Jet steam slag granulation and heat utilization method

Abstract

The invention provides a new metallurgical slag granulation and heat utilization method and an apparatus thereof. A jet device which is commonly used in the market is used in a metallurgical slag treatment process, the principles of the jet device and a steam explosion tank are combined with the principle of a steam process slag treatment process, the jet process of the jet device is used to carryout metallurgical slag granulation, high-pressure jetted water is used to realize the sealing of the mouth of the jet device in order to form a semi-closed space composed of a mixing chamber and a primary heat exchange chamber, steam explosion process energy in a semi-closed container is used to carry out slag granulation and heat exchange, the slag is cooled mainly relying on the vaporization ofwater and the overheating process of steam, and superheated steam output is directly generated to carry out heat utilization. The new jet steam process slag granulation and heat utilization method utilizes water quenching and high-pressure water kinetic energy to crush the slag and utilizes the steam explosion process energy to granulate the slag, and the steam explosion energy formed in the closed space is used to achieve high-pressure rapid heat exchange. The one apparatus can realize the heat exchange process while achieving slag granulation, and the generated slag and steam output undergoheat exchange in a boiler to form clean steam or high-temperature hot water which can be used. The method is carried out in the closed container, the steam explosion energy is utilized, and the slagis cooled by using the steam process water vaporization and steam overheating process, so the method has the advantages of water saving, energy saving, environmental protection and high heat utilization efficiency, and the apparatus meets the heat exchange process while realizing slag treatment, and has practical application values.

Description

technical field [0001] The invention belongs to metallurgical slag granulation and slag treatment process, in particular to a metallurgical liquid slag granulation method and a waste heat utilization process and device. Background technique [0002] A large amount of metallurgical slag is produced in my country every year. The existing or tested slag treatment methods mainly include water quenching method, air quenching method, mechanical granulation plus air or water granulation method. Water quenching methods mainly include Lhasa method (RASA), INBA method, wheel method, Minte method, sedimentation tank, slag method, hot splash method, hot braising method, etc. These methods all use water quenching and water cooling. The process adopts water spraying or water injection to granulate and cool the slag, and all the heat of the slag enters the water. Due to the low enthalpy of water, the water consumption is relatively large. Generally, the ratio of slag to water is about 1:6-...

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Problems solved by technology

[0029] The present invention aims at the inadequacies of the existing metallurgical slag granulation process that cannot realize heat utilization, and the existing patent slag granulation process relies on additional power equipment for granulation, high energy consumption, complex equipment and other technological deficiencies, and proposes a new method Slag granulation method and device

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