Experimental method for increasing temperature of sintered mixtures in laboratory

Abstract

The invention relates to an experimental method for increasing the temperature of sintered mixtures in a laboratory, and belongs to the technical field of iron ore sintering laboratory experiments inthe metallurgy industry. An electric oven is adopted to preheat mixtures to simulate a steam preheating effect to increase the temperature of the mixtures; the experimental method of influencing on the sintering process and indexes by the temperature of the mixtures is performed, so that the defect of the laboratory incapable of adopting the steam preheating to increase the temperature of the mixtures for system sintering experiments is broken through; and the method is simple, feasible, safe and reliable. Through heating and sintering system experiments, the rules of influencing on the sintering process and the indexes by the temperature of the mixtures can be found out, and the guidance and the evidence can be provided to industrial experiments and application.

Description

Technical field [0001] The invention relates to a laboratory test method for increasing the temperature of a sintering mixture, and belongs to the technical field of iron ore sintering laboratory test in the metallurgical industry. Background technique [0002] The temperature of sintering mixture is one of the important factors restricting sintering production. If the temperature of the sintering mixture is lower than the sintering "dew point" temperature (generally 60℃~65℃), during the sintering production process, the moisture in the upper part of the sintering material layer will not be discharged with the exhaust gas, but will condense into the lower part of the material layer. Water, forming a wet zone. Due to the increased resistance to thickening of the over-wet zone, the air permeability of the sintered material layer is seriously affected, the vertical sintering speed is reduced, and the output of the sintered ore decreases and the quality deteriorates. In order to av...

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Problems solved by technology

Due to the strict requirements for safe operation of high temperature and high pressure steam, it is difficult to conduct experiments using steam to preheat the mixture in the laboratory due to the limitation of conditions. The main reason is that the steam flow and the moisture content of the mixture are difficult to control, and the safety is not guaranteed.

Therefore, no steam preheating mixture test is used in the laboratory, and it is difficult to provide guidance and basis for industrial tests and applications.

Therefore, under the condition of not using quicklime, the temperature of the mixture in the laboratory test is generally carried out at room temperature, and the highest is generally around 40°C, which cannot meet the requirements of the sintering "dew point" temperature of the mixture above 60°C to 65°C. There is a large gap between the test results and the material temperature of the actual industrial production on site, and it is difficult to achieve the purpose of guiding practice

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