Shaft furnace with grate

Abstract

The invention relates to a shaft furnace with a grate, which consists of a gas collecting chamber, a preheating chamber and a combustion chamber, wherein the gas collecting chamber is fixedly arranged on the upper part of the preheating chamber, the combustion chamber is fixedly arranged on the lower part of the preheating chamber, the upper part of the gas collecting chamber is provided with an exhaust port, the side wall of the gas collecting chamber is provided with a feed inlet, the inner wall of the preheating chamber is fixedly provided with an insulating layer, the side wall of the combustion chamber is fixedly provided with a combustion nozzle, the side wall of the combustion chamber below the combustion nozzle is provided with a slag hole and a molten iron outlet, and the lower part of the preheating chamber is horizontally and fixedly provided with the grate which has a hollow pipe structure. The shaft furnace has the advantages of simple overall structure, scientific and reasonable design, small overall device volume, good heat preservation performance, high clinkering efficiency, energy conservation, environmental protection and low clinkering cost, and is the high innovative shaft furnace with the grate.

Description

technical field [0001] The invention belongs to a shaft furnace in the technical field of metallurgical equipment, in particular to a shaft furnace with a grate. Background technique [0002] China is the first country in the world to use shaft furnaces to smelt iron. In ancient my country, shaft furnaces were mainly used to smelt pig iron. The iron-making shaft furnace was developed from the copper-smelting shaft furnace. Shaft furnace ironmaking is an economical and effective method of ironmaking. The upper side of the shaft furnace is charged, and the lower part is blasted, thereby forming a relative movement between the furnace material falling and the gas rising. The high-temperature gas generated by combustion rises through the material layer, and the heat Passed to the furnace charge, the carbon monoxide contained in the high-temperature gas also reduces the iron oxide. In this way, the thermal energy and chemical energy of combustion can be fully utilized at the sam...

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Problems solved by technology

Although the current shaft furnace can achieve the purpose of smelting primary ore, there are still the following problems in smelting scrap iron slag and primary ore: (1). The shaft furnace and supporting heat exchange equipment are huge in size and occupy a lot of space; (2). The furnace body in the preheating stage has poor thermal insulation performance, and the heat is lost quickly, resulting in waste of heat energy; (3). The heating rate of the combustion chamber is slow, and the slag efficiency is low; (4). When the smelting scrap iron slag is fed, it is easy to extinguish the fire Cause re-ignition and reduce smelting efficiency; (5). High cost of raw materials

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