Energy-saving environment-protecting method for steel and iron plant sintering

Abstract

The invention discloses an energy-saving environment-protecting method for steel and iron plant sintering. The energy-saving environment-protecting method for steel and iron plant sintering comprises the following steps that (1) solid fuel consumption is reduced by adopting thick bed sintering; (2) solid fuel consumption is reduced through recycling production and the burning effect and performance of solid fuels improvement; (3) the burning effect and performance of solid fuels are improved; (4) the temperature of a sintering material can be improved through hot returning ores and quick lime and hot gas sintering and by injecting steam through a drum mixer before the fuels are mixed, and thus waste heat can be utilized; (5) energy consumption of ignition is reduced by applying an energy-saving type igniter and by means of the method of preheating combustion air; (6) electricity consumption is reduced by reducing air leakage and by adopting a frequency conversion technology; and (7) waste heat is recycled by applying a waste heat boiler and by adopting a waste heat boiler and a waste gas sintering technology. Energy saving and environment protection of the sintering process is actually achieved through the energy-saving environment-protecting method for steel and iron plant sintering provided by the invention.

Description

technical field [0001] The invention relates to an energy-saving and environment-friendly method for sintering in a steel plant, belonging to the technical field of environment protection and energy conservation. Background technique [0002] The sintering of the iron and steel plant is an important step in the processing of raw materials into steel. It uses a sintering machine to add various ores to a certain amount of flux and fuel according to the needs of the blast furnace, and ignites the fuel to burn. Under the action of draft and the heat provided by the fuel, each The ore is bonded in the liquid phase to form a sinter with a certain particle size for use in the blast furnace. Generally speaking, the sintering process of a steel plant mainly includes pre-mixing of raw materials before sintering, batching, mixing and adding water, distribution, ignition, sintering, cooling, granulation and other links. Most of the iron and steel plants in my country use sinter as the ...

AI Technical Summary

Problems solved by technology

The existing sintering method is relatively simple and easy to implement, but it has inevitable shortcomings. The energy consumption of sintering is too large, and the negative impact on the environment is also relatively large. In this era of energy shortage, there are many traditional sintering methods. Contrary to the requirements of contemporary energy conservation and environmental protection, and the consumption of energy and materials has a great impact on enterprises; therefore, it is urgent to invent a new type of sintering method, so that the sintering process can truly achieve energy conservation and environmental protection