Technical articles

Mechanical Processes for Recycling Waste Electric and Electronic Equipment with the Rotorshredder and Rotor Impact Mill

AUFBEREITUNGS TECHNIK

In plants for the recycling of waste electric and electronic equipment (WEEE) as well as for conven-
tional mineral processing, the comminution equipment dictates whether and how the specifications for the separation and sorting of the feed material are achieved. For the comminution of WEEE, the machi-
nes must meet specific requirements in respect of size reduction, insensitivity to solid components and flexibility for adapting to different feed materials. To liberate single components, composites must be broken up, but harmful components that are contaminated with pollutants should not, however, be destroyed completely. With the Rotorshredder RS and Rotor Impact Mill RPMV presented here, BHS Sonthofen supplies two machines to achieve the main objectives of WEEE processing ­ i.e. effective size reduction and gentle desintegration of composites to liberate the individual components. The achievement of these aims in combination with an extremely flexible and at the same time costeffi-
cient operation represents a leap in technology compared to conventional systems.

Published in: AUFBEREITUNGS TECHNIK - 47 (2006) Nr. 3
PDF (243 KB)
Mechanical Processes for Recycling Waste Electric and Electronic Equipment with the Rotorshredder and Rotor Impact Mill
47 (2006) Nr. 3
January 2006

Size: 243 KB

Mixing special concretes

BFT INTERNATIONAL

As a result of recent new developments throughout the concrete industry over the past years, the re-quirements placed on the concrete production process, as well as the complexity of the mixing tasks, have considerably increased. This situation confronts suppliers of mixing machines with the tasks of systematically acquiring new knowledge on the operation and the functioning of their machines, and of developing suitable solutions for the challenges that arise.

Published in: BFT INTERNATIONAL - 12/2005
PDF (171 KB)
Mixing special concretes
12/2005
December 2005

Size: 171 KB

Using a rotor impact mill for grinding burnt lime

ZKG INTERNATIONAL

The intention was to rationalize the primary comminution of burnt lime in the 0√120 mm particle size range in a German lime and cement plant.This had previously been carried out with an impact mill, and the specific aims were to increase the comminution effect and reduce the machine running time. BHS-Sonthofen decided to use an RPM 1113 rotor impact mill for this purpose.The BHS RPM 1113 rotor impact mill, fitted with a 110 kW motor, is capable of comminuting 25 t/h burnt lime of particle size 0√120 mm. This produces approximately one third 0√0.09 mm fine lime and two thirds 0.09√2 mm.
The throughput capacity and size reduction ratio achieved with this machine are significantly higher than the previous values achieved with the impact mill.This means a saving in machine running hours, i.e. in energy and wear costs.

Published in: ZKG INTERNATIONAL - 11-2005
PDF (371 KB)
Using a rotor impact mill for grinding burnt lime
11-2005
November 2005

Size: 371 KB

Evaluation of a Continuous-Indexing Vacuum Belt Filter As a Replacement for Filter Presses For the Manufacture of a High-Value Specialty Chemical Product

BHS-Filtration Inc.

The BHS Continuous-Indexing Vacuum Belt Filter (CI-VBF) with 12 m² of filter area replaced a 440 m² filter press. The CI-VBF provided improved washing efficency for a higher quality product, and lower operating and lower maintenance costs with a fully automated operation. Solid-liquid separation can be accomplished by pressure or vacuum filtration in a batch or continuous mode. Generally, following filtration, the cake must be washed and subsequently dried. The choice of technology depends upon a wide range of parameters of the solids (i.e. crystal size and distribution, type and shape), liquids (type, temperature, and viscosity) and the process itself. This article discusses the evaluation and installation of the BHS Continuous-Indexing Vacuum Belt Filter (CI-VBF) as a replacement for manually operated filter presses.

Published in: BHS-Filtration Inc. - Report Number 030304-101654
PDF (528 KB)
Evaluation of a Continuous-Indexing Vacuum Belt Filter As a Replacement for Filter Presses For the Manufacture of a High-Value Specialty Chemical Product
Report Number 030304-101654
August 2005

Size: 528 KB

A Six Sigma Approach to Evaluating Vacuum Filtration Technologies

Chemical Engineering Progress (CEP)

The appropriate testing procedures help direct the selection of vacuum filtration equipment and ensure optimum equipment operation.

Published in: Chemical Engineering Progress (CEP) - August 2005
PDF (185 KB)
A Six Sigma Approach to Evaluating Vacuum Filtration Technologies
August 2005
August 2005

Size: 185 KB

Clean-in-place operations for thin-cake filtration technologies

PharmaChem

This article discusses the choice of thin-cake (2-25 mm) separation technologies and their benefits to optimizing the effectiveness of the production process. The paper continues with a discussion of clean-in-place operations to meet current Good Manufacturing Practices (cGMP) guidelines including riboflavin test and validations. ANSI/ISA S88 (and IEC 61512-1 in the international arena) batch process control system standards are also examined. Finally, factory and site acceptance testing is described.

Published in: PharmaChem - May 2005
PDF (328 KB)
Clean-in-place operations for thin-cake filtration technologies
May 2005
May 2005

Size: 328 KB

What Twin-Shaft Mixing can do for you

Everyone has a general idea what mixing means. But describing this is not so easy. The goal of any mixing process is to distribute materials with different characteristics, and usually in differing quan-tities, as evenly as possible. A new homogeneous material with different properties results.

Published in: The Concrete Producer - October 2004
PDF (1.2 MB)
What Twin-Shaft Mixing can do for you
October 2004
October 2004

Size: 1.2 MB
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