Clinker Grinding Unit

Raw material vertical mill
CHAENG GRMR raw material vertical mill is a kind of new high efficiency, energy saving and environment friendly grinding equipment specially for cement raw material.Capacity :30-720 t/h
Power :17-20 kWh/t

Finished fineness :80 μmR 12-15%

 Overview

Traditional clinker grinding unit adopts ball mill to grind clinker, and has much dust, loud noise and high energy consumption in the process of production, it will be replaced gradually by vertical roller mill

Clinker grinding processing：

Clinker grinding is the stage in which the final product stage in cement production ,it is independent of each other. In this stage, the cement clinker is added with an appropriate amount of the mixed material ,it is be ground to produce finished cement.

The electric motor drives the disc through the reducer, and the hot air enters the vertical roller mill from the air inlet. The material falls from the feeding mouth to the center of the disc. Because of the centrifugal force, the material moves from the center of the disc to the edge of the disc. Grinding roller crushed, crushed material continues to move to the edge of the disc until the wind ring at the air flow away, and large particles of material and fell to the disc to continue to crush. The airflow through the upper part of the material separator, the role of the guide vane, the rough material from the cone down to the disc, the fine powder along with the air out of the mill, the dust collector system to be collected powder For vertical roller mill grinding out of the product. The material is dried in contact with the gas in the housing to achieve the desired dry and wet product. By adjusting the angle of the guide fan blades and the rotor speed of the separator, can achieve the required product thickness. 

Specifications

Model	Grinding Table Diameter (mm)	Standard Ability Q (t/h)	Motor (kW)
GRMR22	2,200	65-75	710
GRMR24	2,400	75-85	800
GRMR26	2,600	85-95	900
GRMR28	2,800	100-110	1000
GRMR30	3,000	110-120	1120
GRMR33	3,300	140-150	1400
GRMR36	3,600	180-190	1800
GRMR38	3,800	200-210	2000
GRMR40	4,000	230-250	2240
GRMR43	4,300	260-280	2500
GRMR46	4,600	330-350	3150
GRMR48	4,800	350-370	3350
GRMR50	5,000	370-400	3550
GRMR53	5,300	440-470	4200
GRMR56	5,600	470-500	4500
GRMR60	6,000	550-600	5300
GRMR65	6,500	670-720	6300
GRMR70	7,000	850-900	8000

Note: mill spectral pattern benchmark

(1) Material medium friction (MFs)=0.9~1.0;

(2) Material moisture max 15%;

(3) Refined powder granularity 4200~4500 cm²/g;

(4) Refined powder moisture 0.5~1.0%;

(5) The concrete mill installed power and technology parameter will be adjusted appropritely basing on the actual material property and requirements of owner;

PT.Indoferro 300000t/a nickel slag grinding plant EPC project

Project introduction: this project was launched by PT.Indoferro for the purpose of disposing the nickel slag produced in steel smelting processRaw material :nickel slag
Main equipment configuration :GRMS33.31 slag vertical mill
Production time :November 2016
Features
Project introduction: this project was launched by PT.Indoferro for the purpose of disposing the nickel slag produced in steel smelting process, and is the first nickel slag powder production line in Indonesia. This project was built by Xinxiang Great Wall. This project was started in June 2016 and finished and went into operation in November 2016, the output of a single mill per hour is 50t with the specific surface area of 450㎡/kg, and all parameters reach the designed requirements. The demand of the nickel slag powder produced by this project exceeds the supply, so the client praise Xinxiang Great Wall for its high-quality equipment, advanced technology and good construction.


Service & Surport
Founded in 1958 and located in Xinxiang, Henan province, CHAENG has 60-year experience in equipment manufacturing with an area of 330,000 m2 and 1 billion RMB of annual production value. The company is specialized in manufacturing all kinds of ball mills, rotary kilns, vertical mills, large steel castings. And we can undertake the EPC projects of cement production line, quick lime production line, blast furnace slag/ steel slag/ nickel slag grinding plants. Its products are sold to more than 50 countries and regions in Southeast Asia, Central Asia, South Asia, North America, South America and Europe.
Our long-term strategic partners: Arcelor Mittal, Tata Group, Pohang Iron and Steel Company, Germany CCE, Japan Chiba , Shanghai Baosteel，Voestalpine and ASGT, etc.

