Cement Energy and Environment

I • )...,. reagents will form additional NOx whereas at lower temperatures the reactions proceed slowly and substantial amounts of unreacted ammonia will escape. Ammonia and Urea Dissociation and Reduction Pathways have been shown in the Figure 1. The performance of SNCR system depends on -Residence time available at optimum temperature. • Degree of mixing between injected reagent and combustion gases • Uncontrolled NOx concentration and oxygen level. • Molar ratio of injected reagent to uncontrolled NOx. The performance also depends on the efficiency of installed injection system. ERC Chemtrol is one of the leading De-NOx system suppliers and claims a very high efficiency of their system. SNCR system can easily be installed in pyro system and should be installed after taking primary reduction measures. This can reduce NOx up to 80 per cent. Authored by Jayanta Saha, Cement Process Consultant (Freelancer) based in Navi Mumbai. Courtesy: Indian Cement Review (online), April2016 KIRAN GLOBAL LAUNCHES GREEN CEMENT Kiran Global Chems Ltd, a part of M S Jain Group, has launched an environment-friendly cement, branded Geocement, using patented technology. The company claims that using the product will help save water, reduce emission of carbon dioxide and cut down on construction time as well. The company is planning to invest around Rs 200 crore to set up manufacturing facilties for this green cement and will have 12 geobinder and geopowder plants, two precast concrete units and four grinding plants at Vizag in Andhra Pradesh, Hospet in Karnataka and Tuticorin and Chennai in Tamil Nadu. The plants will produce four million tonnes of green concrete mix a year during the next three years. The investment would be made partly from internal accruals and mostly from institutional borrowings. The green cement business would bring in around Rs 2,000 crore for the company by 2018-19. Besides, various cement manufacturers are approaching Kiran Global for technological tie– ups in order to add the green cement to their portfolios, company officials said. Geopowder, a cement powder that could be used in construction , has to be mixed with Geobinder, a solution that works with the powder to complete the characteristics of the geocement. The company also offers Geocrete, a brand of concrete that includes the other components of the mortar, which could be directly used in concrete and construction. The Geocement binder has been developed by the company through research and has been patented. The company claims that Geocement does not require water curing , attains maximum strength within seven hours and has a high life cycle. It uses fly ash, slag and silica, which come out as industrial waste from other industries. Geocement also reduces carbon dioxide emission, which is a major issue with the conventional cement industry. 'We have started distributing this to the bulk customers, such as builders and now we are launching the brand for retail. We are planning to sell it through e-commerce," said M S Jain, chairman, Kiran Global Chems Ltd. However, the company has to work out the model for small quantity sales through e-commerce, as it has to look at the logistics solutions to reach the customer. He added that the company has entered into an agreement with Australia based firm Wagner to offer its products to the Australian company for its projects in India. Wagner has been using eco– friendly cement for construction, and has also developed an Airport using similar technology. Kiran would offer the binder, which is a unique product in the segment. India is the second largest manufacturer of cement and the industry emits 300 million tonnes of carbon dioxide, he said. Geocement can reduce emissions by up to 80 per cent, he added. However, the company would be focusing on selling the products to those engaged in environment-friendly construction. With about 10- 12 per cent of the buldings rated as Green, the 41