A waste heat boiler for powder ore suspension magnetization roasting powder rapid cooling and cooling process

Abstract

The invention relates to a waste heat boiler for a quenching and cooling process of a suspended magnetization roasting powder of mine powder. The waste heat boiler mainly comprises a preposed evaporator, a flapper I, a suspended bed evaporator, a cyclone separator, a flapper II, a fluidized bed heat exchanger, a fluidized wind device II, a steam pocket, an oxygen remover, a dosing device and a pollution discharging system. The cooling process of the powder is effectively controlled and a cooling process that the powder is free of loss of excitation is realized through a three-section cooling process: the preposed evaporator, the suspended bed evaporator and the fluidized bed heat exchanger on the suspended magnetization roasting powder of mine powder in a metallurgical process. Waste heat in the powder is effectively utilized, the production energy consumption and the production cost of an enterprise are reduced, and the boiler mainly satisfies the metallurgical beneficiation process requirements, and is energy-saving and consumption-reducing, and has considerable economical value and social benefit.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and energy saving, and in particular relates to a waste heat boiler for a powder ore suspension magnetization roasting powder rapid cooling and cooling process of iron ore in the metallurgical process. Background technique [0002] my country is a country with a serious shortage of iron ore resources, and more than half of the iron ore reserves are refractory iron oxide ores. In order to mine these minerals reasonably, various complex mineral processing processes have been adopted. Among them, fine ore suspension magnetization roasting powder The beneficiation process is the most economical and optimal solution, especially for the beneficiation of refractory iron oxide ore, which can better reflect the characteristics of high iron concentrate grade, low energy consumption, and high resource utilization rate. [0003] In recent years, with the widespread adoption of energy-saving powder dressing ...

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Problems solved by technology

[0007] The traditional cooling method is usually water jacket cooling, the hot water produced by this method is not effectively used, and even produces secondary pollution

There is also a method of mixing high-temperature inert gas containing ultrafine powder with inert gas to recover heat through convective heat exchange. This method converts high-quality waste heat into low-quality waste heat for use, resulting in a greatly reduced energy utilization efficiency. It causes a lot of waste of energy. At the same time, the cost of a large amount of inert gas is also very expensive. In addition, the high-temperature inert gas containing ultrafine powder wears the heat exchange equipment very much, which greatly shortens the life of the heat exchange equipment.

Even if tubes are used to exchange heat between high-temperature inert gas and water or other media, due to low heat exchange efficiency and other reasons, the heat exchange area is large, the process and equipment are relatively complicated, and the investment is large, which is not conducive to industrial promotion.

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