Stationary Asphalt Mixing Plant
DHB Stationary Asphalt Mixing Plant
A Stationary Continuous Drum Mix Asphalt Plant (also known as a Continuous Asphalt Mixing Plant or Parallel-Flow / Counter-Flow Drum Mixer) is a streamlined, highly economical asphalt production system engineered for steady, continuous production of standard hot mix asphalt (HMA).
Capacity available: 20t/h to 120t/h
Fuel: diesel, heavy oil, gas or coal
Control system language available: Chinese; English; Russian; French; Spanish.
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PRODUCT DESCRIPTION
Henan Shengmao Machinery Co., Ltd. (Shengmao Machinery) manufactures the DHB Series Stationary Continuous Drum Mix Asphalt Plants (ranging from 20 t/h to 120 t/h). Engineered as a highly cost-effective, durable, and fuel-efficient asphalt production solution, the DHB Series is specifically tailored for international contractors seeking maximum return on investment (ROI), rapid site erection, minimal maintenance downtime, and continuous non-stop asphalt paving output.
Core Working Principle & Characteristics:
Integrated Drying & Mixing in a Single Drum: Unlike tower-type batch plants that require separate drying, screening, and pugmill mixing steps, a continuous drum plant combines aggregate drying, heating, and liquid bitumen coating into a single rotating drum.
Continuous Proportioning & Dosing: Cold aggregates are precisely pre-metered via multi-bin feeders with variable-speed belts and electronic belt scales, then continuously fed into the drying drum where pressurized liquid bitumen is sprayed directly onto the heated aggregates.
High Cost-Efficiency & Low Investment: By eliminating the heavy multi-deck screening tower, hot aggregate bucket elevator, and separate twin-shaft mixer, it reduces upfront equipment capital investment (CapEx) by 30% to 50%.
Energy-Saving & Low Power Demand: Operates on a much lower connected electrical load (25% to 40% lower kilowatt power), significantly reducing fuel and electricity consumption per ton of asphalt.
Key Applications: Widely utilized in rural road hardening, township connectivity roads, highway base-course layers, road widening, pavement rehabilitation, and remote infrastructure projects where budget efficiency and continuous output are critical.
PARAMETERS
Drum type
|
Technical Parameters |
DHB20 |
DHB40 |
DHB60 |
DHB80 |
DHB100 |
DHB120 |
|
Rated Output Capacity |
20 t/h |
40 t/h |
60 t/h |
80 t/h |
100 t/h |
120 t/h |
|
Mixing Mechanism |
Continuous Rotating Drum |
Continuous Rotating Drum |
Continuous Rotating Drum |
Continuous Rotating Drum |
Continuous Rotating Drum |
Continuous Rotating Drum |
|
Cold Feeder Bins |
3 Bins |
3 – 4 Bins |
4 Bins |
4 Bins |
4 – 5 Bins |
4 – 5 Bins |
|
Dust Collection System |
Cyclone + Water Scrubber |
Cyclone + Water Scrubber |
Water Scrubber / Baghouse |
Water Scrubber / Baghouse |
Nomex Pulse Baghouse |
Nomex Pulse Baghouse |
|
Total Installed Power |
~45 – 50 kW |
~70 – 75 kW |
~110 – 128 kW |
~145 – 165 kW |
~180 – 200 kW |
~220 – 240 kW |
|
Compatible Fuels |
Diesel / Heavy Oil / Gas / Coal |
Diesel / Heavy Oil / Gas / Coal |
Diesel / Heavy Oil / Gas / Coal |
Diesel / Heavy Oil / Gas / Coal |
Diesel / Heavy Oil / Gas / Coal |
Diesel / Heavy Oil / Gas / Coal |
|
Oil Consumption Rate |
5.5 – 7.0 kg/t |
5.5 – 7.0 kg/t |
5.5 – 7.0 kg/t |
5.5 – 7.0 kg/t |
5.5 – 7.0 kg/t |
5.5 – 7.0 kg/t |
|
Installation Time |
7 – 10 Days |
7 – 10 Days |
7 – 14 Days |
7 – 14 Days |
10 – 14 Days |
10 – 14 Days |
CORE PARAMETERS
Capacity available: 20t/h to 120t/h
Fuel: diesel, heavy oil, gas or coal
Control system language available: Chinese; English; Russian; French; Spanish.
CORE SELLING POINT
30% to 50% Lower Initial Capital Investment (CapEx)
Streamlined Architecture: Integrates cold aggregate drying, burner heating, pressurized liquid bitumen injection, and continuous mixing into a single heavy-duty rotating drum. Accessible Entry Cost: Eliminates the expensive multi-deck vibrating screen tower, hot elevator, and separate twin-shaft mixer, drastically lowering equipment acquisition costs for contractors and tenders.
25% to 40% Lower Electrical Power Consumption (OpEx)
Low Connected Electrical Load: Total installed power ranges from only ~45 kW (DHB20) to ~240 kW (DHB120), significantly cutting electric utility bills and enabling smooth operation with smaller, cost-effective on-site diesel generator sets.
Continuous High-Volume Production & Fleet Efficiency
Non-Stop Mixing: Continuous material feeding and instantaneous bitumen coating eliminate batch cycle waiting times, providing steady, high-velocity truck dispatch for fast-track road paving.
Multi-Fuel Thermal Efficiency & Energy Savings
Versatile Fuel Combustion: Low-NOx industrial burners compatible with Light Diesel, Heavy Oil, Natural Gas / LNG, and Pulverized Coal. Fuel Consumption: Highly efficient internal drum flight design keeps oil consumption down to 5.5−7.0 kg/t (oil) or approx. 10−13 kg/t (coal).
