Suspending magnetization roasting furnace

Abstract

The invention provides a suspension magnetizing roasting furnace, which consists of a furnace body and a cyclone separator, wherein an upper part discharge port of the furnace body is fixedly connected with a feeding port of the cyclone separator; a top cover of the cyclone separator is fixedly provided with an exhaust pipe, the lower end of a conical platform body of the cyclone separator is fixedly connected with a material discharge pipe, the lower end of the furnace body is vertically provided with a conical platform body and a vertical guide pipe which are fixedly connected with each other into a whole; and the furnace wall of the lower part of the cylindrical furnace body is provided with the feeding port, a heat supply port of an auxiliary combustor and a heat supply port of a heat supply roaster respectively. The furnace has the advantages: 1. the furnace is widely applied to the magnetized roasting of various refractory minerals such as iron-bearing mineral, siderite, complex multi-phase iron ore and the like and wastes such as ore tailings, slag, red mud and the like; 2. powdery materials are suspended in air flow for quick heat transfer and deep reducing reaction, and the magnetic susceptibility of the obtained roasted product is high, and better than that of the prior equipment; and 3. the equipment is easy for mass production, and the throughput of one furnace can reach 2 million tons per year, which is few times higher than that of other known equipment.

Description

technical field [0001] The invention relates to an iron ore beneficiation equipment, in particular to a technical equipment suitable for refractory iron ore beneficiation. Background technique [0002] The principle of magnetization roasting is to remove the volatile substances (carbon dioxide, water) in the refractory iron minerals under heating, or to reduce the ferric oxide into ferric oxide. The magnetization roasting process of the traditional production process is realized in the shaft kiln and rotary kiln. [0003] The shaft kiln production process is relatively backward, prone to over-burning and under-burning, the reduction rate of iron ore is low, and it cannot handle raw materials that are prone to thermal pulverization such as limonite and siderite. [0004] The rotary kiln production process overcomes the above-mentioned shortcomings of the shaft kiln to a certain extent, but the heat consumption is high, and there are production operation problems such as ring...

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Problems solved by technology

[0003] The shaft kiln production process is relatively backward, prone to over-burning and under-burning, the reduction rate of iron ore is low, and it cannot handle raw materials that are prone to thermal pulverization such as limonite and siderite

[0004] The rotary kiln production process overcomes the above-mentioned shortcomings of the vertical kiln to a certain extent, but the heat consumption is high, and there are production operation problems such as ring formation, crust formation, and frit formation

[0005] Regardless of the shaft kiln or the rotary kiln, the heat and mass transfer speed is slow, the temperature adjustment lag time is long, the magnetic susceptibility of iron oxide in the calcined sand cannot reach more than 98%, and the production capacity of a single equipment is not very high.

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