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We Try to address the big problem of cement manufacturing sector it is CO2 emissions How to control techniques and measures that are available to mitigate greenhouse gas (GHG) emissions from the cement manufacturing sector at this time. In general, emissions of CO2 from the cement manufacturing sector can be reduced by: • Improving the energy efficiency of the process, • Shifting to a more energy efficient process (e.g. from wet and long dry to preheater/precalciner process), • Replacing high carbon fuels with low carbon fuels, • Applying lower clinker/cement ratio • Removing CO2 from the flue gases. A-   Energy Efficiency Improvements to Reduce GHG Emissions : 1- Raw Material Preparation (Transport System Efficiency Improvements - Raw Meal Blending - High Efficiency Classifiers- Fuel Preparation) 2- Clinker Production (Process Control and Management Systems - Replacement of Kiln Seals - Kiln Combustion System Improvements - Use of Fluxes and Mineralizers

Vertical roller mills (VRMs) are vital pieces of equipment in cement plants and are popular in new installations due to their high efficiency. However, technical issues with VRMs can be tricky to solve and may cause them to act as process bottlenecks. ASEC is well positioned through its experience in Africa to comment on the possible sources of problems with VRMs? What are the sources of vibrations and how can we improve VRM lifespans? Firstly, as a rule, the root cause of vibrations in VRMs is always imbalanced forces and/or tension between the rollers and table. The causes of vibrations fit into four main categories: A - Mechanical aspects 1. Check that the tightness of all screws for the roller jack (tensioning system) and drive units for the motor and gearbox are as stated by the manufacturer; 2. Control the height of dam ring (up or down) with respect to the main motor current; 3. Ensure suitable substrates and water injection control; 4. Check that

لسورة الكهف فضائل كثيرة وقد ورد في فضلها أحاديث منها : * - قال رسول الله صلى الله عليه وسلم " من قرأ العشر الأواخر من سورة الكهف عصم من فتنة الدجال " .  * - قال رسول الله صلى الله عليه وسلم " من قرأ الكهف يوم الجمعة فهو معصوم إلى ثمانية أيام من كل فتنة تكون، فإن خرج الدجال عصم منه "  * - قال رسول الله صلى الله عليه وسلم " من قرأ سورة الكهف كانت له نورا من مقامه إلى مكة، ومن قرأ عشر آيات من آخرها ثم خرج الدجال لم يضره "  وأخرج الحاكم وصححه من حديث أبي سعيد أن النبي صلى الله عليه وسلم قال " من قرأ سورة الكهف في يوم الجمعة أضاء له من النور ما بين الجمعتين "  * - قال رسول الله صلى الله عليه وسلم " من قرأ سورة الكهف في يوم الجمعة سطع له نور من تحت قدمه إلى عنان السماء يضيء له يوم القيامة، وغفر له ما بين الجمعتين "  * - قال رسول الله صلى الله عليه وسلم " ألا أخبركم بسورة ملأ عظمتها ما بين السماء والأرض ولكاتبها من الأجر مثل ذلك ومن قرأها يوم الجمعة غفر له ما بينه وبين الجمعة الأخرى وزيادة ثلاثة أيام ومن قرأ الخمس الأو