundish, an atomizer (equivalent to the granulator of the present invention) and a pool, and the bottom of the tundish and the chute have a certain slope The atomizer is connected to the intake pipe, the front nozzle holes are arranged in an H shape, the main nozzle holes are arranged horizontally in the middle of the H shape, and the auxiliary nozzle holes are arranged longitudinally on both sides of the main nozzle hole, and the atomizer can be adjusted through the angle positioning plate Change the spray angle. Due to the low compressed air pressure and no measures to control the flow properties of stee...
Claims
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IPC IPC(8): C04B5/02
CPCC04B18/02Y02W30/91C04B18/141C04B20/0092C04B20/02C04B14/043C04B14/363
Inventor 李文翔陈广言邱艳生王虎
Owner MAANSHAN IRON & STEEL CO LTD
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