Self-preheating type sintering ignition furnace

Abstract

The invention discloses a self-preheating type sintering ignition furnace, and belongs to the field of sintering equipment. The sintering ignition furnace comprises a sintering ignition furnace body, a hot-air conveyer pipe, a gas pipeline and a preheating oven. One end of the hot-air conveyer pipe and one end of the gas pipeline are connected at a burner of the sintering ignition furnace body. The other end of the hot-air conveyer pipe and the other end of the gas pipeline are connected on the preheating furnace. According to the invention, double-pipe heat exchangers are arranged at a holding zone of the ignition furnace, and each double-pipe heat exchanger has a double-layer heat exchange structure, so that the contact area of air or gas and the holding zone is increased, the air or gas can be fully preheated in the heat exchangers, and the heat exchange efficiency is increased; each double-pipe heat exchanger is internally provided with multiple enclosed spaces isolating the hot air and cold air, so that circulation heat exchange efficiency is high; and heat exchange matrixes can be flexibly assembled according to actual demands, and reinforcement pull bars are arranged at connecting portions of the heat exchange matrixes so as to guarantee the connection strength.

Description

technical field [0001] The invention relates to the field of sintering equipment, in particular, the invention relates to a self-preheating sintering ignition furnace. Background technique [0002] Sintering is an important part of the metallurgical industry, especially the iron and steel smelting process, and it is also one of the key operations that affects the energy consumption index of the entire smelting process. Sintering is a processing method to provide "concentrate" for blast furnace smelting. Its essence is to prepare various raw materials (concentrate, mineral powder, fuel, flux, return ore, etc.) according to a certain proportion, mix them with Granulating to obtain the sintered material that meets the requirements. After the sintered material is ignited, it will generate high temperature through the combustion of carbon and the oxidation of iron minerals, so that part of the components in the sintered material will soften and melt, and a certain amount of liqu...

AI Technical Summary

Problems solved by technology

[0003] At present, the fuel used in sintering furnaces is mostly coke oven gas, converter gas and blast furnace gas. Although the cost of blast furnace gas used by enterprises is low, the calorific value of blast furnace gas is low. For sintering requirements, the current general method is to preheat the air or gas to increase the combustion temperature. At present, the preheating furnace is generally used to preheat the air or gas. Although the preheating temperature is high, it needs to consume more energy.

Images