Industrial Ball Mill for Heavy Calcium Carbonate Processing

Product Description

Large Capacity Ball Mill for Heavy Calcium Carbonate Powder

Product Introduction:
 

1.Introduction of Lime Grinding Plant

Lime Grinding Plant (Calcium Carbonate Grinding Plant) has a simple process flow, high milling efficiency and stable finished product quality. The whole limestone grinding production line mainly includes crusher, hoist, automatic feeder, grinding host, classifier, power unit, pipeline device, dust removal device, electric control system, storage hopper or discharge valve, etc. It also includes a grinding roller assembly, a plum blossom frame assembly, a grinding roller, a grinding ring, a blade holder, a blade, a cover cylinder, and the like.
 
From raw ore to fine powder, in general, Limestone will go through these steps: 
1. Picking: removing impurities, improving the quality of raw ore 
2. Crushing: Limestone crushing is very important in limestone processing plant, probably crushing to below 30mm 
3. Grinding: Limestone grinding is the integral step in limestonestone production process. It produces fine powder for many applications and prepares materials for further processing and beneficiation process, from 80 mesh to 400 mesh according to different demands. 
 
The fine powder that can be adjusted and graded to meet the mesh requirements is collected as a finished product, and the unqualified powder is continuously ground, collected, and packaged.
 
We offer complete solution for lime grinding plant, clinker grinding plant, bauxite grinding plant, dolomite grinding plant, coal powder grinding plant etc. 

2. Production process description of  calcined lime plant
1.Raw material feeding
The limestone in the plant yard will be carried by tractor shovel and feed to hopper, it will be discharged from hopper to vibrating feeder and sent to vibrating screen for screening through belt conveyor. The size ≥20mm will be sent to pre-heater by conveyor. And size less < 20mm will be carried away.
2.Calcination 
The limestone in the pre-heater will be preheated by the hot air, then it will be discharged to rotary kiln though chute that connecting pre-heater and kiln, it will stay in the kiln for 1.5-2 hours for calcination, during the process, it will be calcinated with a temperature around 1300 °C, limestone decomposition, release of CO2, become calcined lime. Then the lime moves to vertical cooler for cooling.
3. Calcined lime conveying 
Calcined lime will be discharged to a chain conveyor by vibrating feeders in the bottom of vertical cooler, it will be lifted to storage hopper by bucket elevator. So the lime in the storage hopper for dispatch or hydration workshop. 
4.Dust filtering .
There are two dust filtering systems, one is in the kiln inlet, dust will be filtered by bag filter then the clean gas will release to air. The other is dust from lime storage hopper and feeding of bucket elevator will be filtered by bag filter then release to air. 

 

3.The process advantage calcined lime plant

The calcined lime plant process adopts pre-heater+ rotary kiln+ vertical cooler system, , it can reduce the fuel consumption 40%, increase output capacity 30% due to reuse the waste gas in the system. The other advantages are in the following.
1.The lime quality is very good and high activity.
2.It is especially suitable for large-scale lime production. 
3.The production running is stable, the whole process using negative pressure, air flow freely and high production safety 
4.Using the bag filter system, it can reduce the exhaust gas less than 50mg/Nm3
5.It shorten kiln length, reduce heat loss and area. 
6.Cooler and kiln hood cover designed together, good seal, saving area. 

4.The Flow diagram of calcined lime plant:

 

Scope of delivery and service:
 

- Feasibility study

- Creating of basic engineering

- Creating of construction (as-built documentation)

- Delivery of the complete production line equipment

- Delivery of automation system

- Delivery of electrical kits

- Delivery of Lab and test, engineering station for permanent quality monitoring

- Erection the entire plant on the prepared foundations.

- Taking in function (set and run up) of the entire plant.

- Training of customer's operating staff

- Hand over operating manuals and trouble shooting guide line

- One year full replacement warranty

 

The delivery does not include:

- Delivery and transport from the customer's harbour to the erecting place

- Civil work

- Any building work

- Grounding work

- Entire steel frame work

- Lightning protection

 

Capacity		200t/d	225t/d	250t/d	300t/d	400t/d	500t/d	600t/d	800t/d
Preheater	Shape	Hexagon	Hexagon	Octagon	Octagon	Octagon	Decagon	Dodecagon	Dodecagon
	Qty. Of Top Silo	6	6	8	8	8	10	12	12
	Qty. Of Hydraulic Pusher	6	6	8	8	8	10	12	12
	Preheating Capacity (t)	600	600	800	800	800	1000	1600	1600
Rotary Kiln	Size	Φ2.8×42m	Φ3.0×50m	Φ3.2×50m	Φ3.3×55m	Φ3.6×55m	Φ3.8×58m	Φ4×60m	Φ4.3×56m
	Slope	3.50%	3.50%	3.50%	3.50%	3.50%	3.50%	3.50%	3.50%
	Rotating Speed (r/min)	0.3-1.8	0.3-1.8	0.3-1.8	0.3-1.8	0.3-1.8	0.3-1.8	0.3-1.8	0.3-1.8
	Calcination Temperature (ºC)	1350	1350	1350	1350	1350	1350	1350	1350
Cooler	Type	Vertical	Vertical	Vertical	Vertical	Vertical	Vertical	Vertical	Vertical
	Qty Of Temperature Control Area	3	3	3	3	3	3	3	3
	Qty. Of Wind Tower	4+1	4+1	4+1	4+1	4+1	4+1	4+1	4+1
	Size(m)	3.6×3.6	3.6×3.6	3.6×3.6	3.6×3.6	4.1×4.1	4.1×4.1	4.1×4.1	4.7×4.7
	Output Temperature (ºC)	≤120	≤120	≤120	≤120	≤120	≤120	≤120	≤120
Product Thermal Loss(kcal/kg)		5500	5400	5400	5400	5400	5400	5400	5000
Available Fuel		Coke oven gas, mixed gas, natural gas, coal powder, low heating value coal gas

 

Company information:

Established in 1956, Henan Zhengzhou Ming Machinery Co. Ltd. is an entrenched factory appointed by Ministry of Machine-Building Industry and department of electrical machinery industry of Henan province. After development of over half a century, it has become a comprehensive modernized enterprise which integrates research, design, exploring, manufacturing, selling, installing, debugging and training. Our factory owns fixed assets of more than RMB800 000,000.

Our main products include: rotary kiln, rotary dryer, cooler, ball mill, preheater, conveyor, etc. and complete sets of machinery for cement production line, active lime production line, magnesium production line and ceramic sand production line. We have project cases through every province of China our products have been exported to Russia, Korea, Vietnam, Malaysia, Nepal, Bangladesh, Mexico, Armenia, Africa, South America and other countries and achieved great popularity.

 

Packaging and Shipping: