The Jaw Crusher BB 250 is specifically designed for accepting large feed sizes up to 120 x 90 mm. The gap width can be set stepless from 0-30 mm. Depending on the sample material, particle sizes down to 2 mm can be obtained, resulting in a crushing ratio of 45. A throughput of up to 300 kg/h is possible with the BB 250.
The RETSCH jaw crusher series is available in 8 different sizes. Throughput and final fineness depend on the crusher type, selected gap width and breaking properties of the sample material.
Robust design, simple handling and cleaning are the features of the RETSCH jaw crusher models. Small amounts of sample are processed batchwise; for larger amounts the crushers can be operated continuously.
Robust & Versatile
- Front door facilitates cleaning of crushing chamber
- Infinite/continuous gap width setting
- Wide range of materials for contamination free grinding
- Collecting receptacle with outlet for continuous operation
- Connector for dust extraction
- Scale indicates jaw wear
- Selection of hoppers for specific applications
Челюстна трошачка BB 250 Superiority in detail
For sample amounts up to 10 l, the Jaw Crusher BB 250 is used batchwise; for larger volumes it can be operated continuously. Thanks to the modular concept of the housing and frame, this jaw crusher is suitable for a wide range of applications.
A front door gives direct access to the crushing chamber at a perfect height for ergonomic and easy cleaning. The feed hopper with splash-back protection can be removed quickly and easily. The Jaw Crusher BB 250 has a connection for dust extraction and is protected against mechanical overload. A scale indicates the wear of the breaking jaws, informing the user when it is time for an exchange.
The crushing chamber is available in 6 different materials to ensure neutral-to-analysis sample preparation. The technical and safety features make this jaw crusher ideally suited for sample preparation in laboratories and for small scale production.
Front door allows for easy cleaning
Connection for dust extraction
Accessories for the jaw crusher BB 250
Breaking jaws
Breaking jaws and wearing plates are available in five different materials to be selected depending on the sample and the analysis to be carried out:
- манганова стомана
- неръждаема стомана
- волфрамов карбид
- стомана за смилане без присъствие на тежки метали
- неръждаема стомана 316L
- NiHard4 стомана
Hopper Types
Safety is a top priority with RETSCH jaw crushers. The feed hopper with splash-back protection cannot be accessed by hand. A safety switch and the brake motor ensure an immediate stop if the unit is opened or switched on incorrectly.
For easy cleaning of the crushing chamber, the hinged hopper can be removed in a few simple steps. The jaw crushers run very smoothly and quietly and are virtually maintenance-free.
Collecting vessels
In addition to the standard receptacle which accepts sample amounts up to 10 l, two options are available.
For continuous operation the collection funnel with outlet is the ideal choice.
The large volume receptacle accepts up to 26 liter of sample and comes with a flexible connection flange and a carrier on wheels. This version is the best choice for dust-free operation.
Челюстна трошачка BB 250 & Дискова мелница DM 200 Two-stage sample preparation in one step
The combi unit, featuring the Jaw Crusher BB 250 and the Disc Mill DM 200 connected via a cyclone separator, enables automated, continuous sample preparation. Material is directly transported from the jaw crusher to the disk mill, allowing large feed sizes to be processed in one step to a defined final fineness of small particles. This two-step grinding process is necessary for hard or brittle materials that require initial coarse reduction followed by fine grinding. The combi unit streamlines workflows, eliminates manual sample transfer, and significantly reduces processing time. It minimizes dust emissions and ensures efficient, reproducible results, making it an ideal solution for applications in agriculture, cement production, mining, precious metal analysis, materials research, and environmental analysis.
Application example of the combi unit
- Gap setting jaw crusher: 2 mm
- Gap setting disc mill: 0.2 mm
- Feed size: 60 mm
- Final fineness: 200 μm
- Sample amount: 1 kg
- Process time: 10 min
Cyclone System for Jaw Crushers Bye-bye Dust and Sample Loss
Whether you’re preparing samples in mining, precious metals, materials research, or environmental analysis, the RETSCH Cyclone System ensures efficiency, precision and safety like never before!
Why should you choose the RETSCH Cyclone System?
- Total Sample Recovery
Eliminate sample loss during crushing with our cyclone, ensuring accurate and reproducible results for every analysis!
- Enhanced Operator Safety
Our cyclone significantly reduces dust exposure, creating a safer and cleaner working environment for your team!
Plus: Existing instruments (BB 50, BB 250 or BB 400) can be retrofitted with the Cyclone System.
Челюстна трошачка BB 200 Типични материали за проба
RETSCH’s powerful jaw crushers are ideally suited for preliminary crushing of construction materials, ores, granite, oxide ceramics, quartz, slag, silicon, coal, tungsten alloys, cement clinker, etc.
To find the best solution for your sample preparation task, visit our application database.
Челюстна трошачка BB 250 Принцип на работа
The Jaw Crusher BB 250 is a robust and powerful forced-feed crusher. The feed material passes through the no-rebound hopper and enters the crushing chamber.
Size reduction takes place in the wedge shaped area between the fixed crushing arm and one moved by an eccentric drive shaft. The elliptical motion crushes the sample which is moved towards the crushing gap under gravity.
As soon as the sample is smaller than the discharge gap width, it falls into a removable collector within the jaw crusher. The continuous gap width setting with scale ensures optimum size reduction in accordance with the set gap width.
Челюстна трошачка BB 250 Technical Data
| Applications: | coarse and pre-crushing |
|---|---|
| Field of application: | chemistry / plastics, construction materials, engineering / electronics, environment / recycling, geology / metallurgy, glass / ceramics |
| Feed material: | medium-hard, hard, brittle, tough |
| Size reduction principle: | pressure |
| Max. feed size: | < 120 x 90 mm |
| Final fineness: | < 2 mm |
| Throughput: | 300 kg/h |
| Material of grinding tools: | manganese steel, stainless steel, tungsten carbide, steel for heavy-metal free grinding, stainless steel 316L, NiHard4 |
| Jaw width: | 120 x 90 mm |
| Gap width setting: | 0 - 30 mm |
| Gap width display: | scale |
| Zero point adjustment: | 3,4 mm |
| Wearing rate display: | 4,6 mm |
| Removable hopper: | 6,9 mm |
| Dust extraction unit: | yes |
| Central lubrication: | no |
| Process line version: | optional |
| Collector capacity: | 10 l |
| Base frame: | vario frame (adjustable for continous crushing) |
| Drive: | 3-phase motor |
| Drive power: | 3.0 kW |
| Electrical supply data: | different voltages |
| Power connection: | 3-phase |
| Protection code: | IP 55 |
| W x H x D closed: | 695 x 1399 x 719 mm |
| Net weight: | ~ 350 kg |
| Standards: | CE |