A granulation device and heat recovery method for molten slag

A slag granulation and molten slag technology, applied in recycling technology and other directions, can solve the problems of energy-saving economy, large air volume, large air pressure, low air density and impact force, etc.
CN109207659BActive Publication Date: 2020-02-14TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2020-02-14

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Abstract

The invention relates to a granulating device and heat recovery method for melted slag. The heat recovery method comprises the following procedures: an air-powder flow production procedure: mixing powder with compressed air; a melted slag granulation procedure: jetting the produced air-powder flow to a melted slag flow to convert the melted slag flow into high-temperature granulated slag; and a melted slag powder returning procedure: returning fine-grain powder produced in the melted slag granulation procedure as powder for the air-powder flow production procedure to the air-powder flow production procedure for cyclic usage. According to the invention, high-speed air-powder flow is used as a granulating medium for granulation of the melted slag into high-temperature melted particles; fineslag particles obtained after screening of cooled granulated slag are used as the powder for the air-powder flow for cyclic usage; and waste heat in high-temperature granulation air after granulationof the melted slag is utilized. During granulation and heat recovery of a melting furnace, the energy loss of the granulating medium is low; impact kinetic energy on the melted slag is large; and on the premise of ensuring the granulation effect of the melted slag, the energy consumption of an air source can be reduced and high-grade hot air can be obtained.
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Description

technical field

[0001] The invention relates to a granulation device and a heat recovery method for molten slag, especially relying on the fine powder in the gas powder flow to blow off the molten slag, which can reduce the power attenuation in the process of air jet injection, reduce energy loss, and reduce The granulated air flow rate is used to obtain high-grade hot air, and the vitreous rate of granulated slag is guaranteed to be used in the production of high value-added products. It belongs to the field of molten slag recycling, waste heat recovery and environmental protection. Background technique

[0002] Molten slag refers to the molten metallurgical slag discharged from the smelting furnace during the production process of the metallurgical industry, including blast furnace slag and steel slag produced in the ironmaking furnace, copper slag, lead slag, zinc slag, nickel slag produced in non-ferrous metal smelting slag and other non-ferrous metal slag, red mud disch...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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