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Granulating device for molten steel or iron slag

A technology for liquid steel slag and iron slag, which is applied in the field of granulation devices, can solve the problem of insufficient utilization of heat, and achieve the effects of simple structure, uniform particle size and good application prospect.

Inactive Publication Date: 2013-10-23
WEIFANG QIANGLI SHIPPING PROD CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In actual industrial production, there are still many problems in the granulation and waste heat recovery of steel slag or iron slag, resulting in the large amount of heat carried by steel slag and iron slag not being fully utilized
Lafal nozzle, Venturi tube or other combined nozzle composed of reducer and expander is characterized by simple structure, easy realization and convenient arrangement, and the steel slag or iron slag is granulated by using the high-speed airflow at its throat. The method of melting and cooling has not been involved in the actual production technology

Method used

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  • Granulating device for molten steel or iron slag
  • Granulating device for molten steel or iron slag
  • Granulating device for molten steel or iron slag

Examples

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Embodiment Construction

[0021] Examples such as figure 1 As shown, a granulation device for liquid steel slag or iron slag includes a combined nozzle 1 composed of a reducer and an expander, and a throat perpendicular to the combined nozzle 1 is arranged at the throat of the combined nozzle 1 The outer space of the combined nozzle 1 and the slag pipeline 2 has a cooling airflow.

[0022] When the molten steel slag or iron slag flows out of the pipeline, it is impacted and cooled by the high-speed airflow at the throat to form granulated slag, and the granulated slag sprayed out from the nozzle is mixed with the external cooling airflow for further cooling to make it solidify rapidly.

[0023] In the above embodiment, if figure 2 As shown, the combined nozzle can also be formed by a Venturi tube 3 .

[0024] In the above embodiment, if image 3 As shown, the combined nozzle can also be composed of a Rafal nozzle 4 .

[0025] In the above embodiments, one or more slag pipelines 2 can be arrang...

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Abstract

The invention discloses a granulating device for molten steel or iron slag. The granulating device comprises a combined spray pipe composed of a reducing pipe and an increasing pipe, wherein the throat part of the combined spray pipe is provided with a molten slag pipe vertical to the axis of the throat part of the combined spray pipe, and cooling air flow exists in an outside space of the combined spray pipe and the molten slag pipe. Due to the adoption of the technical scheme, when flowing out of the pipe, molten steel or iron slag is impacted and cooled by high-speed air flow at the throat part to form granulated slag, and the granulated slag sprayed through the spray pipe is mixed with the outside cooling air flow and further cooled so as to be rapidly solidified.

Description

technical field [0001] The invention relates to a granulation device for liquid steel slag or iron slag produced by smelting iron and steel. Background technique [0002] The domestic iron and steel industry produces steel slag or iron-making iron slag treatment processes mainly include: slag hot stuffy pulverization technology, drum method for liquid slag treatment technology, slag aeration technology, HK method slag granulation system, etc. [0003] In actual industrial production, there are still many problems in the granulation and waste heat recovery of steel slag or iron slag, resulting in the large amount of heat carried by steel slag and iron slag not being fully utilized. Lafal nozzle, Venturi tube or other combined nozzle composed of reducer and expander is characterized by simple structure, easy realization and convenient arrangement, and the steel slag or iron slag is granulated by using the high-speed airflow at its throat. The method of melting and cooling has...

Claims

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Application Information

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IPC IPC(8): C21B3/08
Inventor 牟兆强
Owner WEIFANG QIANGLI SHIPPING PROD CO LTD
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