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Sampling, Splitting & Dosing

The standard in cement and other material types
The screw sampler HR-SN is the standard in many cement plants and other production facilities which require sampling of powder material. The HR-SN is designed for easy mounting in vertical or inclined drop chutes. The screw lenth may vary between 240 and 460 mm according to application and constructional conditions. Due to its design the HR-SN enables a long-standing operation without complications.

Flexible at use
The semicircular-section trough of the sampler projects into the material flow with the open side facing upwards. The screw conveyor transports the sample material via a downcomer directly into the downstream plant station HR-BM. Here, the sample can be collected within the mixer. Alternatively, the material can be filled directly into a pneumatic carrier or cup for transportation into the laboratory. Optionally, the sample can be filled into a collecting container without plant station. The sampling cycle is controlled by the PLC of the plant station.

HR-SN: Screw Sampler

Proven technology
The HR-RN air slide sampler is designed for the sampling of powder and fine-grain materials from horizontal air conveyor troughs. The HR-RN is a well-proven sampler which is used in many cement plants and other production facilities.

Reliable sampling
A perforated collecting tube located vertically in the air conveyor trough retrieves the sample from the material flow. The perforations in the collecting tube are rotated into the material flow for the purpose of sampling. In the closed condition, the holes are turned in the opposite direction. The collecting tube is driven pneumatically. Once retrieved, the sample can be transported through a downcomer directly into a downstream process station. The sampling cycle is controlled by the controller of the process station.

HR-RN: Air Slide Sampler

Reliable sampling of coarse-grain material
The HR-KN clinker sampler is designed for the sampling of coarse-grain material from vertical material shafts located beneath the belt discharge point. A hydraulically operated sampling chute is swivelled upon demand into the material flow, and retrieves a precise sample quantity defined by the chute volume.
Modular design for easy integration into automatic pneumatic transportation
The sample is then transported by tube systems or a vibratory chute to the downstream components. In the plant station HR-LKC the sampled material can be crushed by, e.g., jaw crusher, split and dosed in a pneumatic carrier for pneumatic transportation into the laboratory. Various preparation steps can be combined in the HR-LKC. The sampling cycle is controlled by a programmable controller.

HR-KN: Clinker Sampler

Standard in cement and other material types
The HR-PN piston sampler is designed for the sampling of powder and fine-grain material from vertical or inclined drop shafts. A pneumatic operated sampling piston is moved into the material flow and retrieves a precise sample quantity defined by the volume of the piston. The sample is transported by tube systems or vibratory chutes to the downstream components. 

Flexible at use
Usually, the sampler HR-PN is linked to the plant station HR-BM. Here, the sample can be collected within the mixer. Alternatively, the material can be filled directly into a pneumatic carrier or cup for transportation into the laboratory. Optionally, the sample can be filled into a collecting container without plant station. The sampling cycle is controlled by the PLC of the plant station.

HR-PN: Piston Sampler

Sampler for various applications
The HP- LN is a closable spear sampler for sticky and free-flowing material. Even materials with a moisture content of up to 40% can be collected. This allows a primary sampling of various materials from trucks, freight cars, silos, hoppers and others.

Flexible in use
The HP- LN can be connected to different handling systems including diggers, portal systems and robots. Due to the hydraulically driven rotary mechanism, the spear can be closed even under difficult circumstances and high bulk density.

Flexible in configuration
According to specification and handling system working length, diameter and apex of the spear sampler are customizable. As the spear samplers are easily interchangeable, different samplers can be used for different materials.

HP-LN: Spear Sampler

Specially designed for slurry material
The HR-SC is a representative cutter for secondary sampling of slurries as produced in flotation plants for mineral processing. Following the primary sampling the slurry sample is transported pneumatically to the laboratory and collected within a vessel. After accumulation of the appropriate material amount secondary sampling takes place using the the HR- SC. Due to the solid content of the slurry and the further sample preparation the secondary sample volume is 1-2 l. Usually, filter presses and ovens are used for further water removal. Subsequently, the dry powder material can be further processed by, e.g., grinding, pelletizing, fusion and other procedures.

Representative splitting of various material types
Dependent from material and solid content the split ratio of the HR-SC is between 1:3 and 1:20. By adapting the splitting frequency, the HR- SC can process various different materials. The linear splitting mechanism allows production of a representative secondary sample for reliable analysis results of concentrates and tailings.

