steinexpo 2023

Highlights at steinexpo 2023 including follow-up reports

Issue 04/2009

Mineral Sample Reference Material Production in the Center for Mineral Technology – CETEM

1. Introduction Nearly every decision-making process in mineral research or industry depends on analytical data. Certified reference materials (CRMs) play an important role in accuracy, traceability...

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Issue 04/2009

On demand control of reagent dosage for hard coal flotation

1. Introduction The beneficiation of the finest fraction is the most expensive process step in hard coal preparation. Herein the froth flotation is an integrated part which influences the operating...

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Issue 03/2009

New sieve tensioning system

In today’s research or control labs, sieving analysis must be conducted and documented much more accurately and reproducibly than in the past. ISO 9001, laboratory certification, EC safety...

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Issue 03/2009

Prevention instead of emission

Screening machines, trough conveyors, chutes and other plant parts have always been the main sources of noise and dust in mining and mineral processing. According to an investigation carried out in...

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Issue 03/2009

Change of conveyor belt at the Prosper-Haniel mine

At the end of 2008, after eight years in darkness, a huge monster was wriggling back to the surface bit by bit: the conveyor belt from the inclined shaft of the Prosper-Haniel mine. There the giant of...

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Issue 03/2009

Solvent extraction of cobalt at a glance

1. Introduction Cobalt is one of the metals of high economic and strategic importance, largely because of its wide range of applications and dwindling supplies. Several hydrometallurgical processes...

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Issue 03/2009

Trouble-free storage, pneumatic conveyance and metering of hygroscopic bulk products, example: urea

1. Introduction Urea, due to its extremely pronounced capacity to absorb and fix water, is classified as highly hygroscopic. The product is an important nitrogen fertilizer, and is also used...

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Issue 03/2009

Design of Heavy-Duty Idlers for the Upper Run of Belt Conveyors Part II: Engineering Design of Idlers

1. Introduction Idlers play a key role in the cost-efficient operation of belt conveyors. The stresses on the idler in heavy-duty belt conveyors present a particular challenge with regard to idler...

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Issue 1-2/2009

Reduction of Magnetic Discoloring Mineral Impurities from Kaolin Clay Using High Intensity and High Gradient Magnetic Separators

1. Introduction Kaolinite occurs in sub-µm size and white in colour and its chemical composition varies from 46.54 % SiO2 and 39.50 % Al2O3 with 13.96 % H2O. The kaolinite samples are known as...

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Issue 1-2/2009

Simultaneous Improvement in Solid-Liquid Separation and Dissolved Ion Removal from Radioactive Effluents by Polymeric Flocculation

1. Introduction A wide range of liquid wastes are produced in nuclear industries and in all user industries of radioactive materials. The liquid radio- active wastes generated at nuclear power plants...

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