A metallurgical slag granulation heat energy recovery device

Abstract

A metallurgical molten slag pelletization heat energy recycling device comprises a molten slag pelletization solid heat recycling chamber and a gas heat recycling chamber. The molten slag pelletization solid heat recycling chamber comprises a molten slag pelletization cavity and a slag particle heat recycling cavity arranged below the molten slag pelletization cavity. A molten slag tank and molten slag pelletization equipment are arranged at the top of the molten slag pelletization cavity. A slag guide opening is formed in the lowest side of an air distributing plate at the bottom of the molten slag pelletization cavity and communicated with the top of the slag particle heat recycling cavity. A slag particle guide plate with an inclined upper surface is arranged at the top of the slag particle heat recycling cavity, and arranged below the slag guide opening. The inclination direction of the upper surface of the slag particle guide plate is opposite to that of the air distributing plate. Water cooling walls serve as the four walls of the molten slag pelletization solid heat recycling chamber, at least one cyclone separator is arranged on the outer side of the molten slag pelletization solid heat recycling chamber, and the molten slag pelletization solid heat recycling chamber is connected with the gas heat recycling chamber through the cyclone separators and a gas connecting pipe. The metallurgical molten slag pelletization heat energy recycling device has the advantages of being compact in process unit structure, excellent in heat exchange effect, good in process integrality and reliability and the like.

Description

technical field [0001] The invention relates to a metallurgical slag granulation 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 method....

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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 split arrangement is not compact, the process integrity is poor, the equipment occupies a large area, and the heat energy recovery rate is relatively low, especially the process setting including the intermediate transportation and transfer of high-temperature slag particles, which increases the overall instability and safety hazards of the process , but also makes the process operation control more difficult

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