CHAENG 300t/h Stone Crushing Plant

Stone crushing plant is a specialized production line aimed to produce building sand and stone, saving 50% energy than traditional stone production line. It enables the rock, sand and gravel, cobble and other materials to be made into various granularities conformed to the requirements of building sand.

 

At the same time, we can provide the optimum equipment setup schemes according to customer's demands for specification, yield, etc. 

CHAENG 300t/h Stone Crushing Plant, Applied material, limestone, slag, clay, granite, cobble, dolomite, bluestone, etc.

The advantages of CHAENG new-type stone crushing line

1. Reasonable grade of finished productm and high quality

2. Wet process, being environmental friendle

3. Advances equipment with low operating costs, intelligent control to save the Re-treatment of wastewater and sludge, to increase second profit

CHAENG Sand Making Plant

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Sand is widely used in road construction, real estate development, concrete making etc. With the rapid development of construction industry, the amount of the natural sand failed to keep pace with the various sectors of modern world development needs. So People need other ways to get the sand. It is why CHAENG VSI Shaft impact crusher is so welcome.

One complete sand making plant is always made up of vibrating feeder, jaw crusher, impact crusher, vibrating screen, VSI sand making machine and sand washing machine.

Sand making plant processing flow

The raw materials are first put into elementary-crushing machine jaw crusher for primary crushing, and then the belt conveyor transfers the elementary products to the secondary-crushing machine for secondary crush.

The secondary products will be separated into two kinds by the vibrating screen. The parts satisfying the standard of the Vertical Shaft Impact Crusher will be conveyed to the VSI sand-making machine and the other parts will return to the secondary-crushing machine.

The parts into the sand-making machine will be the crushed by sand making machine and discharged products will be stored directly as final products. Or some will be washed by SBM sand washing machines if producers would like to produce higher grade clean products.

Pre: CHAENG 300t/h Stone Crushing Plant

rotary kiln parts, kiln shell, kiln tyre,kiln big gear

After a long-term operation, large rotary kiln and grinding mill always begin to have various problems. Once a rotary kiln accident occurs, it will cause huge loss because of production stoppage. Therefore, the regular maintenance of large rotary kiln and grinding mill, and replacement of the spare parts, can effectively extend the service life of the components.
As a well-known service provider for large kiln and grinding mill, CHAENG can produce large mechanical spare parts (1-150tons/piece) for building materials, cement, metallurgy, mining and other industrial industries, including ball mill trunnion, girth gear, vertical mill roller and table, rotary kiln shell, support roller, etc. CHAENG is the large parts supplier for many famous enterprises such as China National Building Material Group, Shanshui Cement, Lafarge, Taimu, and Wannianqing cement, TaTa.
The causes of deformation of the kiln shell
1. Over-high output increases the wear of kiln mouth shell, and causes the overheat deformation of the kiln shell.
2. The heat flow is too large but the cooling zone is short, and the working environment of the kiln mouth is poor.
3. The cylinder temperature is too high, the thermal expansion is large, while the strength of the high temperature resistant materials is seriously attenuated.
4. The guard bolts at kiln mouth are loosen, so that the refractory materials fall off, and thus the shell is burnt.
5. Improper handling during burning contaminated soil causes severe corrosion of the cylinder shell.
6. The corrosion of sulfur, phosphorus and chlorine on the kiln shell reduces the thickness and strength of the kiln cylinder, also reduces the plasticity of the steel and increases the brittleness of the steel, which may lead to brittle failure of the kiln cylinder.

It can be concluded that it is very necessary to regularly detect the running condition of the components, and timely find problems, to improve the economic benefits of the enterprise, and effectively extend the service life of the equipment!

Other steel casting spare parts

Besides rotary kiln shell segments, CHAENG also launched a full range of spare parts services fro rotary kiln and grinding mill, including rocker arm, grinding roller and grinding table for vertical roller mill; girth gear, support roller and riding ring for rotary kiln; girth gear and trunnion for ball mill, to provide customers with large mechanical spare parts needed in the whole kiln and mill, meeting the needs of different industries.

