Metallurgical molten slag granulation and heat energy recovery device

Abstract

The invention relates to a metallurgical molten slag granulation and heat energy recovery device belonging to the technical fields of metallurgical molten slag treatment and waste heat recovery and utilization. The device contains a device body, a granulation apparatus, a cyclone separator and a molten slag funnel, wherein the molten slag funnel is arranged at the upper part of the device body; the granulation apparatus is closely arranged under the molten slag funnel; the cyclone separator is arranged on the side wall of the device body; and the lower part of the body is provided with a buried heat exchange pipe, a deslagging port, an air distribution plate, an air chamber and an air inlet. By using the device provided by the invention, various kinds of metallurgical molten slag can be effectively granulated, and heat energy of the molten slag can be recovered at high quality to produce hot water, hot air or steam, thus effectively solving various problems in the aspects of metallurgical molten slag granulation, heat energy recovery and the like.

Description

technical field [0001] The invention relates to a metallurgical slag granulation and heat energy recovery device, which belongs to the technical field of metallurgical slag treatment and waste heat recovery and utilization. Background technique [0002] Slag is a high-temperature, molten product in the metallurgical production process, such as liquid blast furnace slag, steel slag, copper slag, etc., which contains rich heat energy resources. [0003] For example, liquid blast furnace slag is a typical molten slag. The quenched blast furnace slag forms a large amount of glass phase amorphous substance, which has high hydration activity and is a high-quality raw material for the production of cement and other building materials. At the same time, the temperature of liquid blast furnace slag is between 1300°C and 1600°C, which has a high value of heat energy recovery and utilization. [0004] At present, the liquid blast furnace slag is mainly processed by water quenching met...

AI Technical Summary

Problems solved by technology

[0004] At present, the liquid blast furnace slag is mainly processed by water quenching method. The blast furnace slag after water quenching can be used to make building materials such as cement. The main problems of the water quenching method are: large water consumption; generation of H 2 S and SO x Air pollution is caused; heat energy is not recovered; water quenching slag has a high moisture content, and the grinding needs to be dried; fine particles contained in circulating water cause serious wear and blockage of pumps and valves and other components, and the system maintenance workload is large, which increases maintenance. cost

The wind quenching method uses a high-power granulation fan to generate high-speed airflow to blow away liquid blast furnace slag. Its main disadvantages are large power consumption, large and complex equipment, large floor area, high investment and operating costs, and when the flow rate of liquid blast furnace slag changes, Wind speed and air volume are not easy to coordinate, and a large amount of cold air enters the system, which also reduces the quality of heat recovery

The centrifugal method relies on the centrifugal force generated by the high-speed rotation of the turntable or cup to granulate the liquid blast furnace slag. Although high-energy-consuming equipment such as a granulation fan is not required, the high-speed rotating turntable or cup directly contacts with the high-temperature slag, thus reducing In addition, the granulation effect is more sensitive to the temperature and flow changes of liquid blast furnace slag, the effect of adjusting the speed alone is not ideal, and the slag flying around at a high speed is not conducive to the compact design of the equipment, high temperature The concentrated slag hits a certain part inside the equipment at high speed, and it is easy to cause local overheating of the equipment and damage the equipment

Images