Cement News tagged under: manufacturing technology
Improving ash quality01 February 2016, Published under Cement NewsAs governments consider the reduction of power generation in coal-fired power stations for environmental reasons, this article looks at the impact of this measure on the supply of fly ash to the cement industry. However, in the short- to medium term the availability of fly ash seems to be robust as sufficient stocks appear present, either in landfills or in fly ash lagoons. Coal-fired power stations have long supplied fly ash to cement plants as an addition to Portland cement As... |
Down to size27 January 2016, Published under Cement NewsPT Cemindo Gemilang, part of the Ganda group and relative newcomer to the cement business, has recently constructed a 10,000tpd integrated cement works on Java, Indonesia. The crushing plant for the new facility, supplied by HAZEMAG & EPR, has the capacity to handle 2500tph and benefits from a roller screen and impact crusher combination. By Daniela Ulbrich, Hazemag & EPR GmbH, Germany. Figure 1: layout of the primary crushing plant for PT Cemindo Gemilang’s cement works in Bayah, In... |
Optimisation big and small11 January 2016, Published under Cement NewsQuarry control and fleet management systems are often used by large mining operations but can also offer significant benefits to smaller quarries. Real-time data flow not only enables cement companies to optimise their quarry operations in terms of fleet movement but also other tasks, such as crushing and blasting. By Sylvio Riccó, Sodep, Brazil. Figure 1: automated fleet management systems such as Minetrack track equipment through the quarry map enabling an improved use of resourc... |
The modern cooler16 November 2015, Published under Cement NewsClinker cooling is a key step in the pyroprocessing system. The cooler is essential for recuperating heat from the clinker and cooling it sufficiently for the cement milling operation. However, the primary objective of the cooler is to transport hot clinker from the kiln. During this process, the cooler fulfills a range of functions and its design needs to take into account the requirement to transport clinker efficiently as well as help to recover waste heat and obtain the optimum clinker p... |
Cement grinding considered28 October 2015, Published under Cement NewsWhile grinding technology has advanced considerably over recent years, the right choice of mill and improved operation of mills are still key to grinding efficiency. While energy efficiency has become the driving force in grinding technology, Kline Consulting considers some of the other important factors when specifying grinding equipment. By John Kline & Charles Kline, Kline Consulting LLC, USA. Figure 1: different compression grinding technologies Today there are many choices ... |
Quarry efficiency30 September 2015, Published under Cement NewsThe quarry is often an undervalued and overlooked aspect of cement manufacture. However, the quarry is where it all begins as the quality of the cement starts here. With the right long-term plan in place, a number of steps can be taken to enhance quarrying efficiency, optimise operations and reduce costs. By John Kline & Charles Kline, Kline Consulting LLC, USA. Figure 1: checklists for quarry operators – years of reserves should always be known Before starting any quarry optimi... |
Monolithic linings23 September 2015, Published under Cement NewsCastable or monolithic linings made of fireclay with silicon carbide can offer significant benefits when used in certain, particularly-challenging parts of the cement plant pyroprocessing system. The harsh environment causes a faster rate of anchor embrittlement, alkali corrosion and build-ups. Teplotechna outlines the benefits. By Teplotechna DIS, Czech Republic. In April 2014, a new lining was installed in the riser duct of the Slantsy cement works in Russia Monolithic linings... |
Effects of age and type21 September 2015, Published under Cement NewsLimestone, a key element in the cement raw material mix, does not occur as a homogenous body of rock, but can vary widely in age and type across the world. These differences can have significant effects on cement production. Arthur Harrisson considers the effects of limestone age and type on the rock’s properties such as hardness, chemistry, grindability and burnability in various stages of the cement production process. Limestone deposits used for cement manufacture vary widely in ag... |
Improving process safety26 August 2015, Published under Cement NewsThe increasing use of alternative fuels is one example of where process safety is brought to the forefront at many cement plants, but hazards related to the storage and transportation of fuels, structural failures of fly ash silos/coal bins, explosion in kilns and coal mills, etc, underline the importance of process safety management. By K Ramesh Ramalingam, Prasad Ramchandra Rajadhyaksha and SV Jithesh, Chola MS Risk, India. Figure 1: key elements of process safety for a cement plant... |
VRM optimisation29 July 2015, Published under Cement NewsMost new cement plants utilise vertical roller mills (VRM) for raw material grinding and preparation. Taking a step-by-step look at the entire roller milling process, Kline Consulting recommends routine measurements and discusses ways to overcome chemical issues to optimise operations. A closer look at VRM efficiency and optimisation The vertical raw mill has several advantages over previously-used mill systems including: • lower power consumption • less part wear/consumption • ... |