Cement News tagged under: Alternative Fuels

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Aluminium and iron in clinker

06 February 2019, Published under Cement News

Aluminium and iron are two of the key components in Portland cement clinker. Varying their presence in clinker can have significant effects on the final clinker. Arthur Harrisson looks at some of the impacts of such variations. Figure 1: light grey aluminate and white ferrite very slowly cooled. The hexagonal blue alite crystal below centre is 30µm across The four essential constituents of Portland cement clinker are usually listed as: • calcium oxide (CaO or, in cement chemi...

Cementos Alfa plans doubling biomass use

04 February 2019, Published under Cement News

Cementos Alfa, part of the Portland Valderrivas Group, has avoided the emission of 31,000t of CO 2 at its Mataporquera plant, Cantabria, in 2018 as a result of the use of 150tpd biomass as alternative fuel. Moreover, the use of the fuel, through improved energy efficiency, is enabling the company to remain competitive. In 2019 it plans to double the amount of biomass and therefore, has applied to the Spain’s General Directorate for the Environment to extend the authorisation. Output at t...

FLSmidth to install HOTDISC at Golden Bay cement plant

29 January 2019, Published under Cement News

FLSmdith has won an order from Fletcher Building to install a HOTDISC® combustion device at its Golden Bay cement plant in New Zealand. Local media reported that substituting rubber biofuels for coal will reduce CO 2 emissions by 13,000 tonnes per year, or the equivalent of emissions from 6000 cars. Once the FLSmidth HOTDISC is fully operational, the kiln will consume up to 3.1m shredded tyres a year, replacing the need for over 15,000t of coal. New Zealand’s Associate Minister for th...

Finding a different kind of gold

14 January 2019, Published under Cement News

While coal had been the mainstay of PPC’s energy sources for decades, the company’s current energy policy has called for a steady replacement of the black gold with more sustainable energy sources. This provided the South African cement producer with the drive to introduce alternative fuels at its De Hoek plant in Western Cape. By PPC, South Africa. PPC’s energy policy seeks to replace increasing volumes of coal with alternative fuels Sustainability needs innovative thinking and...

Reducing cadmium volatility

19 December 2018, Published under Cement News

A recent news report for the Journal of Engineering described some experimental work that has been carried out in China designed to investigate the behaviour of some heavy metals, especially cadmium, in cement clinker. In particular the work looked at the influence of chalcogens on the volatility of cadmium. The content of cadmium in alternative fuels may be higher than in fossil fuels Chalcogens are a group of elements also known as the oxygen family. It consists of the element...

Ohorongo Cement plans for alternative fuel boost in festive period

19 December 2018, Published under Cement News

Ohorongo Cement and Rent-A-Drum have made a seasonal pledge to set up waste disposal sites in Thomas, Erongo and Oshana regions of Namibia to reduce the amount of festive waste going to landfill. The cement company wants to process the gift wrapping paper and packaging from the festive period to supplement its alternative fuels. “Since the beginning of the year, Ohorongo disposed of over 70 truckloads of non-recyclable material as alternative fuels along with wood chips and charcoal fines i...

Andusia moves into hazardous waste market

12 December 2018, Published under Cement News

Andusia Recovered Fuels Ltd is moving into the hazardous waste market in addition to the RDF market which they participated in for the past six-and-a-half years. Moving into the hazardous waste market means Andusia can now offer an extensive RDF, SRF and hazardous waste solution. The future of the export of waste has also come under question due to Brexit. However, as Director Mark Terrell comments: "No matter what the outcome of Brexit, we don't foresee any change to the business or how...

Carbon-neutral fuel launched at COP24

06 December 2018, Published under Cement News

NextFuel, a new carbon-neutral fuel that is made from elephant grass has been unveiled at the United Nation's COP24 climate summit in Poland. The fuel can be burnt at industrial facilities such as cement plants to replace fossil fuels and requires no infrastructure upgrades. Manufactured by Sweden-based NextFuel, the product of the same name is made by drying elephant grass and processing it in a sealed rotary drum where oxygen is removed before the material is densified and pressed in briq...

Lehigh Northeast Cement proposes alternative fuel from paper mills

30 November 2018, Published under Cement News

Lehigh Northeast Cement Co has submitted an application to the New York State Department of Environmental Conservation to modify its air emissions permit for its Glen Falls (NY) plant to allow the company to use an engineered fuel product from recycled paper mills as part of its fuel mix. The fuel, known as ‘raggertail,’ consists of 60 per cent plastic trimmings and 40 per cent paper and cardboard fibre, Lehigh Hanson reports. It meets the DEC’s criteria for use as an AF and is expected to...

Achieving AF and NOx goals

27 November 2018, Published under Cement News

With reducing fuel costs and sustainability in mind, Brazilian producer Cimento Nacional is persistently striving to implement innovative methods to increase alternative fuels (AF) utilisation while reducing emissions. With the help of an advanced MI-CFD modelling technique the company has successfully achieved this goal at its Sete Lagoas plant, increasing its AF thermal substitution rate and reducing NO x emissions. By Ablail Paula Pinheiro, Joana Bretz de Souza, Cinar Brasil, Brazil, Tah...