HR-SC: Slurry Cutter

Optimized for sampling of hot powder material
The HR-KNH sampler is designed for the sampling of hot powder and fine-grain material from inclined drop shafts. A linear conveyor transports a spoon into the material stream. After the retraction and unloading of the spoon, the material falls through a funnel into the sending station. The system can be used for both cross-sectional and random spot sampling. The sample quantity can be adjusted by control of the sampling strokes. The sampling cycle can be controlled by the PLC of a process station.

Flexible configuration Optionally, the HR-KN/H is available as an extra-robust version with hydraulic drive and welded frame. Furthermore, a water-cooled feeder is obtainable as an additional sample cooling device. Usually, the sampler HR-PN is linked to the plant station HR-BM. Here, the sample can be collected within the mixer. Alternatively, the material can be filled directly into a pneumatic carrier or cup for transportation into the laboratory. Optionally, the sample can be filled into a collecting container without plant station.

Main features:
  • Slotted piston with pneumatic drive
  • Cooling system with fan
  • Maximum sample grain size 200 µm
  • Max. sample temperature 900 °C

HR-KNH: Hot Meal Sampler

Extremely robust for coarse-grain material
The scoop sampler is an extremely robust spoon sampler for clinker material with a vertical flow. The hydraulic operated spoon is swung out into the clinker stream upon demand and retrieves a defined sample material as determined by the spoon volume.
Flexible at use
The sample is then transported by a tube system to the downstream component like, e.g., sample box, crusher, clinker plant station.

Main features:
  • Scoop sampler
  • Hydraulic operated
  • Maximum sample Size 50–100 mm
  • Max. sample temperature: 100 °C

Scoop Sampler for Clinker

Uncomplicated volumetric dosing
The HP- SCD is a rotating scoop dosing device for integration into robot cells. The HP- SCD enables uncomplicated, quick and precise volumetric dosing of sub-samples for further processing. Nearly all material types can be dosed unless they are dry with a grain size of 150 µm and smaller. The sub-sample volume depends from the volume of the scoop and can be adapted according to the application.

Designed for use in robot cells
The robot inserts the material container into the HP- SCD. The scoop extracts the sub-sample from the rotating container. Subsequently, the scoop and moves to the transfer position. Here, the extracted subsample is transferred from the scoop into a small cup. This process can be repeated several times until the required number of sub-samples has been generated from the material.

Flexible in use
After completion of dosing, the scoop is cleaned by compressed air to prevent cross-contamination of subsequent samples. The robot picks up the cups containing the sub-samples and transports them to the next device for further processing. Alternatively, cups with sub-samples are forwarded using transport belts. The robot removes the large container from the HP- SCD and the dosing device is available for dosing of further samples.

HP-SCD: Scoop Dosing Device

Dosing of various materials
HERZOG offers different technologies for discontinuous gravimetric precision dosing of sample material for various applications. In our machines and automations, we are deploying different dosing methods to meet the specific requirements of each application and material. We are using vibration and knocking procedures as well as special dispensing heads for dosing of fine-grained and dry powder material. For particular materials like, e.g., metallic additives, dosing takes place by vibro feeders with limited cross section.

Flexible in use
The dosing units can work as stand-alone machines or as modules within larger units or automations. All units are designed that a smallest possible area comes in contact with the sample material to avoid cross-contamination of subsequent samples.

High-precision dosage
The integrated high-precision scales guarantee maximum accuracy and reproducibility of weighing results. The specially developed control software has been optimized for best performance in time and precision. For hygroscopic material, there are special container available for reduced moisture uptake and a longer storage period.

Gravimetric Dosing Units

Usable for many areas of application
There is a wide commercial potential including materials like, e.g., PGM recycling, mining, food, feed, pharma, secondary raw materials, recyclates in general, agricultural products and seeds.

Specially designed for representative splitting
The design of the HP- RSD/S considers several criteria which has to be accounted to ensure a small increment delimitation error. The sample is introduced to the HP- RSD/S via a coated or polished steel cup. Subsequently, the material is poured on a vibration feeder. The cup emptying is realized by a slow and constant tilt-turning movement to minimize the development of fine dust and reduce loss of material. This procedure also reduced the possibility of material hump build-ups influencing the splitting result by varying the material feed rate. Vibration introduced material transport is the best technical approach to provide a constant material stream.

