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1. Nestlé Case Study Lauren and Florian 2. Mission“To provide consumers withthe best tasting, mostnutritious choices in a widerange of food and beveragecategories and eatingoccasions, from …Descripción completa
CHAPTER I INTRODUCTION PT Holcim Indonesia Cilacap plant produce portland cement. Cement production process consist of mining raw materials such as limestone, clay, iron sand, and silica sand. Followed prehomogenising and stock pilling process in stockpile area, grinding and drying in Rawmill, burning in Kiln and final milling in finish mill area. 1.1. Background There is combustion process in cement manufacture. Combustion process need high temperature to change phase material from solid phase to liquid phase. PT Holcim Indonesia tbk Cilacap plant using coal as fuel. Coal is used for combustion process in kiln and precalciner preheater. Raw coal is stored at stockpile and refined in the coal mill. Output from this process is fine coal. Fine coal is stored at coal bin. Fine coal must be transferred and weighed in pfister feeder before it is used for combustion process. Pfister Feeder is equipment used to weigh and feed fine coal from coal bin for burning process in calciner and kiln burner continuously according to the set point. There are three pfister feeder in PT Holcim Indonesia Cilacap Plant, pfister calciner ILC (452-PF1), pfister calciner SLC (452-PF2), pfister main burner kiln (482-PF1). Pfister feeder is gravimetric feed system which is means materials that passes pfister can be weighed accurately. Fine coal from bin enter pfister because force of gravity. Fine coal pass slide gate then transferred to pfister feeder rotor, in rotor fine coal weighed by loadcell, because of air blower and rotor rotation, fine coal distributed into outlet. Air from blower bring out fine coal from rotor chamber into outlet towards calciner or main burner.
Hydraulic Department in charge to pfister feeder maintenance. Maintenance does periodically. Maintenance for pfister feeder consist of greasing and shutdown maintenance (overhaul). 1.2. Problem Problem is situation when something didn’t work properly. For pfister feeder there are some problems ·
Pfister feeder stop during operation
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Kiln shutdown because of pfister feeder jammed
1.3. Boundary Problem In this script we would to discuss some specifiec issues, such as ·
