Many heartfelt thanks for their support. Many thanks go to the management and the rest of the staff at United Cement Company of Nigeria Ltd for This report summarizes the author’s real-life experiences in a working environment with real operational structures that he went through at United Cement Company of Nigeria Ltd. The duration of the attachment was three months, which were spent in the Mechanical Engineering department which is made up of: 1. Raw mill section 2. Kiln section 3. Cement mill section 4. Parking Plant Data was gathered through carrying out specific tasks, sharing ideas and observation. The main goal behind this report is to give the conceptual view of the department and how it fits in the overall performance of the firm.
Their product is sold in 50kg bags and in bulk quantities. UniCem cement is characterized by its high tensile strength and rapid setting properties and complies with the NIS 444-1:2003 standard. UniCem manufactures Ordinary Portland Cement (OPC), CEM 1 for use in general construction and building purposes. 1. 3How Cement is produced Cement manufacturing is the basic processing of selected and prepared mineral raw materials to produce the synthetic mineral mixture (clinker) that can be ground to a powder having the specific chemical composition and physical properties of cement.
Mining Cement manufacture, like many other manufacturing processes, begins at the mine, where the raw materials like limestone, silica, aluminates, feric minerals and others are obtained. The general mining methods are surface mining. There are a few underground limestone mines, but most are pits on the surface. Cement plants are typically located central to the minerals required to make the cement, which saves the transportation costs and reduces the price of the cement. Crusher
The Essay on The Information Age Is Upon Us The Raw Materials Are
The information age is upon us. The raw materials are ones and zeros. The technology used to transport the ones and zeros provides numerous opportunities for entrepreneurs, scientists, and engineers. Telecommunications is dynamically changing the way we work, learn, communicate, and view society. At no other time in history have so many people been given the ability to exchange ideas, sell their ...
Once the ore material to be used for cement has been mined, it is transported to the crushing/screening plant, where it is crushed and screened, to produce the desired particle size. The ground powder is then blended, using the “Chemist’s Secret Mixture” which can be a closely guarded “recipe”. Atox/raw Mill An extremely compact, air swept vertical roller mill. The raw materials are milled to produce meal for the kiln. Kiln Consist of a rotary furnace positioned at an angle fabricated with steel plate and lined with firebricks which usually consist of 3 roller stations.
The rotation of the kiln causes material to gradually move downhill to the cooler end of the kiln. materials are then transported to the rotary kiln through several stages of cyclones (preheaters) for heat processing by contact with the hot gases from combustion of the kiln fuel. In the rotary kiln, first the carbon dioxide is driven off of the calcium carbonates, then the raw material is fused at a temperature somewhere around 2,700 degrees F. The discharge from the kiln is called clinker. Fig. 1. General layout of a rotary kiln
Cooler The clinker is then deposited in to the cooler where most of the heat is recover and clinker is cooled, crushed and sent by means of pan conveyors to the clinker silo. Ball mill/Cement mill A ball mill is a horizontal cylinder partly filled with steel balls (or occasionally other shapes) that rotates on its axis, imparting a tumbling and cascading action to the balls. Material fed through the mill is crushed by impact and ground by attrition between the balls and sent to the cement silo of the packing plant. The parking Plant
Extracts cement from the cement silo by conveyors and elevators, passes them through a vibrating screen, and then the rotary parker fills the cement in to bags and on to trucks which are then ready for shipping to consumers as Portland Cement. Fig. 2. Bagged Portland cement 1. 4Health and safety Unicem has a full service Occupational Health and Safety department. Health and Safety in the workplace is a major priority. The Company provides compulsory PPE (helmet, safety glasses, safety footwear and high visibility clothing) and site specific PPE for all her staff which they must use at all times or face penalties.
The Essay on Portland Cement Raw Material
PORTLAND CEMENT Chemical composition. Portland Cement is made up of four main compounds: tri calcium silicate (3 CaOSiO 2), di calcium silicate (2 CaOSiO 2), tri calcium aluminate (3 Coal 2 O 3), and a tetra-calcium (4 CaO Al 2 O 3 Fe 2 O 3). In an abbreviated notation differing from the normal atomic symbols, these compounds are designated as C 3 S, C 2 S, C 3 A, and C 4 AF, where C stands for ...
Safety induction is always given to new staff, contractors and visitors and safety talks held every 2 weeks to ensure in-house safety practices 1. 5Expectations and industrial reality ?Expectations As a student I was expecting to be taken as just a student who would contribute insignificantly to the organisation. Furthermore, I thought, though I was just a student my contributions would be needed in some situations. I expected to apply the rich theoretical approach I had acquired for two years in the university with the knowledge from different modules. ?Expectations versus reality
The working environment was a bit hostile (high temperatures at the kiln area and dusty environment at the parking plant) but colleagues in the department were willing to help any time i had a question on some procedures. The supervisor was so helpful to the extent of making sure my welfare at home was superb. Besides that, the team helped me to realize that i was an important figure who was able to contribute something significant to the organisation. The supervisor would sometimes leave me to accomplish certain tasks without the aid of anyone. Chapter Two Work related learning assignments
This chapter highlights the relevant departments to which the student was assigned. It provides a brief description of the assignments performed and their relevance to the degree programme. Unicem Mechanical Engineering department is comprised essentially of the repairs, maintenance and fabrication. As part of the orientation process, attachment students are given a safety induction and then taken on a tour of the company’s divisions. 2. 1 Mechanical Engineering department There are four sections in the mechanical department, which are raw mill, kiln, cement mill and parking plant.
The Essay on Fire Safety 2
On a cold summers night the fire department received a two-alarm house fire. When the first-in engine arrived on the scene they reported heavy smoke and flames visible from the exterior. Others units then arrived on the scene to help battle the blaze that destroyed the two-story house. Thankfully, no one was injured. Fire investigators determined the cause of the blaze was a candle that has been ...
Raw mill The raw mill engineers and technicians are incharge of repairs, maintenance and fabrication of new parts and machines in use within the raw mill consisting of the belt conveyors, atox mill, chain scrapper, apron feeders etc. Kiln section The kiln engineers and technicians are responsible for repairs, maintenance and fabrication of new parts and machines in use within the kiln section consisting of the pan conveyors, gas conditioning towers, kiln support stations, kiln, coolers, cyclones, airlifts and air slides etc. Cement mill
