Ore powder heating system, pouring asphalt concrete production device and production process

Abstract

The invention discloses an ore powder heating system. The ore powder heating system includes a feeding and distribution unit (141), a microwave emitting unit (142) A microwave heating chamber (143) and a delivery unit (144), wherein the microwave emitting unit includes a magnetron, a waveguide and a power supply; the microwave emitting unit (142) is located outside the microwave heating cavity (143); the conveying unit (144) passes through the microwave heating cavity (143), and the feeding and distribution unit (141) is arranged on the initial end of the conveying unit (144); and the feedingand distribution unit (141) spreads the mineral powder evenly on the conveying unit (144). The invention also discloses a pouring asphalt concrete production device, comprising the ore powder heatingsystem. The invention also discloses a pouring asphalt concrete production process. The ore powder heating system, the pouring asphalt concrete production device and the production process can heat the ore powder uniformly and efficiently, can precisely control the heating temperature of the ore powder, and has excellent dehydration effect.

Description

Technical field [0001] The invention relates to a mineral powder heating system, pouring type asphalt concrete production equipment and production process, and belongs to the field of engineering machinery. Background technique [0002] The construction temperature of castable asphalt concrete is usually 220~250℃, and the aggregate temperature is usually 350~400℃, which is much higher than the 160~180℃ aggregate temperature of ordinary asphalt mixture. The reason why the aggregate needs such high The main reason for the temperature is that the ore powder used is cold ore powder. The heat exchange occurs when the cold ore powder is mixed with the hot aggregate. The content of the castable asphalt concrete ore powder is usually as high as about 20%. Therefore, the cold ore powder needs to be Hot aggregate absorbs a lot of heat, but the heat exchange between the two mainly occurs in the short dry mixing process. Therefore, the uniformity and sufficiency of heat exchange are insuffic...

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Problems solved by technology

[0002] The construction temperature of cast asphalt concrete is usually 220-250°C, and the aggregate temperature is usually 350-400°C, which is much higher than the aggregate temperature of 160-180°C in the production of ordinary asphalt mixture, and the reason why the aggregate needs to be so high Temperature, the main reason is that the mineral powder used is cold mineral powder, heat exchange occurs when cold mineral powder is mixed with hot aggregate, and the content of castable asphalt concrete mineral powder is usually as high as about 20%, therefore, cold mineral powder needs to be obtained from Thermal aggregates absorb a large amount of heat, but the heat exchange between them mainly occurs during the short dry mixing process. Therefore, the uniformity and adequacy of heat exchange are insufficient, which is also the main reason affecting the quality stability of asphalt concrete. one

[0003] At present, some researchers in the industry have proposed a technical solution for heating the mineral powder. The solution is to use heat transfer oil to heat the mineral powder. This heating method is to heat the mineral powder through heat conduction. There are mainly two Problems in aspects: first, it is difficult to heat all mineral powders to the same degree, and the heating uniformity is difficult to guarantee; second, the adaptability to mineral powders with large water content is poor, and it is difficult to ensure the moisture content requirements of mineral powders. Problems in both aspects will have adverse effects on the quality of poured asphalt concrete

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