Cement Energy and Environment

market potential is above 3,000,000 tonnes per anum, said company officials. Currently, 120 TPD of geobinder ancl 200 TPD of Geopowder are manufactured in Ch1:Jnnai and an 800 TPD precast concrete plant is being installed in the city, he said. The products will be marketed in the southern states initially in 2016 with plans of exporting the binder to other countries. The company has plans to introduce Geocrete in 25 kg packing for instant concrete and road repairs. The product is priced at Rs 140 for a 35-kg pack of Geocement and Rs 225 for a 15··kg can of binder, which is costlier than ordinary cement. However, the prices would come down if bought in bulk, due to reduction in packing costs. While the brick-to-brick cost would be 10-15 per cent higher compared to the ordinary cement, the finished building cost would be lower by 10 per cent and turnaround time would be 50 per cent faster, the officials said. The Rs 600 crore company, which is a major manufacturer of Sodium Silicate, which is an ingredient in the green cement, with 33 plants at present, and with presence in five countries -– India, South Africa, Egypt, UAE and Qatar. It is also setting up facilities in Saudi Arabia and Malaysia. Courtesy: Business Standard, 21 .01.2016, from internet Tee nology Upgradation Process & Operations NEW CRUSHER MODELS ENHANCE PROCESS DESIGN FLEXIBILITY Manufacturers continue to make it easier to select the right combination ofcost, capacity and power to satisfy any set ofcrusher-circuit criteria By Russell A. Carter, Managing Editor Modern mine-duty crushers generally do their jobs amazingly well. In fact, it's possible that their broad versati lity and effectiveness can sometimes mask deficiencies in upstream or downstream processes such as drilling and blasting during the mining sequence, or pebble handling from SAG mill grinding, respectively. This isn't the fault of the crusher itself or the companies that build these highly efficient machines. Crushers, when properly sized for the application and well maintained, can handle most-if not all~f the material dumped into them with very little outside assistance. It's up to mine management and technical staff to dec de what goes in them and what comes out in order to achieve optimal process performance. Several speakers at a recent m1n1ng conference touched upon the real possibility that when it comes to optimizing mine-to-mill product flow, a simple shift in focus may produce significant improvements in overall cost control and asset utilization- and as an added benefit, crusher availability and efficiency might be improved even more. For example, one speaker offered the example of a mine manager focused solely on "getting tons to the crusher." Optimal fragmentation size from drilling and blasting isn't a primary consideration, as in: 'We have this gigantic gyratory crusher. It can handle pretty much anything. Why worry about fragmentation?" The actual issues related to poor fragmentation, the expert noted, aren't primarily associated with the crusher; they take the form of loading and haulage inefficiency, high secondary blasting costs and accelerated equipment wear and failure, to name a few. Looking further downstream, another speaker suggested that a mill might expend a lot of energy and money on crushing and re-handling those troublesome, grind-resistant pebbles that come out of the SAG mill-and which may not contain enough metal to make their treatment a significant contributor to overall recovery rates. And yet another pointed to site-specific quirks of mineralogy that can lead to unnecessary crushing and re-handling. At one mine, a study found that fines accounted for a surprisingly large portion of available metal content, with larger fragments being much lower in value. By taking advantage of the natural segregation of material in the ore stockpile-with fines remaining at the top while larger fragments worked their way to the bottom- the mine could harvest the top 20% of the pile and maintain recovery rates, while the larger fragments could be crushed and handled on a more selective and cost-effective basis. 42 •