Efficient Treatment Method and Apparatus for Multiphase Steel Slag

Patent metadata

Field	Value
Publication number	US-2023265533-A1
Application number	US-202117922663-A
Country	US
Kind code	A1
Filing date	Mar 29, 2021
Priority date	May 6, 2020
Publication date	Aug 24, 2023
Grant date	—

Abstract

The present application provides an efficient treatment method and apparatus for multiphase steel slag. According to the present application, the treatment apparatus for multiphase steel slag comprises a steel slag feeding apparatus and a drum for treating steel slag, and the steel slag feeding apparatus comprises a feeding chute; the treatment apparatus for multiphase steel slag further comprises a storage compartment disposed between the feeding chute and the drum; the storage compartment is an open cylinder, and has one end forming a working fit with the lower open end of the feeding chute and the other end being fixedly connected to and coaxial with the treatment cavity of the drum. By means of the storage compartment obliquely placed between the front of the drum and the feeding chute and used for buffering and transition, there is no need to use a slag raking apparatus, and safe technological treatment of various steel slag by a drum is implemented.

First claim

1 . A high efficiency processing method for multiphase steel slag, where the steel slag is multiphase high temperature steel slag, comprising steel slag with high fluidity and highly viscous slag with poor fluidity or solid steel slag, wherein the method comprises the following steps:
a slag tank with multiphase high temperature steel slag is held tightly by a tilting mechanism and moved to a slag feeding position, the slag tank is tilted so that the high temperature steel slag with high fluidity in the slag tank is poured through a feeding chute controllably at a set tilting speed, and into a storage bin that is placed at an inclined angle between a front part of a rotary drum and the feeding chute and rotates continuously with the rotary drum, the high temperature steel slag is separated from an inner wall of the storage bin with the rotation of the storage bin due to gravity, and slides controllably along a direction of inclination of the storage bin and moves into the rotary drum which is rotating, and is processed by a rotary drum processing; when the highly viscous slag or the solid slag remained in the slag tank cannot flow out because of its low fluidity, the slag tank is tilted continuously so that all the steel slag in the tank are poured into the feeding chute provided at the inclined angle, the highly viscous slag or solid slag slides into the feeding chute and the storage bin which is rotating through a funnel of the feeding chute due to gravity, and then slides slowly into the rotary drum with the rotation of the rotary drum and the storage bin due to gravity and the angle of inclination of the storage bin, and is processed by a rotary drum processing, where a speed of the highly viscous slag or solid slag sliding into the rotary drum is determined by the rotary drum.

2 . The high efficiency processing method for multiphase steel slag according to claim 1 , wherein the method further comprises restoring the tilting mechanism after turning the tank is completed, and continuing with a next slag tank, where the rotary drum is not stopped and at a continuous operating state during this process.

3 . The high efficiency processing method for multiphase steel slag according to claim 1 , wherein the method further comprises cleaning the steel slag mechanically by a mechanical arm of a slag cleaning machine provided above the chute when the steel slag is accumulated or sticked on the feeding chute, keeping the feeding chute clear.

4 . The high efficiency processing method for multiphase steel slag according to claim 1 , wherein the method further comprises stopping the machine for a short time when many large pieces of cold steel are accumulated in the rotary drum, removing the feeding chute with the feeding funnel, turning on the slag cleaning machine and removing the large pieces of cold steel rapidly from the rotary drum through the storage bin by operating the mechanical arm of the slag cleaning machine and an electromagnet at its end.

5 . The high efficiency processing method for multiphase steel slag according to claim 1 , wherein the high temperature steel slag with high fluidity is cooled rapidly and solidified at the inner wall of the storage bin.

6 . The high efficiency processing method for multiphase steel slag according to claim 1 , wherein a volume of the storage bin is 2-3 times a volume of the slag tank for accommodating all the slag in the slag tank, preventing the high temperature steel slag from accumulating on a processing chamber and steel balls of the rotary drum which may cause explosion, and the steel slag in the storage bin would flow into the rotary drum slowly with the rotation of the rotary drum, contacting with the steel balls slowly and being taken away by the steel balls and then cooled and crushed.

7 . A processing plant for multiphase steel slag, comprising a steel slag feeding equipment and a rotary drum for processing steel slag, wherein the steel slag feeding equipment comprises a feeding chute;
the processing plant for multiphase steel slag further comprises a storage bin is provided between the feeding chute and the rotary drum, the storage bin is with a shape of barrel, with one end forming a rotatable fit with a lower opening end of the chute with a funnel, the other end being connected with a processing chamber of the rotary drum and coaxial with the rotary drum.

8 . The processing plant for multiphase steel slag according to claim 7 , wherein the lower opening end of the chute forms a clearance fit with an opening end of the storage bin.

9 . The processing plant for multiphase steel slag according to claim 7 , wherein an axis of the rotary drum has an angle of inclination relative to a horizontal plane, where the angle of inclination ranges from 0° to 25°.

10 . The processing plant for multiphase steel slag according to claim 7 , wherein an axis of the rotary drum has an angle of inclination relative to a horizontal plane, where the angle of inclination ranges from 8° to 12°.

11 . The processing plant for multiphase steel slag according to claim 7 , wherein the inner wall of the storage bin is water cooling wall.

12 . The processing plant for multiphase steel slag according to claim 7 , wherein annular cooling spray tubes are provided, the spray tubes are provided evenly along an axis of the storage bin, an outer cover is provided outside the cooling tubes, the outer cover is fixed with the ground and discharges spraying water collected from the cooling tubes, the cooling tubes are fixed on the cover.

13 . The processing plant for multiphase steel slag according to claim 7 , wherein a lower portion of the feeding chute withstanding the flow of hot slag is provided with a water cooling equipment.

14 . The processing plant for multiphase steel slag according to claim 7 , wherein a volume of the storage bin is 2-3 times a volume of the slag tank.

15 . The processing plant for multiphase steel slag according to claim 7 , wherein a slag discharging area of an outer cylinder of a rotary drum is provided with water collecting rooms with a type of waterwheel to ensure no accumulation of water during processing, and the rooms are provided evenly along the circumference of the outer cylinder, the angle of a partition plate between the rooms matches with an opening angle of the funnel for receiving slag.

16 . The processing plant for multiphase steel slag according to claim 7 , wherein the lower opening end of the feeding chute is inserted into the end of the storage bin.

Assignees

• Baoshan Iron & Steel

Inventors

• Xiao Yongli
• Li Yongqian

Classifications

• C21B3/08 Primary

  Cooling slag · CPC title

• C21B2400/024

  with the direct use of steam or liquid coolants, e.g. water · CPC title

• C21B2400/056

  Drums whereby slag is poured on or in between · CPC title

• C21B2400/066

  Receptacle features where the slag is treated · CPC title

• C21B3/06 Primary

  Treatment of liquid slag · CPC title