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 application
Ergonomic handling and large feed size
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 For sample amounts up to 10 l, the BB 400 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 BB 400 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 5 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.
ACCESSORIES FOR THE BB 400 JAW CRUSHER
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:
- Manganese steel
- Stainless steel
- Tungsten carbide
- Steel for heavy-metal free grinding
- NiHard4 steel
Hopper Types
Three hopper types are available for the BB 400 jaw crusher.
The standard hopper can be optionally equipped with a special infeed hopper. This additional hopper can be placed on a table for loading up to 10 l of sample material. By attaching it to the standard hopper with a connection rod, the sample is fed into the BB 400 with the help of a manual pusher.
A special hopper is available for quick and easy feeding of drill cores or large amounts of bulk material. The cover can be closed to serve as splash back protection.
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.
TYPICAL MATERIAL TYPES
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.
FUNCTIONAL PRINCIPAL
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.
The Jaw Crusher BB 400 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.
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 |
| Material feed size* | < 220 x 90 mm |
| Final fineness* | < 2 mm |
| Throughput* | 400 kg/h |
| Material of grinding tools | manganese steel, tungsten carbide, steel for heavy-metal free grinding, NiHard4 |
| Jaw width | 220 x 90 mm |
| Gap width setting | 0 – 30 mm |
| Gap width display | Scale |
| Zero point adjustment | yes |
| Wearing rate display | yes, up to minus 10 mm |
| Removable hopper | yes |
| 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 | 5.5 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 | ~ 400 kg |
| Standards | CE |
*depending on feed material and instrument configuration/settings
