1000 tons of  day cement production line
The EPC cement production line project includes services such as process design, equipment supply (including mechanical and electrical parts), civil engineering, installation and commissioning, trial operation, reaching production standards and final delivery. Mechanical equipment includes limestone crushing and transportation, clay crushing, raw coal crushing, raw coal and auxiliary raw material pre-homogenization storage yard, raw meal batching station, raw material grinding and waste gas treatment, raw meal homogenization storage, raw meal kiln, and firing kiln Tail, firing kiln and tertiary air duct, firing kiln head, clinker transportation, clinker storage and transportation, cement batching station and clinker bulk, gypsum, mixed material crushing and transportation, cement grinding and transportation, cement storage And transportation, cement packaging, bagged cement loading, cement truck bulk, machine repair workshop and total material warehouse and other parts.

product description
The Pengfei EPC cement production line project includes services such as process design, equipment supply (including mechanical and electrical parts), civil engineering, installation and commissioning, trial operation, reaching production standards and final delivery. Mechanical equipment includes limestone crushing and transportation, clay crushing, raw coal crushing, raw coal and auxiliary raw material pre-homogenization storage yard, raw meal batching station, raw material grinding and waste gas treatment, raw meal homogenization warehouse, raw meal kiln, and firing kiln Tail, firing kiln and tertiary air duct, firing kiln head, clinker transportation, clinker storage and transportation, cement batching station and clinker bulk, gypsum, mixed material crushing and transportation, cement grinding and transportation, cement storage And transportation, cement packaging, bagged cement loading, cement truck bulk, machine repair workshop and total material warehouse and other parts.
 
Process parameters
(1) Clinker output: ≥1000 t/d;
(2) Heat consumption of clinker firing
(3) Comprehensive power consumption of clinker
(4) Comprehensive electricity consumption of cement
(5) 28-day strength of clinker
(6) Dust emission concentration
production method
Cement production uses limestone and clay as the main raw materials, which are crushed and batched into raw materials, and then fed into the cement rotary kiln to calcinate mature materials, then add appropriate amount of gypsum to the clinker, add some mixed materials or admixtures, and pass the cement mill It is ground into cement, and then transported by packaging machine or bulk machine. Cement production equipment usually adopts dry cement production process. The raw material is dried and ground into raw meal powder at the same time, and then fed into the dry-process rotary kiln to calcinate the mature material. The main advantage of dry production is low heat consumption.
Process description
5.1 Limestone and gravel crushing
Limestone and sand are crushed by their respective crushers, and two crushers are located at the factory site.

5.2 Limestone multi-base collocation
The crushed limestone is transported to the entrance of the bucket elevator by a belt conveyor, and then transported to the multi-storage, the multi-storage is unloaded, and then transported to one or more storages. And it is conveyed by belt conveyor to the feed bin of raw material mill.

5.3 Storage and treatment of sand and gravel (iron ore)
The crushed sand and gravel are transported to the entrance of the bucket elevator by a belt conveyor, and then transported to the gravel storage, and then discharged from the bottom of the storage, and transported to the raw material mill feeding bin by the belt conveyor.

5.4 Clay storage and treatment
During the dry season, the clay is transported by truck from the clay quarry to the clay storage yard, and is piled up with bulldozers or loaders. The clay from the storage yard is taken out by a loader, and fed into a hopper and sent to the raw material mill feed bin by a belt conveyor. The clay silo is equipped with a movable bottom to prevent the material from encountering accumulation when unloading to the dosing machine.

5.5 Grinding and conveying of raw meal
The raw materials are extracted from their respective feeding bins (clay is a plate feeder) through a belt quantitative feeder, and are transported to the raw material mill system by a belt conveyor. The raw material mill is a circulatory air swept ball mill.

The raw meal products are transported into the batching warehouse through the air chute and bucket elevator.
The hot air from the preheater is used as the drying heat source for the raw material mill. When the rotary kiln is shut down or the hot gas of the preheater is insufficient, there is also a spare oil furnace.

5.6 Raw meal homogenization and feeding preheater
The raw meal is homogenized in the ingredient library to reach the desired density of the finished product. The homogenized raw meal from the batching warehouse is fed to the preheater through the kiln feeding system. The kiln feeding system is composed of a level box, a flow valve, a weighing gauge, an air conveying chute, and a bucket elevator.

