Roller treatment process and treatment device suitable for total-amount steel slag treatment

Patent metadata

Field	Value
Publication number	US-11519043-B2
Application number	US-201716311880-A
Country	US
Kind code	B2
Filing date	Mar 17, 2017
Priority date	Jun 30, 2016
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A roller treatment process and a treatment device suitable for a total-amount steel slag treatment. The treatment process is: firstly, a slag tank ( 2 ) with the molten slag is tightly held by a slag tank tilting mechanism and moved to a slag inlet position, the slag tank ( 2 ) is tilted to pour the molten slag with good fluidity into a rotary roller device ( 5 ) through a feeding chute ( 51 ), so that a roller treatment is achieved; secondly, when the steel slag ( 3 ) without fluidity in the slag tank ( 2 ) cannot flow out, a slag removal machine ( 4 ) is used for pushing the high-viscosity slag or the solid slag into the roller device ( 5 ); and thirdly, the slag tank ( 2 ) is reversed by a large angle tilting to make the slag at the bottom of the tank drop into the roller device ( 5 ), so that the total-amount steel slag treatment of the same roller device ( 5 ) is achieved. The treatment device comprises a feeding system, the roller device ( 5 ), a particle slag conveying and storage system ( 7 ), a tail gas emission and purification system ( 6 ), a cooling water circulation system ( 8 ), a cold steel cleaning mechanism ( 10 ) and an electric control system ( 9 ); and the feeding system comprises the slag tank tilting mechanism ( 1 ), the slag tank ( 2 ), the molten slag ( 3 ) and the slag removal machine ( 4 ).

First claim

What is claimed is:

1. A roller treatment device for total-amount steel slag treatment, comprising a feeding system, a roller unit ( 5 ), a particulate slag conveying and storing system ( 7 ), a tail gas emitting and purifying system ( 6 ), a cooling water circulating system ( 8 ), a cold steel cleaning mechanism ( 10 ) and an electronic control system ( 9 );
wherein the feeding system comprises a slag tank tilting mechanism ( 1 ), a slag tank ( 2 ), and a slag removal machine ( 4 );
wherein the slag tank tilting mechanism ( 1 ) is arranged off-set above a feeding chute ( 51 ) in the roller unit ( 5 ); the slag tank tilting mechanism ( 1 ) comprises a hydraulic mechanism and two tank holding arms, wherein the hydraulic mechanism is configured to drive the slag tank tilting mechanism ( 1 ) to move forward and backward along a horizontal rail, and the hydraulic mechanism is configured to drive the two tank holding arms to lift the slag tank ( 2 ) and control the slag tank ( 2 ) to rotate at an angle of 0-180 degrees;
wherein a steel framework is used for the feeding chute ( 51 ), which comprises a chute frame having a top larger than a bottom; a chute wall surface directly receiving the molten slag ( 3 ) has an angle θ of no less than 35° relative to a horizontal plane; a heat resistant lining plate ( 51 - 1 ) is attached to an inner wall at a side receiving the molten slag; a reinforcing rib ( 51 - 4 ) and a supporting plate ( 51 - 3 ) are arranged at a side opposite the side receiving the molten slag; an end face of the supporting plate ( 51 - 3 ) contacts the chute frame, and another end face thereof contacts a stand positioned on the ground;
wherein a positioning shaft ( 51 - 2 ) is arranged at a bottom of the chute frame, wherein the positioning shaft ( 51 - 2 ) acts to position the feeding chute ( 51 ); a pin shaft ( 51 - 5 ) is arranged at a top of the chute frame, wherein the pin shaft ( 51 - 5 ) is used to hoist the feeding chute; a steel plate ( 51 - 6 ) having a groove shape is arranged at the top of the chute frame for reinforcing and aid in positioning of the feeding chute; and
wherein the slag removal machine ( 4 ) comprises a slag raking head ( 41 ), an extendable rod ( 42 ), a support ( 44 ) and a second hydraulic mechanism ( 45 ), wherein the slag raking head ( 41 ) is fixed to a frond end of the extendable rod ( 42 ); the extendable rod ( 42 ) is arranged on the support ( 44 ), wherein the extendable rod ( 42 ) is configured to extend forward and backward, and rotate up and down, left and right under control of the second hydraulic mechanism to rake the slag from the slag tank into the feeding chute ( 45 ).

2. The roller treatment device for total-amount steel slag treatment according to claim 1 , wherein a thermal shield ( 43 ) is fixed to a front end of the support ( 44 ) for insulating and reflecting back thermal irradiation of the hot molten slag ( 3 ) in the slag tank ( 2 ).

3. The roller treatment device for total-amount steel slag treatment according to claim 1 , wherein the heat resistant lining plate ( 51 - 1 ) has a trapezoid shape having a top larger than a bottom, placed directly on the inner wall at the side receiving the molten slag.

4. The roller treatment device for total-amount steel slag treatment according to claim 1 , wherein the feeding chute ( 51 ) has a feeding throat having a minimum size L of no less than 1500 mm.

5. A roller treatment process for total-amount steel slag treatment with the roller treatment device of claim 1 , wherein:
a slag tank tilting mechanism is used to tightly hold a slag tank containing molten slag and move the slag tank to a feeding position; and the slag tank is tilted to pour molten slag having good fluidity into a rotating roller unit through a feeding chute, thereby realizing the roller treatment; wherein a steel framework is used for the feeding chute, a chute frame having a top larger than a bottom; a chute wall surface directly receiving hot molten slag has an angle θ of no less than 35° relative to a horizontal plane; a heat resistant lining plate is attached to an inner wall at a side receiving the molten slag; a reinforcing rib and a supporting plate are arranged at a side opposite the side receiving the molten slag; an end face of the supporting plate contacts the chute frame, and another end face thereof contacts a stand positioned on the ground; a positioning shaft is arranged at a bottom of the chute frame, wherein the positioning shaft acts to position the feeding chute; a pin shaft is arranged at a top of the chute frame, wherein the pin shaft is used to hoist the feeding chute; a steel plate having a groove shape is arranged at the top of the chute frame for reinforcing the and aid in positioning of the feeding chute;
a slag removal machine is used to rake highly sticky slag or solid slag out to the roller unit when steel slag remaining in the slag tank does not have fluidity and cannot flow out, or when steel slag in the slag tank does not have fluidity and cannot flow out; and
the slag tank is tilted to a larger angle to drop remaining tank bottom slag into the roller unit, thereby achieving the total-amount steel slag treatment in a single roller unit.

6. The roller treatment process for total-amount steel slag treatment according to claim 5 , wherein when the tank is manipulated to drop the tank bottom slag, spray of process cooling water in the roller unit is paused; when the dropping of the tank bottom slag is finished, the spray of the process cooling water is resumed after an extended period of pause time.

7. The roller treatment process for total-amount steel slag treatment according to claim 6 , wherein the extended period of pause time before resuming the spray of the process cooling water is 2 minutes.

Assignees

• Baoshan Iron & Steel

Inventors

• Li Yongqian
• Xiao Yongli
• Liu Yin
• Zhang Youping
• Xie Mengqin

Classifications

• Y02W30/50

  Reuse, recycling or recovery technologies · CPC title

• C21B3/10

  Slag pots; Slag cars · CPC title

• C21B3/06 Primary

  Treatment of liquid slag · CPC title

• C21B2400/022

  Methods of cooling or quenching molten slag · CPC title

• C21B3/08 Primary

  Cooling slag · CPC title