1.2 million tons of cement production line per year

The 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 conveying, 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 pipe, firing kiln head, clinker conveying, clinker storage and conveying, coal powder preparation and metering and conveying, cement batching station and clinker bulk, gypsum, mixed material crushing and conveying, cement Grinding and transportation, cement storage and transportation, cement packaging, bagged cement loading, cement truck bulk, machine repair workshop and total material warehouse.

product description

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 conveying, 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 pipe, firing kiln head, clinker conveying, clinker storage and conveying, coal powder preparation and metering and conveying, cement batching station and clinker bulk, gypsum, mixed material crushing and conveying, cement Grinding and transportation, cement storage and transportation, cement packaging, bagged cement loading, cement truck bulk, machine repair workshop and total material warehouse.

Process parameters

(1) Clinker output: ≥3300 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, batched, and ground through a roller press to make raw materials, and then fed into the cement rotary kiln to calcinate mature materials, then add appropriate amount of gypsum to the clinker, and add some mixed materials. Or the admixture is ground into cement by a roller press and cement mill, and then transported by a packaging machine or bulk machine to leave the factory. 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

Limestone crushing The dump truck pours the limestone into the hopper. After being crushed by the hammer crusher, it is sent to the limestone pre-homogenization yard by the belt conveyor, and the cantilever stacker is used for layered stacking and reclaiming. The taken-out limestone is sent to the limestone batching bin of the raw material batching station by a belt conveyor. An electromagnetic iron remover is installed on the silo belt conveyor to remove possible iron parts in the limestone. There is a metal detector at the head of the belt conveyor to detect whether there are iron parts in the raw material, so as to avoid damage to the raw material grinding roller press. The raw material batching station is equipped with batching bins such as limestone and clay. The bottom of each batching bin is equipped with a plate feeder and a dosing feeder. The four raw materials are discharged from the respective dosing feeders in the proportion required by the batching. The batches are fed through the belt conveyor and fed into the raw material grinding roller press. Warehouse.

The raw material grinding adopts a roller press system, and uses the high-temperature exhaust gas discharged from the kiln tail as the drying heat source. After the material is squeezed by the roller press, it is dried and classified by the V-type powder separator. After the fine powder is selected by the high-efficiency powder separator, a part of the fine powder is sent to the raw material through the air conveying chute and bucket elevator for homogenization. Library.

The coal mill is installed at the end of the kiln, and part of the exhaust gas from the kiln end is collected by the cyclone dust collector and used as the heat source for drying the raw coal. After the kiln tail gas is humidified and cooled by the humidification tower, it directly enters the kiln tail electric precipitator. The water spray volume of the humidification tower is automatically controlled according to the temperature of the exhaust gas at the outlet of the humidification tower, so that the temperature of the exhaust gas is within the allowable range of the kiln tail electric precipitator Inside, the exhaust gas purified by the dust collector is discharged into the atmosphere by the exhaust fan. The kiln dust collected by the humidification tower is sent to the kiln feeding system or raw meal homogenization silo by conveying equipment. Set up a continuous raw meal homogenization silo, the raw meal in the storage is discharged from the peripheral annular area to the mixing chamber after being inflated alternately. The raw meal is aerated and stirred evenly in the mixing chamber. The required air charge at the bottom of the silo is supplied by the equipped Roots blower. After the homogenized raw meal powder is metered, it is fed into the two feed inlets of the dual series preheater through the distribution valve and the air lock valve through the air conveying chute and the bucket elevator.

The firing workshop consists of a five-stage double series suspension preheater, a decomposition furnace, a rotary kiln, a grate cooler and the corresponding dust removal system, with a daily output of 3300t clinker. The raw meal fed to the preheater is preheated by the preheater and decomposed in the decomposition furnace, and then fed into the kiln for calcination; the high-temperature clinker leaving the kiln is cooled in the grate cooler, and the large clinker is crushed by the crusher , The small clinker that is collected and leaked to the bottom of the air chamber is sent to the clinker warehouse by the clinker chain hopper conveyor for storage. The hot air passing through the clinker bed provides high-temperature secondary air and tertiary air to the kiln and calciner respectively, and the exhaust gas is purified by an electric dust collector and discharged into the atmosphere by an exhaust fan. After the clinker is discharged by the unloading device at the bottom of the silo, it is sent to the automobile bulk loading station by a belt conveyor, and the clinker for bulk outbound transportation is directly loaded into the truck through the dust-free bulk head set at the bottom of each silo.

The pulverized coal preparation adopts a grinding system, and uses the high temperature exhaust gas discharged from the kiln tail as the drying heat source. The raw coal is fed into the coal mill by a metering feeder under the raw coal bunker for drying and grinding. The pulverized coal is discharged into the bag filter along with the airflow. The qualified pulverized coal is collected and sent by the screw conveyor with a load sensor. Pulverized coal silo. After being measured, the pulverized coal is sent to the kiln head burner and the kiln tail calciner to burn. The dust-containing gas is discharged into the atmosphere by an exhaust fan after being purified by an anti-static bag filter. Both the pulverized coal silo and the bag filter are equipped with CO detectors and explosion-proof valves. The whole plant has a central laboratory, which is responsible for the inspection of raw materials, semi-finished products and finished products of the whole plant. An air compressor station is also set up to supply compressed air for the whole plant.

The clinker, gypsum and additives in the cement batching station system are measured by a quantitative feeder at the bottom of the silo, and then fed into the cement grinding system through a belt conveyor and a hoist for grinding. The cement grinding system adopts two sets of combined circular flow grinding system composed of PFG160-140 roller press Φ3.2×13m ball mill.

The cement is stored in a 2-φ18m round warehouse, and the outgoing cement is discharged to the cement metering warehouse through the discharge port at the bottom of each warehouse. The cement metering warehouse is equipped with a load cell and aeration device. There are four discharge ports under the silo, and each discharge port is equipped with a flow control valve and a flow meter. The measured cement is sent to the cement packaging system by the air conveying chute through the second route, and the other two routes are used for bulk loading at the bottom of the silo. The design capacity of the bulk system is 150t/h.