Precise control of angular velocity
The servo drive of the splitter wheel allows setting a specific speed in correlation to the feeding rate to ensure that such a high number of Q can be realized and a constant speed is kept.

Minimized loss of material and contamination
The surfaces of parts getting in contact with the sample material are either coated or polished to minimize sticking and allow full sample recovery. Additional mechanical features like vibrators and knockers are supportive to remove any clogging material. After splitting all surfaces in contact with the material are cleaned automatically by means of compressed air. All sections prone for material accumulation are provided with a dedicated blowing nozzle setting. They can be controlled individually. The design of the chute opening or section of the splitter wheel can be customized for each application. This is also true for the feed opening of the vibration feeder.

Robot operation as an option
The HP- RSD/S can be either operated as a stand-alone machine or can be incorporated in an automatic robotic laboratory. The semi-automatic stand-alone version of the HP-RSD/S covers the reproducible material feed, splitting and cleaning (excluding sample cups). In the full automatic version the whole cup handling and cleaning will be realized by an industrial robot. The HP- RSD/S can be either connected to following preparation/handling system or a bagging machine.

HP-RSD/S: Rotary Sample Divider (Small)

Large-volume splitter for various applications
The HP- RSD/L is a rotary sampler divider for secondary or tertiary sampling of large-volume samples. The HP-RSD/L is applicable for a variety of lumpy materials with a grain size up to 30 mm like, e.g., ores, stones and others.

Specially designed for representative splitting
The HP- RSD/L is typically fed using a robot or a conveyor. Standard units include a 144kg or 288kg divider using 40kg or 80kg buckets. The splitter drum rotates at a set speed and splits the sample by means of the segmented compartments that feed into sample containers at the segment exit.

The sample split is predetermined by the number and angle of the segments. 4-10 splitting chambers are available to suit the customers’ application. The HP- RSD/L features steep valley angles on all internal surfaces to ensure that no sample material gets stuck, which minimizes cross-contamination. The unit is PLC controlled and automatically weighs each aliquot after splitting to ensure that the split was successful.

Configurable according to customer’s requirements
The typical design features triple hoppers that allow sample compositing within them. In practice, this is perfect for building A and B cut composites in a single RSD unit which saves on robot handling time and streamlines the process. Alternatively, the HP- RSD/L can be fed using a long conveyer belt from the robot cell to the splitter. This version is useful for robot automation with limited available space.

HP-RSD/S: Rotary Sample Divider (Large)

Applicable for various materials
The HP- CSS is suitable to divide representatively different kind of powder material with an ingoing mass up to 15 kg. This is possible because the rejected material is continually removed from the splitter. The sub-sample size is only limited by the physical characteristics of sliding carriage speed a.o. necessary to obtain the flexibility of user defined mass specifications.

Absolute flexibility
The HP-CSS unit itself consists of a sliding carriage, which is moving above the linear-arranged tripartite sampling chamber. The outer two of these sampling chambers can be closed mechanically with a flap valve. This feature facilitates a designed flexibility to vary the number of sub-samples which can be extracted during automatic operations. The splitting parameters are recorded in different preset splitting programs stored in the software, corresponding to the characteristics of each material type processed. The desired splitting ratio can be selected.

Specially designed for representative splitting without contamination
The material transport into the splitting unit is realized by a vibration feeder, which provides a constant material flow during the splitting process. The vibration feeder is equipped with a scraper to eliminate material humps providing a steady material flow. Additionally the material can be monitored with a flow sensor to ensure that the whole input sample has passed the splitter. The defining principle is to achieve as many increments from the sliding carriage as possible for each active sub-sample cup, reaping the greatest composite bed-blending advantage. The gap opening of each splitting chamber is 35 mm. To avoid cross-contamination between each sample, the whole splitter and connected pipes are cleaned by means of compressed air.

Variety of applications
The HP- CSS is available as a stand-alone equipment or as integral part of many machines like HP-WCSA, HP-BTM, lump breaker and others.

HP-CSS: Variable Cross-Stream Splitter