Coking reduction smelting device

Abstract

The invention relates to a coking reduction smelting device, which includes steel-making or iron-making equipment, a roasting chamber, a coking reduction chamber, two calcining furnaces and gas treatment equipment. The roasting chamber is connected to the coking reduction chamber through a pellet distributor, and the coking reduction chamber is connected to the steel-making or iron-making equipment through a smelting hopper. The calcining furnaces are positioned on two sides of the coking reduction chamber. Silicon carbide brick partition walls are set between the calcining furnaces and the calcining furnaces. Calcining furnace outlets are in connection with a lime inlet of the steel-making or iron-making equipment, the furnace gas outlet of which is connected to a reducing gas inlet of the coking reduction chamber. A coking gas outlet is connected to the gas treatment equipment, the coal gas outlet of which is divided into two ways, wherein one way is connected to combustion equipment of the roasting chamber, and the other road is connected to calcining equipment of the calcining furnaces. The invention realizes coproduction of molten steel, molten iron, lime and coal tar products, and has the advantages of mutual utilization of energy, effective energy utilization, product treatment and transportation cost reduction, production cost lowering, and economic benefit enhancement.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and chemical production, and relates to a steelmaking or ironmaking coproduction device, in particular to a coking reduction smelting device. Background technique [0002] The iron or steel making process requires the addition of activated lime to the furnace as a solvent or slagging agent. The use of active lime can speed up the slagging speed of smelting, shorten the smelting time, reduce the impurities brought into the ironmaking process, and improve the quality of molten iron. In the process of ironmaking, lime, coke powder and roasted pelletized pig iron are sent into the furnace for smelting. The production of 1 ton of molten iron needs to consume 500 kg of active lime, and the added lime will consume part of the heat of blast furnace steelmaking. At the same time, in the production process of active lime, the limestone material is preheated in the preheating section, calcined into lime...

AI Technical Summary

Problems solved by technology

In the prior art, pellet roasting, lime production, coking, ironmaking and steelmaking are independent production systems. The independent production systems not only increase the transportation cost, but also the by-products and residual heat cannot be used mutually, resulting in a great waste of energy.

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