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Stainless steel slag granulating device and method

A stainless steel slag and granulation technology, which is applied in the treatment of molten stainless steel slag and the field of stainless steel slag granulation equipment, can solve the problems of increasing the processing cost per ton of slag, affecting the environment of the work site, and high production and operation costs, so as to alleviate the long cooling period, Significant environmental benefits and economic benefits, the effect of less equipment construction

Active Publication Date: 2018-02-16
SHEN KAN QINHUANGDAO GENERAL ENG DESIGN & RES INST CORP MCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is that stainless steel slag, especially AOD stainless steel slag, has serious pulverization and dust during the cooling process, and the operating environment is harsh, causing huge pollution to the environment
[0004]At present, the cooling methods of stainless steel slag are mainly natural cooling and cooling by adding modified agents. Among them, natural cooling will cause pulverization, serious dust, and serious environmental pollution. Affect the environment on the job site; and the modified formulation cooling method is expensive, which significantly increases the cost of slag treatment per ton, large investment, and high production and operation costs

Method used

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  • Stainless steel slag granulating device and method

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Comparison scheme
Effect test

Embodiment 1

[0083] Such as figure 1 As shown, this embodiment provides a stainless steel slag granulation device, including a slag tank mechanism, a casting mechanism and a quenching mechanism 8 connected in sequence; the slag tank mechanism includes a slag tank 1 with a heating function and a slag tank tipping device 2; The casting mechanism includes an ingot device 3, a dust removal device 4, a cooling device 5 and a steam collection device 6, the dust removal device 4 is arranged above the ingot device 3, the steam collection device 6 is located between the dust removal device 4 and the ingot device 3, and cooling The device 5 is located below the steam collecting device 6; the inlet end and the outlet end of the ingot device 3 are respectively connected with the slag tank mechanism and the quenching mechanism 8.

[0084] Wherein, the slag tank 1 with heating function includes a slag tank and an electric heating device placed in the slag tank. The slag tank tipping device 2 includes a...

Embodiment 2

[0089] The composition of typical stainless steel slag includes: Fe 0.32%, SiO 2 2.88%, CaO 62.79%, MgO4.52%, Al 2 o 3 1.02%, MnO 0.24%, S 0.66% and Cr 2 o 3 0.58%.

[0090] The temperature of stainless steel slag is generally about 1600°C. When slag is discharged, it is loaded into a slag tank with heating function, and transported by a slag tank truck to an environmental protection granulation workshop for granulation treatment of stainless steel slag. The stainless steel slag granulation method includes the following steps:

[0091] (a) Liquid slag heat preservation: use a slag tank with a heating function to control the temperature of the stainless steel slag to 1300°C;

[0092] (b) The casting mechanism starts: start the ingot device and the dust removal device, and wait for casting;

[0093](c) Casting: adjust the tipping angle of the continuous slag tank tipping device, so that the liquid stainless steel slag is evenly poured into the ingot device, and cast into...

Embodiment 3

[0098] A stainless steel slag granulation method, comprising the following steps:

[0099] (a) Liquid slag insulation: use a slag tank with a heating function to control the temperature of the stainless steel slag to 1600°C;

[0100] (b) The casting mechanism starts: start the ingot device and the dust removal device, and wait for casting;

[0101] (c) Casting: adjust the tipping angle of the continuous slag tank tipping device, so that the liquid stainless steel slag is evenly poured into the ingot device, and cast into a block-shaped slag block of 100mm×100mm×40mm;

[0102] (d) Water spray cooling: start the cooling device, spray water to cool the blocky slag, and cool it to 700°C;

[0103] (e) block unloading: unload the cooled blocky slag from the discharge device at the end of the ingot device into the quenching water pool for quenching, and the quenching time is 4h;

[0104] (f) Slag discharge: The slag particles in the quenching water pool are cleared out through the ...

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Abstract

The invention belongs to the technical field of treatment of smelting molten slag, relates to a treatment method of molten stainless steel slag and in particular to a stainless steel slag granulatingdevice and method. The stainless steel slag granulating device provided by the invention comprises a slag tank mechanism, a casting mechanism and a rapid cooling mechanism which are sequentially connected with one another; the slag tank mechanism comprises a slag tank with a heating function and a slag tank tipping device; the casting mechanism comprises an ingotting device, a dust collection device, a cooling device and a steam collection device; the dust collection device is arranged above the ingotting device; the steam collection device is arranged between the dust collection device and the ingotting device; the cooling device is arranged below the steam collection device; and the inlet end and the outlet end of the ingotting device are connected with the slag tank mechanism and the rapid cooling mechanism respectively. The stainless steel slag granulating device provided by the invention can be used for solving the problem of steel slag pulverization caused by natural cooling of the stainless steel slag, so that dust pollution is reduced, the operation environment is obviously improved, and environmental-friendly granulation is realized.

Description

technical field [0001] The invention belongs to the technical field of smelting slag treatment, and relates to a treatment method for molten stainless steel slag, in particular to a stainless steel slag granulation device and method. Background technique [0002] Stainless steel slag is the main waste produced by the smelting of stainless steel in electric furnace (EAF), argon oxygen mixed furnace (AOD) and converter. Stainless steel slag can be divided into EAF stainless steel slag, AOD stainless steel slag and converter stainless steel slag. The shape of EAF stainless steel slag is generally lumpy, granular and powdery. AOD stainless steel slag and converter stainless steel slag are easy to pulverize after cooling and are mainly powdery. According to statistics, the metal content in stainless steel slag is about 10%. It contains nickel, chromium, iron, magnesium, aluminum and other metal elements. If it is not handled properly, it may cause serious environmental pollution...

Claims

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Application Information

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IPC IPC(8): C21B3/06C21B3/08
CPCC21B3/06C21B3/08Y02W30/50
Inventor 王永
Owner SHEN KAN QINHUANGDAO GENERAL ENG DESIGN & RES INST CORP MCC
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