                                                          

Ball mill 

trunnionMaterial: ZG230-450
Weight: 5-30T
Used in: Ball mill
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Girth gear

Material: ZG45, ZG42CrMO

Weight: 10-80T
Used in: Ball mill, rotary kiln
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Chaeng environmental friendly lime kiln

Recently, the number of advisory customers for Great Wall Machinery lime kiln is increasing especially gains more attention from many building materials factories, after put into production of annual output of 400,000 tons lime production line, which is Great Wall contract to build for Guangxi Huayan.

It is reported, at present, there are a lot of lime production line were built in domestic, their common features are output in 200-300 tons per day, running in good condition in the later, ideal for build in small and medium lime enterprises, for example, Guangxi Huayan with capacity of 300 tons per day .

Unlike domestic, the new lime kiln capacity is higher at abroad, 2200 tons per day has been put into production, which will be the development tendency of domestic lime kiln. That is to say, develop to upsizing, towards large-scale direction.

1、How about the lime activity degrees produced by the environmental lime kiln?

The lime activity degrees produce by environmental lime kiln is higher than the shaft kiln. The lime activity can reach up to 400ml on equal terms.

2、How about products produced by the environmental kiln?

3、What’s the requirement on the granularity of raw material for lime kiln?

Rotary kiln can be directly calcine fine limestone in 10-50 mm. Build lime production line with rotary kiln, not only can make full use of high-quality limestone resources, and in line with the lime industry sustainable development policy.

4、Does lime production line need configure the preheater?

Vertical preheater configured in the kiln end can make full use of high temperature flue gas produced by calcination in rotary kiln; preheat limestone from room temperature to the initial state of decomposition, which not only can greatly improve the production of rotary kiln, can reduce heat consumption per unit product adequately.

5、How to do the environmental friendly?

The smoke temperature exhaust from vertical preheater of kiln end is low, between 280-350 ℃; low dust content, about 20g/Nm3, efficiently simplify the configuration of follow-up treatment to the flue gas, can successfully meet environmental requirements.

6、How much money to invest environmental lime kiln?

Because of different production capacity and the specific mining conditions of each region, the entire line and single devices with different prices, so please contact us for the details.

7、What is the production process of lime line?

Lime production line is a complete production line that composed of vertical preheater, rotary kiln, grate cooler, flue gas treatment system, raw material conveyor systems, product delivery systems, coal grinding system.

All line adopts advanced technology, DCS central control system in reliable performance, centralized operation and management in the main control room.

Chaeng Energy saving cement vertical grinding mill

Now, most cement factory in China still take the high energy emission and high pollution cement ball mills.But the vertical roller mill has take the materials bed grinding, and take the crushing, grinding,drying and selection together. During grinding, it not only reduce the electric emission, but also reduce the Co2 emission. For many companies, take the vertical roller mills to replace the ball mills is the best choice. The age of grinding without balls is coming. 
1. Vertical roller mill system saving energy can over 30%.        
From our customers, compared with ball mills, the vertical roller mill has big advantages of unit electric emission, grinding balls loss and the total equipment. 
Take our GRMK46.41 vertical roller mill as an example, the details loss parameters as the form below:

Items	φ4.2×13m ball mill and roller press machine	GRMK46.41 vertical roller mill
Design capacity(t/h)	140	150
Reality capacity(t/h)	150	180
Fineness(m²/kg)	370	370
Electricity emission(kWh/t)	49	33
Grinding balls loss(g/t)	25	5
Total power(kWh)	7000	5000

From the form above, the electric emission of vertical roller mill is 33kwh/t, compared with ball mill, lower 16kwh/t，the lower ratio is 33%. At the same time, the capacity will raise 30% and the cost lower 80%.

2. The vertical roller mill system can reduce the Co2 emission.

With the obviously low energy cost, high efficiency advantages,according to the texts, compared with ball mills, during per ton cement production, the vertical roller mill can reduce the Co2 emission 7.9-19 kg. It means that, a 5000t/d cement plant, it can reduce the Co2 emission 1185o--28500 tons per year.