Processing of heavy contaminated raw gypsum using the HAVER Friction-Clean

Test Run

Processing of heavy contaminated raw gypsum using the HAVER Friction-Clean

Summary: HAVER ENGINEERING GmbH, of Freiberg, is a subsidiary of HAVER & BOECKER OHG. The company’s activities comprise machine and process development, and also ­machine/system auditing. New elements in its portfolio include custom-tailored specialist training courses in mineral processing and the operation of HAVER systems on the basis of Build – Operate – Transfer (BOT) models. The following article first appeared as a Paper pre­sented at the Comminution And Screening symposium at the Institute for Mineral Processing Machines of the TU Bergakademie Freiberg on 6 March 2015, and focuses on the HAVER Friction-Clean, a recently developed machine for removal of poorly soluble impurities. Initial experience in the processing of raw gypsum using the HAVER Friction-Clean pilot installation at Rump & Salzmann’s Dorste quarry is also reported.

1 Introduction

Approval processes for new and expanded quarries are extremely lengthy, complicated and costly. It is therefore in the quarry operator’s interests to exploit to the full his existing deposits, and to also process “inferior” grades. A further potential for extending the productive life of quarries can also be found in the excavation and preparation of spoil heaps, with the aim of routing the useable materials (“values”) which they contain for rational economic utilisation.

Rump & Salzmann operates a gypsum quarry in southern Lower Saxony, and has been applying this procedure...

Related articles:

Issue 03/2018

Cleaning process

Study and assessment of the stress parameters applied in the “HAVER Hydro-Clean” high-pressure cleaning system

1 Introduction The removal or reduction of unwanted components from mineral resources is an essential task in many sectors involving the processing of raw materials. The goal of this processing step...

Issue 03/2016

Haver & Boecker’s Hydro-Clean®

The Hydro-Clean® washing unit from Haver & Boecker effectively cleans deleterious material from aggregate, recycled and other minerals while reducing water consumption by as much as 75 % compared to...

Issue 03/2013


Modern Screening Technology with a Future Based on more than 125 years of experience in the manufacture of woven wire, Haver & Boecker has continuously developed screening technology. In addition to...

Issue 05/2009

Removing Metallic Coatings from Plastics and Metals by Mechanical Processing

1. Description of the Problem During the manufacture of technical products and at the end of their useful lifetime, waste is produced that often consists of or contains material composites. In...

Issue 06/2023 Responsible handling with resources

Mechanical soil washing processes and their importance for environmental protection

Soils play a crucial role in the environment. They serve as habitats for plants and animals, filter pollutants from water, and are important carbon stores. However, soils can become contaminated by...