Treatment of bypass dust in cement manufacturing

Indexing belt filters from BHS-Sonthofen enable the bypass dust accruing during clinker manufacturing to be completely reincorporated into the process by using up to 100 % of more cost-effective alternative fuels in cement kilns. Reincorporation of the salvaged bypass dust increases cement production by up to 3 %. Proof is provided by a new plant having a 20 000 t annual capacity that the method works reliably on a commercial scale.

1 Introduction

Fuels such as coal, oil or gas used to manufacture cement are increasingly being replaced by clearly more cost-effective alternative fuels such as car tires, plastics, sludge and municipal and industrial waste. The percentage in Europe has already increased to around 60 % and will rise even further in the years to come.

More chlorides are released in the combustion process, however, when using alternative fuels, in comparison to fossil fuels. These chloride salts evaporate in the sintering zone, which result in the formation of internal circuits (gas recirculation). The subsequent...

Related articles:

Issue 11/2015 HOLCIM/A TEC

A green building in a grey cement plant – transforming bypass dust into industrial salt with the ReduDust Process

1 Introduction To reduce its consumption of traditional fuels, like coal, oil or gas, the cement industry is increasingly using solid recovered fuel (SRF). SRF, produced in specialized installations...


Smart box: The DustScrape dust filter

In closed transfers systems to conveyor belts of cement works, particularly high pressure can develop and, despite effective side sealing at the chutes, there can be a lot of dust. The solution: the...

Issue 5/2016 LEIBLEIN GMBH

Vacuum belt filters, all-rounders for filtration and dewatering

Using a Leiblein vacuum belt filter for recycling wash/process water offers the advantage that pure mechanical cleaning often involves no chemical change in the medium. Compared to a hydrostatic...

Issue 11/2017 WO 2017/097850 A1

Processing of bypass dust

(22) 07.12.2016 (43) 15.06.2017 (57) The invention relates to a method for processing a hot gas stream charged with dust particles and containing salt, in particular containing chloride, wherein said...

Issue 4/2023 KR102513542 (B1)

Chlorine bypass dust recycling system for reproducing chlorine bypass dust as cement raw material and recycling method using the same

(22) 01.12.2022 (43) 23.03.2023 (57) The present invention relates to a recycling system of chlorine bypass dust and a recycling method using the same. The recycling method of chlorine bypass dust of...