Cement News tagged under: Raw Materials
Loss on ignition28 September 2016, Published under Cement NewsThe loss on ignition of a raw material, cement or a clinker sample is the amount of weight lost through raising the temperature of the material to a predetermined level. As an indicator it can be used to monitor and improve the quality of the final product. Clinker stored outside in wet conditions will experience an increase in LOI Weight loss during heating can be due to the evaporation or volatilisation of a variety of components of the sample. Water is lost at 100-105˚C, orga... |
How do blending beds stack up?27 September 2016, Published under Cement NewsDr Clark tackles the science behind longitudinal blending beds for crushed raw materials. He discusses the part played by blending time, bed dimensions, volume, layering and stacker speed in the effectiveness of the blending bed. Blending beds smooth the variation in raw materials before they are ground in the raw mill to produce the kiln feed The vast majority of modern cement plants have some sort of blending bed for smoothing the variation in the raw materials before they are... |
It's all about the costs26 August 2016, Published under Cement NewsDr Clark considers the value of measuring and comparing the costs of making cement as the first step to optimising, ie minimising, those outlays as he discusses cost benchmarking and optimisation. Raw materials can be cheaper to extract with bulldozers The Technical Forum has covered many technical topics related to the production of cement over the years. However, we must always keep in mind that cement-making companies and factories must also be money-making operations to s... |
Know your raw materials22 August 2016, Published under Cement NewsStackers and reclaimers play a large part in achieving the reliability that helps deliver a constant supply of homogenised raw materials to the mills. The storage solution must cope with quarry operations and logistics, as well as different raw material parameters. To ensure the reliability of stackers and reclaimers and to optimise their total costs, accurate raw materials characterisation is essential. By FLSmidth, Denmark. At Holcim Brazil's Barroso plant, the clay excavator was in... |
India: government to relax mining lease transfer rules13 January 2016, Published under Cement NewsThe government of India plans to enact a law that will allow companies that received mining licences without having gone through the auction process to transfer these leases, local media have reported. The move that will make M&A deals easier in the steel, cement and metals sectors. For instance, this law would help close Birla Corp's purchase of two cement units in eastern India from LafargeHolcim which has reportedly hit a hurdle due to the existing mining regulations. The mines mini... |
Jaypee gets green nod to expand limestone mining in Andhra Pradesh04 January 2016, Published under Cement NewsJaypee Cement has received the green approval for expansion of limestone mining capacity from 3.47Mta to 6Mta in Andhra Pradesh, entailing an investment of INR950m (US14.3m). The company has commissioned a cement plant with 5Mta capacity and captive limestone mine of 3.47Mta to meet partial requirement of limestone of the cement plant at Budhawada village, in Krishna district. |
UltraTech Chhattisgarh mine plan hits hurdle24 December 2015, Published under Cement NewsThe government of the central Indian state of Chhattisgarh has cancelled a no objection certificate (NoC) to UltraTech Cement for a limestone mine in Raipur district. The state government on Tuesday announced it would cancel the certificate required by the cement producer to commission the operation. The mine is interlinked with the company’s integrated cement plant, located in the neighbouring Balodabazar district. The department had granted the conditional NoC on 5 January 2009. The 17... |
Gebr Pfeiffer wins another VRM order for Iraqi market28 August 2015, Published under Cement NewsSinoma (Suzhou) Construction Co has placed an order with Gebr Pfeiffer SE for the supply of an MPS 5000 B to be installed at the Saman cement works in Iraq. The mill featuring an installed drive power of 4000kW will grind ≥500tph of raw materials to a product fineness of ≤10 per cent residue on 80µm. The mill is slated for delivery in 2016. It will be the sixth mill of this type that Gebr Pfeiffer will supply to Iraq via the Chinese general gontractor. |
Brazil: alternative raw materials usage among 'best in the world'09 February 2015, Published under Cement NewsThe proportion of alternative raw materials used in Brazilian cement is one of the best in the world, country's leading cement producer reports, citing domestic construction industry association SNIC. “Brazil has one of the highest clinker substitution rates in the world and this is due to industry research and the development of technologies to incorporate natural substitutes and even steel industry dejects into cement manufacture”, says Edvaldo Rabelo, executive director of energy, sustai... |
Cameroon: first raw materials arrive at Dangote’s Douala plant14 January 2015, Published under Cement NewsDangote Cement has received the first cargoes of raw materials for its new cement works at Douala, Cameroon. The delivery consists of clinker, gypsum and pozzolan, produced in the 27ha quarry in Tombel, in the south-west of the country. Dangote has an exploitation agreement for five years for the location. Over the past two weeks, the company has been carrying out equipment tests in the new 1.5Mta plant, which represents an investment of XAF50bn (US$90m). |