Selective comminution of concrete waste and recovery of the concrete constituents in a grinding-drying process

Using a Loesche VRM, trials were carried out in order to determine the extent to which the constituents of concrete waste could be made suitable by a special recycling process for use as a substitute for the natural rock fraction in components. In this process, the employment of suitable separation equipment played a crucial role.

1 Summary

This article describes a new process for the separate recovery of the components of concrete waste by means of selective comminution in combination with dry separation by density. The process is based on a Loesche roller mill, which liberates the gravel and sand fractions in a non-destructive manner. Post-separation of the coarse fraction using an air jigging machine or dry fluidized bed separation ultimately produces a recyclate of such a good quality that it can be used to completely replace the natural rock fraction. Pilot results of the selective comminution are presented and it...

Related articles:

Issue 2018-10 LOESCHE GMBH

LafargeHolcim once again relies on Loesche vertical roller mill

Lafarge Africa Plc, group member of LafargeHolcim, is erecting a new coal grinding plant in its Nigerian factory, Ewekoro, and has once again chosen a Loesche mill. Until now, this cement plant in...

Issue 2016-5 LOESCHE GMBH

Yoo Gyeong CM Co. Ltd. awarded first contract to Loesche

The Korean customer awarded the first project to Loesche GmbH for its KyungNam terminal. To grind the granulated blast furnace slag, the customer will use an LM 41.2+2 CS type Loesche mill with a...

Issue 2016-3 LOESCHE GMBH

Clinker grinding in Indonesia with the tried and tested Loesche mill type LM 53.3+3 CS

For the PT Semen Baturaja cement plant, the customer Tianjin Cement Industry Design & Research Institute Co., Ltd. has placed an order for two type LM 53.3+3 CS Loesche mills for clinker grinding....

Issue 2013-12

First VRM for cement grinding at Göltas cimento

To increase the cement grinding capacity at its plant in Isparta, the Turkish Göltas Cimento A.S. has ordered a Loesche vertical roller mill of the type LM 56.3+3. Göltas is operating two clinker...

Issue 2013-7-8

Loesche delivers VRM for Dumai Clinker

For the new grinding terminal “Dumai Clinker” located on the coast east of Sumatra, the Indonesian PT. Semen Padang has as a long-time customer once again decided for a vertical roller mill from...