Experimental device of iron ore pellets during drying and preheating processes and method thereof

An experimental device and technology of iron ore balls, applied in the field of ironmaking production, can solve the problems of different effects and reduced oxygen partial pressure, etc.

Inactive Publication Date: 2009-11-11
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

The heat recovery gas is usually the product gas after the blown air reacts with the pellets in the cooling section or the hot flue gas reacts with the pellets in the preheating section. Oxidation and other reactions reduce, resulting in a decrease in oxygen partial pressure; using such a gas to dry and preheat the pellets, compared with directly using air to dry and preheat the pellets, the effect is different

Method used

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  • Experimental device of iron ore pellets during drying and preheating processes and method thereof

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Embodiment Construction

[0011] An experimental device for the drying and preheating process of iron ore pellets, comprising a humidifier 1, a fan 2, a frequency converter 3, a first valve 4, an electric heater 5, an electric heater controller 6, a cleaning port 7, and a rectifier Section 8, Experiment Section 9, Electronic Balance 10, Standard Gas Interface 11, First Flow Meter 12, Second Valve 13, Programmable Logic Controller (PLC) 14, Computer 15, Ejector 16, Front of Porous Media Air Distribution Device Pressure measuring ring chamber 17, pressure measuring ring chamber 18 after the porous medium air distribution device, pressure measuring ring chamber 19 at the exit of the experimental section, experimental pellets 20, hanging basket 21, suspension frame 22, balance modification hole 23, standard gas carbon dioxide 24. Standard gas oxygen 25, standard gas nitrogen 26, simulated flue gas 27, temperature and humidity meter 28, first thermometer 29, second flow meter 30, second thermometer 31, third...

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Abstract

The invention relates to an experimental method of iron ore pellets during drying and preheating processes and a device thereof, which belong to the field of iron making. The device comprises a damping machine, a blower, a transducer, an electric heater, a heater controller, a clean-up port, a pressure-measuring ring chamber, a suspension bracket, a suspension basket, an electronic balance, a standard gas interface, a cylinder manifold, a valve, a PLC, a thermohygrometer, a thermograph, a flowmeter, a speedometer, a hygrometer, a computer, an injector, a commutation section, a porous medium air-distributing device, and the like. In the invention, simulation flue gas after being commutated can be produced, the experimental simulation comprises the processes of heat transfer, mass transfer and chemical reaction of the flue gas under the conditions of different humidity contents, different mol components, different flow field distribution, different temperature levels and different heating rates, and the simulation of the drying and preheating processes in actual production of the iron ore pellets provides more valuable reference frame for the actual production.

Description

technical field [0001] The invention belongs to the field of ironmaking production, and relates to an experimental device and method for the drying and preheating process of iron ore pellets. Background technique [0002] Iron ore pellets are important raw materials for blast furnace ironmaking and shaft furnace direct reduction, and the drying and preheating processes have an important impact on their quality. Whether it is the grate-rotary kiln process or the belt roaster process, the heat recovery gas is used to dry and preheat the green pellets. The heat recovery gas is usually the product gas after the blown air reacts with the pellets in the cooling section or the hot flue gas reacts with the pellets in the preheating section. Oxygenation and other reactions reduce the oxygen partial pressure; using such a gas to dry and preheat pellets has a different effect than directly using air to dry and preheat pellets. [0003] On the other hand, the flow field distribution h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/14
Inventor 冯俊小张宇张益阳赵志南谢知音张材陈艳梅
Owner UNIV OF SCI & TECH BEIJING
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