Testing apparatus for research on reducibility of single-particle iron ore

Abstract

The invention discloses a testing apparatus for research on reducibility of a single-particle iron ore, which belongs to the field of ironmaking in the metallurgical industry. The testing apparatus comprises a reducing furnace, a quartz reduction tube, a weighing device, a protective device, a supporting device, a heating control device and a gas control device, wherein a furnace chamber and a heating device are arranged in the reducing furnace, the quartz reduction tube is fixed in the furnace chamber of the reducing furnace through the supporting device, the iron ore is disposed in a hanging basket and then hung below the weighing device through a suspension wire, the quartz reduction tube is provided with a reducing gas inlet and two reducing gas outlets, a thermocouple and a porous plate are arranged in the quartz reduction tube, the supporting device is provided with a water sealing groove, a protective cover is connected with the water sealing groove so as to realize sealing of the whole apparatus, flow of reducing gas is controlled by a mass flow controller, and a computer is connected with the weighing device to record data. The testing apparatus provided by the invention has the advantage that research on reducibility of the single-particle iron ore is realized through improvement of a weighing mode of a conventional determination apparatus for reducibility of iron ore.

Description

technical field [0001] The invention relates to a test device, more specifically a device for studying the reducibility of single particle iron ore, which belongs to the ironmaking field of the metallurgical industry. Background technique [0002] The reducibility of iron ore is a measure of the difficulty of removing oxygen combined with iron from iron ore with reducing gas; the degree of reduction is based on the state of ferric iron, and the deoxidation achieved after a certain period of time degree; reduction rate refers to the change value of reduction degree per unit time. To study the reducibility of iron ore, the reducibility of iron ore is generally reflected by indicators such as reduction degree and reduction rate. [0003] At present, the determination of the reducibility of iron ore is generally carried out by placing samples of a certain particle size range in a fixed bed, and using CO and N 2 The formed mixed gas is subjected to isothermal reduction at a tem...

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Problems solved by technology

The above-mentioned iron ore reducibility measuring device has the characteristics of simple structure and convenient operation, but it still has some shortcomings: the first is that when the sample is reduced in the fixed bed, the heating of the sample is not uniform due to the characteristics of the fixed bed , the distribution of reducing gas in the reduction tube is uneven, which will lead to inconsistent reduction degrees between samples, which will have an adverse effect on the study of the reduction mechanism of iron ore and the observation of microstructure changes

The second is to hang the reducing tube under the weighing device as a whole. Since the weight of the reducing tube itself is much heavier than the weight of the sample, and the reducing gas inlet and reducing gas outlet on the reducing tube are connected to the exhaust pipe, these will affect the measurement. The reliability of the sample mass change

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