Cement, Energy and Environment

with a view to building a 10,000 tpd cement production line. Launched in early 2000, the project was divided into two phases to match the development of the accompa n yin g infrastructure and the growth in demand for cement. The firs t phase comprises a complete production line with a guaranteed throughput of 5,000 tpd, a lthough the machinery is des igned to handle 6,000 tpd. Kiln, kiln hood and cooler have been dimens ioned from the s tart for the eventual daily throughput of 12, 000 tonnes. F. L. Smith and L&T have together supplied equipment for a11 sections of the plant. Phase two is duplica te of phase one and mirrors it so that the two preheater towers are located side by side, feeding the same kiln. Each prehea ter systemwill have two s trings with an SLC calciner, and the two systems together will have 24 cyclones and two 6x17 metre calciners once the whole project is finished. The second phase was planned to start up two years a fter first flame at phase one. Courtesy: Highlights Apr. 2002, P 14, Fnx: +4536301820 I:- mnil: info@flsmidth.com Web: www. flsmidth. com THE EFFECTS OF THE ALKALI CHLORIDE CIRCULATION ON THE FORMATION OF THE KILN RINGS 13. Omur SENSOZ Ve Selcuk YALCIN In this study the effect of rings and their formation kinetics are investigated. For this purpose, the samples from raw materials, cyc lones a nd ri ng formati on were take n consequ tively to analyses. It was observed that, the alkali oxides and the chloride concentrations were getting higher in the raw materials from the beginning to end of the cyclones. Increases were about 1.65 times for Na 2 o, 3.1 times for ~0 and 20 times for chloride concentrati ons. It wa s also found that, the ring formations at sinter zon e were containing spurrit minerals Ca 5 (Si0 4 ) 2 CO~, free calcium oxi d e, calcium carbonate, some silicates, and high chloride after analysing it by x-ray diffractometer. At the end of this s tudy it was agreed tha t the most important cause for the r ing formation was transportation of liquid cells of the a lkali chlorides to the sinter zone. Courtesy: Cement nnd Concrete World, Cimento vc-Bcton DUNYA S f, ]nn. Feb.2002, Pp. 32-40. Fnx: (90312) 287 9272 Email: info@tcmn.org.tr Web: www.tcma.org.tr PRODUCTION PROCESS OF HIGH VOLUME MINERAL ADDITIVE ECO- CEMENT: PART I BACKGROUND RESEARCH Konstan tin Sobolev, Europenn University of Lcfkc, Civil Engineering DepMtment, Lc_•fke, TRNC Mctin Arikiln, Middle East Technicnl University, Civil Engineering Dep<~rtment, AnkMa- Turkey. This paper presents a new approach to the production of High Volume Mineral Additive (HYMA) cement. HVMA cement technology is based on the intergrinding of portland cement clinker, gyps um, minera l add itives, a nd a special complex admixture, Supe rsilica. This new method increases the compressive strength of ordinary cement to 140 MPa and also permits the utilization of a high volume (up to 60°/.,) of inexpensive indigenous mineral additives in the cement. The research results demonstrate that a high volume of natural matnials (a lumosilicates, limeston e, sand, n a tural pozzolans) and industrial by-products (granulated blast furnace slag, fly ash) and waste (chemical wastes, broken glass and ceramic) can be u sed as mine ral