Melting furnace and method for treating materials to be melted using the melting furnace

Abstract

The invention discloses a melting furnace and a method for treating materials to be melted by using the melting furnace. The melting furnace comprises: a melting furnace body with a melting space inside, a melting pool defined at the bottom of the melting space, and a melting space Along the melt flow direction, a feeding zone, a melting zone, a separation zone and a discharging zone are sequentially formed, the side wall of the feeding zone is provided with a feed port, and the side wall of the discharging zone is provided with a discharge port and a slag discharge port; For the first regenerative burner, at least one pair of first regenerative burners are correspondingly arranged in the melting zone, and each pair of first regenerative burners is arranged on the opposite side walls of the melting furnace body, and each first regenerative burner The first type burner includes a nozzle, a gas sediment chamber, an air sediment chamber, a gas regenerator, and an air regenerator; for the second regenerative burner, at least one pair of second regenerative burners is set in the separation area, and each pair of the second regenerative burner Two regenerative burners are arranged on opposite side walls of the melting furnace body. The melting furnace can realize the continuous processing of the material to be melted, and the heat storage body in the heat storage chamber is not easy to be blocked.

Description

technical field [0001] The invention relates to a melting furnace and a method for treating materials to be melted by using the melting furnace. Background technique [0002] At present, the blast furnace is usually used to separate slag and iron. The blast furnace is a type of vertical furnace, which requires coke as a material rack to keep the gas passage in the furnace unobstructed. The heat energy generated by the combustion of coke melts the reduced iron generated in the upper reduction zone into a liquid. It drips into the hearth, and the slag and molten metal are separated in the hearth. After accumulating to a certain amount, it is discharged from the slag tap to obtain molten metal and slag. However, this technology needs to use coke as fuel and material column, and the coking process will cause serious environmental pollution, and has high requirements on the strength of the material entering the furnace. For example, the strength of the pellets is low, which will ...

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Problems solved by technology

However, this technology needs to use coke as fuel and material column, and the coking process will cause serious environmental pollution, and has high requirements on the strength of the material entering the furnace. For example, the strength of the pellets is low, which will cause the material column to breathe during the falling process. The deterioration of the performance will affect the forward movement of the blast furnace and the full utilization of the chemical energy of the gas. At the same time, the controllability of the equipment is poor, and it belongs to the closed smelting. From the raw material entering the furnace to the molten metal flowing out, the reaction time is long and cannot be processed continuously. Secondly, the raw material adapts It is only suitable for the smelting of high-grade iron ore concentrates, and cannot be used for refractory ore, vanadium-titanium ore, compound ore, etc. with the largest reserves. In addition, the equipment has high energy consumption and low energy utilization efficiency. High, energy conversion needs to be carried out in the form of waste heat boiler and power generation, and the conversion efficiency is ≤30%

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