5.7 Clinker calcination
The raw meal is heated and pre-decomposed in a 5-stage preheater/calcining furnace, and 90-95% is decomposed into the rotary kiln. The hot clinker from the kiln is cooled in a third-generation clinker cooler (or the latest). The cold clinker from the cooler is transported to the clinker warehouse (2 pieces) by a bucket elevator.
Part of the waste gas from the clinker cooler is used as the heat source for the coal/peat mill. Part of the waste gas from the grate cooler enters the kiln as the secondary air, part enters the calciner as the tertiary air, and the rest is air-to-air. The dust collected in the bag filter of the heat exchanger is discharged into the atmosphere, and the dust collected by the bag dust is sent to the clinker warehouse.

5.8 Kiln/raw mill waste gas treatment
Part of the exhaust gas from the outlet of the kiln preheater is used as the heat source of the raw material mill system. The rest of the waste gas from the raw mill is discharged into the atmosphere after being dedusted in a bag filter with an air-to-air heat exchanger.
The dust collected by the bag filter is sent to the homogenization warehouse or the clinker warehouse.

5.9 Natural gas fuel system
The extraction point of the fuel feeding system is equipped with flow gates and valves, measuring instruments and meters, and pneumatically transmitted to the main burner and the calciner burner.

5.10 Clinker storage and handling
Set up two clinker warehouses to store clinker.

5.11 Gypsum and volcanic rock storage, crushing and treatment
After arriving at the factory, the volcanic rock was broken, dried and accumulated in a covered warehouse, and the gypsum was also broken and stored. Both gypsum and volcanic ash from the warehouse are fed by a loader, and then transported by a belt conveyor to their respective feeding bins. Each feeding bin has two extraction points, that is, each cement mill is equipped with a feeding bin.

5.12 Cement grinding
The clinker, pozzolan and gypsum are mixed by the belt scale according to the set value, and then the mixture is sent to the circulating cement mill by the belt conveyor. The finished products are sent to the cement warehouse by the air chute and bucket elevator. The exhaust gas from the mill is discharged into the atmosphere after being dedusted by the bag filter.

5.13 Cement storage and shipment
The cement is stored in four round warehouses. The library has a tapered bottom (not a flat bottom), and is equipped with an inflatable cushion to ensure a consistent extraction ratio.
The outgoing cement is transported to the cement packing station via the air conveying chute and bucket elevator. Provide a bulk station for gray-to-water ratio telescopic tank and dust collector, but only feed from one silo.
The packaging station consists of a rotary 8-nozzle packaging machine system with an output of 100 tons/hour. The bagged cement is loaded onto a truck or sent to a finished product warehouse via a belt conveyor.

5.14 Compressed air station
Compressed air is mainly used for bag filters, gas control valves, preheater areas and pneumatic instruments. The total compressed air demand is 40m3/min, and the pressure is 0.5~0.7MPa. The station consists of 4 sets of air compressors and supporting drying/dust collection equipment; 3 sets are for use and 1 set is spare. The capacity of each compressor is 15m3/min, and the discharge pressure is 0.75MPa. Compressed air index: temperature <40°C, dust particle size <1μm, oil 0.01ppm and pressure (air) dew point 2-10°C.
The compressed air from this station is distributed to the workshop through a buffer tank, pressure gauge and control valve.
Serial number workshop name host equipment work plan quantity
1 Limestone single-stage hammer crusher feed size: ≤600×600×600mm
Crushing system capacity: 120t/h
Finished product fineness: 90% ≤25mm 6d/w×7h/d 1
2 Sand and gravel crushing and conveying high-efficiency crusher
Feed size: ≤215mm
Crushing system capacity: 50t/h
Finished product fineness: 90% ≤20mm 1d/w×7h/d
3 Raw material grinding circle flow
Ball mill Φ 3.5×8m
Feed size: ≤25mm
Finished product fineness: <R12% @ 80 μ
Feed moisture: ≤ 8%
Finished product moisture: <1%
Output: 50 t/h 7d/w×20h/d 1
4 Clinker firing Five-stage cyclone, preheater + precalcining furnace designed according to 900t/d
C1:
C2:
C3:
C4:
C5:
Precalciner:
Cyclone outlet temperature: ≤350±10°C
Rotary kiln: Φ3.2×50M
Heat consumption: ≤950kCal/kg
Output: 800t/d (33.3t/h)
Power: 220kW, DC
Fuel: natural gas
Grate cooler: mechanical transmission
Grate bed area: 30m2
Output: 800t/d 7d/w×24h/d 1
5 Cement grinding ball mill: circle flow Φ3.4×11M.
Finished product size: <R3.5% @ 80μ
Output: 45 t/h PC32.5
Power: 1600 Kw 7d/w×22h/d 1
6 Cement bagging 8-nozzle rotary packaging machine
Capacity: 100t/h
Provide a bulk station 6d/w×12h/d 1