Rapid detection method and device for ferrous oxide in sintered ores

Abstract

The invention discloses a rapid detection method and a device for ferrous oxide in sintered ores. The detection method comprises the following steps: subjecting a sample to a pre-treatment, establishing a standard curve between the sintered ore magnetic conductivity and the corresponding ferrous oxide content in the sintered ore, and finally substituting the measured sample magnetic conductivity into the standard curve between the sintered ore magnetic conductivity and the ferrous oxide content to calculate the concentration of ferrous oxide in the sinter ore sample. The device comprises a detection signal generating unit, the upper end of the iron core of the transformer of the detection signal generating unit is provided with a magnetic circuit disconnecting gap, the magnetic circuit disconnecting gap is provided with a sample measuring cavity, which is used to place an sintered ore sample and make the sample contact and connect to the iron core; a signal collecting unit is used to convert the collected voltage signals into magnetic conductivity signals and then transmits the magnetic conductivity signals to a signal processing unit, the signal processing unit is used to substitute the magnetic conductivity into the standard curve to calculate the ferrous oxide concentration of the sample, and the device has the advantages of low detection cost, rapid analysis speed, and accurate detection result.

Description

technical field [0001] The invention relates to a ferrous oxide determination method, in particular to a rapid determination method and device for ferrous oxide in sintered ore. Background technique [0002] Iron and steel plants use a large amount of sintered ore as the main raw material in blast furnace ironmaking production. Sintered ore is mixed with various powdery iron-containing raw materials, mixed with an appropriate amount of fuel and flux, added with an appropriate amount of water, and mixed or pelletized at high temperature. The sintering equipment makes the material undergo a series of physical and chemical changes, and the ore powder particles are bonded into blocks. The content of ferrous oxide in sinter is a comprehensive indicator of sinter production, and its content is directly related to the ratio of raw materials and the control of sintering process. FeO is produced at high temperature in a molten state. The more FeO produced, the more heat is needed. T...

AI Technical Summary

Problems solved by technology

[0003] At present, the detection methods of ferrous oxide content in sinter include chemical analysis method, potentiometric titration method, X-ray diffraction fluorescence method, etc. Generally, acid dissolution and potassium dichromate volumetric titration method are used, and the implementation standard is IS09035-1989 "Iron Ores - Determination of Acid-Soluble Ferrous Content - Titration Analysis Method" and GB / T6730.8-86 "Iron Ore - Potassium Dichromate Volumetric Method for Determination of Ferrous Content", etc., the measurement time is generally about 60min, and the analysis time It is too long and cannot meet the needs of fast and timely guidance of sintering production. It is time-consuming and labor-intensive. At the same time, the discharge of chemical substances such as potassium dichromate and heavy metals will cause certain pollution to the environment; X-ray fluorescence analysis can quickly determine Total iron content, but this process analyzes the element content by selecting different wavelengths of the element (different sensitivities) and the corresponding fluorescence light intensity function relationship. It cannot distinguish the valence state of the element, so it can only analyze and test the total iron element content, but cannot distinguish It is elemental iron, ferrous oxide, ferric oxide, ferric oxide, etc.; although X-ray diffraction fluorescence method can distinguish FeO from the structure, but its inherent principle is not ideal for the actual application of FeO, and at the same time, the equipment cost of this method is high , the detection reproducibility cannot guarantee the actual applicability of sintering production, and the guidance for production is poor

Images