Compact Footprint & Simplified Civil Engineering
Minimal Foundation Work: Requires only simple flat concrete pads or strip footings rather than heavy multi-story tower foundations, saving thousands of dollars in site preparation costs. Rapid Commissioning: Modular pre-fitted components with standardized bolt connections allow full on-site assembly, wiring, and trial mixing within 7 to 14 days.
Ultra-Low Maintenance Overhead & High Uptime
Fewer Mechanical Wear Parts: With no vibrating screen meshes to blind or mixer liner plates to replace, maintenance downtime and spare-part inventories are substantially reduced.
RECOMMENDED USAGE SCENARIOS
Rural Road Networks & "Farm-to-Market" Road Hardening
Project Scope: High-mileage rural road modernization, village connectivity corridors, and secondary agricultural access roads with cost-sensitive budgets.
Why Shengmao DHB Fits: 30% to 50% lower initial equipment cost and continuous high output make it the most economical choice for long-distance rural asphalt paving.
Recommended Models: DHB40, DHB60, DHB80 (40 – 80 t/h).
Road Base Courses & Asphalt-Treated Permeable Bases (ATPB)
Project Scope: High-volume production of black base courses, asphalt-treated permeable sub-bases, and leveling layers for highways and regional corridors.
Why Shengmao DHB Fits: Delivers continuous high throughput of standard hot mix asphalt at a fraction of the operating cost of complex tower-type batch plants.
Recommended Models: DHB80, DHB100, DHB120 (80 – 120 t/h).
Highway Shoulder Paving, Widening & Pavement Overlays
Project Scope: Emergency lane paving, highway shoulder widening, structural road overlays, and routine pavement maintenance contracts.
Why Shengmao DHB Fits: Steady, uninterrupted asphalt output keeps pace with continuous mobile asphalt pavers advancing along linear road sections.
Recommended Models: DHB60, DHB80, DHB100 (60 – 100 t/h).
Remote Infrastructure, Mining Haul Roads & Energy Projects
Project Scope: Isolated project sites in desert, mountain, or island terrains (mine access roads, hydro-dam corridors, wind/solar farm access roads).
Why Shengmao DHB Fits: Low electrical power requirements (~45–200 kW) allow the entire plant to run dependably on modest on-site diesel generators where grid power is unavailable. Minimal wear parts ensure high reliability in remote areas with limited spare-part logistics.
Recommended Models: DHB20, DHB40, DHB60, DHB100 (20 – 100 t/h).
Municipal Road Rehabilitation & Small-to-Medium Paving Jobs
Project Scope: County road repairs, township street resurfacing, industrial park internal roads, and commercial parking area paving.
Why Shengmao DHB Fits: Compact site footprint and fast 7–10 day setup enable rapid deployment and relocation across multiple regional job sites.
Recommended Models: DHB20, DHB40, DHB60 (20 – 60 t/h).
FAQ
Q1:How does a continuous drum mix plant differ from a batch mix plant?
A1:
A: Drum Mix (DHB Series): Continuously dries, heats, and mixes cold aggregates with liquid bitumen inside a single rotating drum in a seamless flow. It has no screening tower or separate pugmill, resulting in 30%–50% lower initial cost and 25%–40% lower power consumption.
Batch Mix (LB Series): Separates aggregates by size using a vibrating screen tower and weighs each component in discrete batches inside a twin-shaft pugmill, which is required for high-specification projects like expressways and airport runways (SMA/PMB).
Q2:What capacity models are available in the Shengmao DHB Series?
A2:
A: Shengmao manufactures 6 standard stationary drum mix models:
DHB20: 20 t/h (~45–50 kW total power)
DHB40: 40 t/h (~70–75 kW total power)
DHB60: 60 t/h (~110–128 kW total power)
DHB80: 80 t/h (~145–165 kW total power)
DHB100: 100 t/h (~180–200 kW total power)
DHB120: 120 t/h (~220–240 kW total power)
Q3:How is the aggregate-to-bitumen ratio controlled without a batch weighing scale?
A3:
A: Shengmao DHB plants utilize an automated continuous proportioning system:
Cold aggregates are metered from multi-bin feeders via variable-frequency drive (VFD) belts and weighed continuously on a high-precision electronic belt scale.
The computerized controller automatically synchronizes the aggregate mass flow with a variable-speed positive displacement bitumen pump and digital flow meter, ensuring a precise, uniform bitumen-to-aggregate coating ratio.
Q4:What burner fuels can be used, and what is the typical consumption rate?
A4:
A: Burners are available for Light Diesel, Heavy Oil, Natural Gas / LNG, and Pulverized Coal:
Diesel / Heavy Oil: Approx.5.5−7.0 kg/t finished asphalt mix.
Pulverized Coal: Approx. 10−13 kg/t finished asphalt mix.
Q5:What dust collection systems are equipped on DHB plants?
A5:
A: Depending on local environmental regulations, Shengmao provides two filtration options:
Standard System: Primary gravity cyclone collector + secondary water film scrubber (cost-effective, durable).
Eco System: Primary cyclone separator + secondary pulse-jet Nomex baghouse filter (≤20 mg/Nm3 dust emissions, meeting strict urban environmental codes).
Q6:What site civil works and auxiliary equipment are required?
A6:
A: Civil Works: Simple flat concrete pads or strip footings (no deep excavation or complex tower foundations required).
Auxiliary Equipment: Wheel loader (to charge cold bins), direct-fired or thermal oil heated bitumen storage tanks (20T–50T), dump trucks, and a 3-phase industrial power supply or diesel generator.
Q7:How long does delivery, installation, and commissioning take?
A7:
A: Standard factory manufacturing lead time is 20 to 30 days. On-site mechanical installation, electrical hookup, and trial production typically take 7 to 14 days with the assistance of Shengmao's technical installation engineers.
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