Vanadium-titanium blast furnace slag jet granulation by-product fiber cotton waste heat utilization device and method

By using jet granulation and multi-stage heat exchange technology, blast furnace slag is converted into high-quality steam and fiber cotton, solving the environmental pollution and energy waste problems of traditional water quenching methods, and achieving efficient thermal energy utilization and improved economic benefits.

CN122303500APending Publication Date: 2026-06-30SHAANXI YUTENG IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI YUTENG IND
Filing Date
2026-02-28
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Traditional water quenching methods for treating blast furnace slag lead to environmental pollution, energy waste, and low product added value, and cannot effectively utilize the sensible heat of blast furnace slag.

Method used

By coupling jet granulation, waste heat boiler and fluidized bed cooling technologies, molten blast furnace slag is granulated into slag particles and fiber cotton through equipment such as screw air compressor, plunger pump and fluidizing blower. Multi-stage heat exchange is carried out using water-cooled wall and fluidizing blower to generate high-quality steam and fiber cotton.

Benefits of technology

It achieves efficient cascade utilization of thermal energy, generates high-quality steam and fiber cotton, reduces environmental pollution, improves economic benefits and product added value, and achieves the effect of energy conservation and emission reduction.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a device and method for utilizing the waste heat from the jet granulation of vanadium-titanium blast furnace slag, specifically the byproduct fiber cotton. The device includes a slag storage chamber and a granulation chamber. The top of the slag storage chamber is equipped with a blast furnace slag channel for receiving and guiding molten blast furnace slag. A slag storage insulation bag is installed inside the slag storage chamber. A screw air compressor and a plunger pump are installed at the bottom of the slag storage chamber. The slag storage chamber and the granulation chamber are connected by a granulation pipe. A Laval nozzle is connected to the output end of the screw air compressor. The Laval nozzle is configured to spray a supersonic airflow to granulate the molten blast furnace slag flowing into the granulation chamber into slag particles of a predetermined particle size, simultaneously partially forming fiber cotton. A water jet nozzle is connected to the output end of the plunger pump. The water jet nozzle is configured to spray water mist for heat exchange with the slag particles. This invention achieves cascaded utilization of thermal energy, overcoming the limitation of traditional technologies that can only produce low-value cement raw materials, and greatly improving economic efficiency.
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