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Dry slag granulation equipment and method

A technology of dry slag granulation and equipment, which is applied in the field of dry slag granulation equipment and slag granulation, and can solve problems such as large footprint

Inactive Publication Date: 2016-01-20
PRIMETALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to install slag granulation equipment close to the blast furnace foundry, so the molten slag has to be transported a long distance before granulation, and the equipment has a large footprint

Method used

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  • Dry slag granulation equipment and method
  • Dry slag granulation equipment and method
  • Dry slag granulation equipment and method

Examples

Experimental program
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Effect test

Embodiment Construction

[0026] Such as figure 1 It can be seen that the blast furnace 1 is arranged in the foundry 2 . On the left side of the figure, the footprint of a conventional dry slag granulation plant is shown. The slag tank 3a supplies slag from the blast furnace to the center 5 of the rotary atomizer granulator 6 and the granulated slag is distributed around the housing 4 with a 360° spread 7a. The slag trough 3a must extend over at least half the circumference of the granulation plant housing 4 so that the slag falls on the center of the granulator, which usually means that the slag trough 3a extends over a distance of at least 10 metres. Furthermore, the walls of the enclosure must be at a certain distance in all directions from the rotating disk, so the footprint of this conventional granulation enclosure is relatively large.

[0027] The present invention solves the problems of the existing dry slag granulation plant by a slag granulation plant 8 in which a rotary atomizing granulato...

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PUM

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Abstract

A directional slag granulation device comprises a rotary granulator having a central axis of rotation 29, a slag feed stream 11, an actuator 12 for moving the rotary granulator relative to the slag feed stream 11 and means for controlling the actuator. The slag feed stream 11 impinges the granulator at a point 19 offset from its axis of rotation 29, with the actuator 12 being used to move the rotary granulator relative to the slag feed stream 11 in order to obtain a desired location of the impingement point 19. The granulator is a cup, disc or annulus and the actuator 12 is in the form of a hollow guide along which air 14 can be fed to vents 15 in a support 28 on which the granulator is mounted. The device also comprises a deflector plate (26, Fig. 4) on one side of the rotary granulator.

Description

technical field [0001] The invention relates to a dry slag granulation device and a method for granulating slag. Background technique [0002] The slag material may be metal-based, such as iron; may be a metal oxide, such as titanium dioxide; may be non-metallic, such as slag produced as a by-product of the metal manufacturing process; or may be a mixture of the foregoing. [0003] Dry slag granulation is a relatively underdeveloped technique that uses a rotary atomizer, usually a rotating cup or disk, to convert molten slag (obtained, for example, as a by-product of the ironmaking process in a blast furnace) into pellets without adding water to cool and harden the slag. Examples of dry slag granulation apparatus and methods are given in GB2148330, EP0605472 and EP0804620. Molten slag from a blast furnace is supplied to a dry slag granulation plant for granulation, in which process it is supplied either to the center of the cup or disk, or as described in GB840632 to the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B3/08
CPCC21B3/08C21B2400/026C21B2400/052C21B2400/054C21B3/06
Inventor 扬·麦克唐纳
Owner PRIMETALS TECH