Iron-ore-suspension-furnace-inside real-time pressure and particle concentration measuring device and method

Abstract

The invention proposes an iron-ore-suspension-furnace-inside real-time pressure and particle concentration measuring device and a method, wherein the device comprises a gas supply system, a continuous material supply system, a reduction furnace, and a pressure acquiring and processing system. The side wall of the furnace body of the reduction furnace is provided with a pressure sensor, and the furnace body is provided therein with a wind-distribution plate which divides the inside of the furnace body into a reduction chamber and a wind chamber. The pressure acquiring and processing system comprises an NI data acquiring card and a computer. The method comprises: 1) using mineral powder to form material seal on the wind distribution plate; 2) adding the mineral powder into the reduction chamber of the reduction furnace and having the air compressor communicated with air; 3) determining that the system runs stable when the solid flow rate for discharged materials is identical to that for the incoming materials; 4) starting the computerized LabVIEW software for measurement; and 5) through the solution of the absolute pressure value, seeking the static pressure difference and calculating the concentration of solid particles. According to the invention, it is possible to accurately measure the real-time pressure at every position inside the reduction furnace as well as the average concentration of some parts of particles. The device is simple and economic and can be operated conveniently. In addition, the device is also timely and synchronous.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a device and method for measuring real-time pressure and particle concentration in an iron ore suspension roasting furnace. Background technique [0002] Iron ore resources such as fine-grained hematite, oolitic hematite, specular limonite, and stockpiled iron tailings are difficult to use conventional beneficiation techniques due to their fine crystal grain size, complex mineral composition, and low iron occurrence. To obtain ideal technical and economic indicators, it is difficult to obtain large-scale industrial development and utilization, or some resources can be developed but the utilization efficiency is extremely low. [0003] Magnetization roasting-magnetic separation technology is an effective way to process the above-mentioned iron ore resources. Suspension magnetization roasting has the advantages of sufficient gas-solid contact, good heat and mass transfer...

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Problems solved by technology

[0004] Although the new technology of suspension roasting of complex and refractory iron ore can greatly improve the iron grade and recovery rate, there are still problems such as uneven quality of reduced products and poor discharge during the test process of suspension roasting. The research on particle motion state in the furnace during the roasting process is insufficient; if we can have a clear understanding of the gas-solid two-phase flow characteristics in the furnace under different operating conditions, it will have important guiding significance for the regulation of the entire roasting process and the stable operation of the system; but due to The entire process of the suspension roaster is operated at high temperature, and most measurement methods cannot achieve high temperature operation. Therefore, at this stage, most scholars use the cold test method to systematically study the gas-solid flow characteristics.

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