| CPC B01F 23/69 (2022.01) [B01F 29/80 (2022.01); B01F 33/8052 (2022.01); B01F 33/8364 (2022.01); B01F 35/2113 (2022.01); B01F 35/2115 (2022.01); B01F 35/71705 (2022.01); B01F 35/71731 (2022.01); B01F 2035/99 (2022.01); B01F 2101/38 (2022.01)] | 3 Claims |
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3. A production process for factory-mixed warm and hot recycled asphalt mixture, wherein the production process is implemented by using the production equipment for factory-mixed warm and hot recycled asphalt mixture,
wherein the production equipment of factory-mixed warm and hot recycled asphalt mixture, wherein the production equipment comprises a main mixer, a hot recycled material chute, a cold recycled material chute, a hot recycled material weighing hopper, a hot recycled material temporary storage hopper, a cold recycled material mixer, a cold admixture weighing hopper, a cold admixture temporary storage hopper, a cold recycled material elevator, a hot recycled material scraper conveyor, a rejuvenator platform, a first hot recycled material elevator, a flue gas treatment device, a second hot recycled material elevator, a cold admixture heater, a combustion hot air system, and a hot recycled material drying drum mounted in a region of an equipment building frame; and a cold admixture batching machine and a hot recycled material batching machine provided on a ground;
the hot recycled material chute and the cold recycled material chute are respectively mounted above the main mixer, and the hot recycled material weighing hopper and the hot recycled material temporary storage hopper are sequentially mounted above the hot recycled material chute, and the cold recycled material mixer, the cold admixture weighing hopper and the cold admixture temporary storage hopper are sequentially mounted above the cold recycled material chute;
materials of the cold admixture batching machine are conveyed to the cold admixture heater through a conveyor belt, and the cold admixture heater conveys the materials to the cold admixture temporary storage hopper through the cold recycled material elevator, and the rejuvenator in the rejuvenator platform is added to the cold recycled material mixer through an addition system:
the hot recycled material drying drum is provided between the second hot recycled material elevator and the first hot recycled material elevator, a temperature of the hot recycled material drying drum is controlled by the combustion hot air system, and an outlet of the first hot recycled material elevator is provided at the inlet of the hot recycled material scraper conveyor, and the materials of the hot recycled material batching machine are conveyed to the second hot recycled material elevator through a conveyor belt, and the cold admixture heater comprises heating units:
the process comprises:
feeding 30% to 50% of the recycled coarse aggregates into the counterflow-heated hot recycled material drying drum through the hot recycled material batching machine and a belt conveyor, and heating to above 120° C. in the hot recycled material drying drum, and heating the new aggregates to 200° C. through the hot recycled material drying drum, screening through a vibrating screen, and entering the mixing cylinder of the main mixer after weighing according to a mix proportion;
the recycled coarse aggregates heated to 120° C. and the new aggregates heated to 200° C. entering the mixing cylinder of the main mixer synchronously and add part of the asphalt for pre-coating;
placing 20% to 30% of recycled oil-rich fine aggregates in the cold admixture batching machine, conveying to the cold admixture heater through a belt conveyor for preheating to 80° C., lifting to the cold admixture temporary storage hopper through the elevator, and entering the recycled material mixer for pre-mixing with the rejuvenator after weighing by the cold admixture weighing hopper;
subsequently, after all the aggregates are weighed according to the proportion, entering the mixing cylinder of the main mixer through a chute, and being mixed with a remaining asphalt binder to complete the mixing process and produce the finished product of the recycled asphalt mixture;
when the addition amount of the recycled materials is 50% to 60%, a hot mixing method is adopted, and when it is greater than 60%, a warm mixing method is adopted.
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