Mixed station LQC80,Highly Efficient Screening Unit

Apr 29, 2023

Modular design, high productivity, low fuel consumption, environmental protection, globally sourced top quality components

Cold Feed System
Frequency-controlled belt feeder allows for independent and automatic adjustment of feed speed as per production and proportioning requirement. Sirens and warning lights are available to warn operators of aggregate starvation.  
Collection and transfer belt is provided with belt tensioner and belt alignment device. Trough belt prevents aggregates from overflowing. Self-cleaning is available for smooth delivery.
The scalping screen removes any oversized material from the aggregates and lets properly sized aggregates enter the drying system, so energy is saved.
Modular design allows for various types of hopper combinations.
Highly Efficient Screening Unit
Developed and manufactured with techniques originated from Europe, the screening machine delivers long service life and high reliability. Adequate screening area and optimum match between vibration angle and inclination angle enable the vibration screen to meet the conditions for strict component proportioning and high screening efficiency. Amplitude and centrifugal force of the vibrating screen are adjustable to adapt to various proportioning. Screening efficiency(rated) ≥95%;messing rate(nominal) ＜5%.

Drying and heating system
Optimized flights and lifter design allows system to achieve a more uniform heating.
The thermal system is designed with overall optimal parameter control concept to ensure full burning with stability and high heat utilization. Drying and heating efficiency increased by 1-5%.
The dryer drum is insulated with rock wool mats against heat loss.
The dryer drum friction driven by four individual electric motors directly coupled to the nylon support roller shafts offers the advantages of high reliability, high efficiency, low noise emission and long service life. Currently, it’s widely regarded as the best one for drum drives.
Optional burners are available to operate on diesel oil, heavy oil, residual oil, natural gas, coal, etc.

Hot Mineral Silo
Large capacity hot mineral silo effectively ensures ongoing production of the asphalt mixing plant. Flaps operated through double-stroke cylinders for coarse and fine dosage are jam-free and of low maintenance.
Construction of storage silo and dosing flap is optimized with due consideration to cumulative weighing time and weighing accuracy. Rapid and accurate weighing ensures that all components in the recipe are proportioned as appropriate.
Continuous level sensor or maximumminimum level sensor, temperature sensor, sampling chutes in mineral compartment and overflow channel enable you to have a thorough understanding of the operating conditions of all silo compartments.

Weighing Module
The weighing system with the weigh hopper resting on load cells maintains good weighing balance, thereby effectively resolving the problem of deviation of center of gravity.
World top brand load cells combined with automatic flying material dynamic adjustment module to ensure stable and accurate weighing.
Powerful negative pressure system of the mixing tower effectively isolates interference ensuring weighing accuracy during operation.

Top Quality Mixing Module
Pressurized bitumen is atomized via a multi-hole spray bar and filler is spirally distributed or discharged in axial direction of the mixer. Filler and asphalt are evenly distributed, thereby greatly reducing dry mixing times .  
Twin shaft compulsory mixer, driven by geared motor units via equal gear wheels. The special mixer design featuring a double paddle arm pattern for powerful and intensive stirring behavior, with low rotation speed and large capacity, effectively avoids segregation and secondary gradation changes during mixing ensuring unrivalled mixing quality.
Mixer shafts with labyrinth seals to ensure zero leakage.

Skip Unit and Mixed Material Storage
Separated Silo Pattern
Automatic skip unit features frequency controlled gear motors and high speed pulse encoder giving precise control of skip speed and positioning. This total control of the skip allows it to be smoothly accelerated along the track and then slowed as it approaches the required station. Independent pneumatically operated brake ensures reliable braking and accurate positioning.
The skip features a rotary unpowered soft touch opening discharge door offering the advantages of safe operation, low impact, thorough discharging and no spillage of material, as compared to traditional lever impingement opening type skip door.
The special interior design of the storage silo could effectively stop stored materials from segregating.

Integrated Silo Pattern
Integrated silo pattern offers the advantages of low power consumption, low failure rates, low emissions, economic on space, little segregation, low heat loss, easy extensions, etc.
Be it a separated silo pattern or an integrated silo pattern, all such devices as material level indicators, remote or site discharge door control, electric heating elements fitted on the hopper around discharge door, skip door anti-stick agent no-pump sprayer, etc can be configured.

Bitumen Storage and Heating System
Full-function bitumen tank equipped with mixer, level indicator, and automatic temperature control valve.
Optional independent discharge system permits on-line discharge of thermal oil without affecting plant operation.
Number of bitumen tanks and layout as per customer specifications  
The thermal oil heater equipped with a diesel oil burner provides automatic control of temperature thanks to a number of automated features. Examples include automatic ignition, automatic shutdown, automatic flame control and automatic fault-alarming.

Dust Collection System
Two-stage dust collection system; initial separator(gravitycyclone) and bag filter, which  has been recognized as one of the most efficient and reliable forms of dry dust collection with guaranteed emission levels of≤20mgn.m3.
The energy-saving, low-noise rotating reverse air valve mechanism is used for more thorough bag cleaning.
Fully enclosed vibration screen, coupled with negative pressure design for mixing tower, effectively prevents leakage of dust.
Optional reclaimed filler silo and wet collectors (venturi scrubbers) minimize dust emission and solve the problem of transportation.

Control System
Two high performance industrial computers employing the latest hardware technology and software packages link together several groups of function modules to form one integral site network for automatic production control and management.
The two computers are designed to work in parallel for reliable plant control and higher information processing capacity.
The user interface is simple and logically structured. The overall plant operating status, the most important monitoring parameters and all fault messages can be followed online on the screen.
Powerful document management functions make your management easier.
The sound-proof, heat-isolation and dust-proof control cabin is effectively isolated from the electrical cabinet, giving the operator an optimum working environment.

Extensions
Full-open design allows the plant to be extended with a number of auxiliary functions and devices, such as SMA liquid, granular and fiber additive adding system, rubber asphalt supply system, RAP hot recycling, etc.

Service
Our service system supported by XCMG’s powerful global sales network does everything possible to provide maximum customer support from pre-sales, sales to after sales with quick response to spare parts needs, professional factory-trained engineers and positive attitude towards service.