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Product Introduction
>Product Introduction
Cement ball mill is the multi chamber grinder, also known as tube grinder. When the aspect ratio is above 4, it is called a long mill or tube mill. Medium and long mills are generally divided into 2-4 compartments internally and are commonly used in cement plants.
Tube mill is an important fine grinding equipment in modern industry, and is one of the most common and important devices in grinding systems. Large tube mills have high production capacity. The tube mill has the characteristics of high crushing ratio, high production capacity, strong adaptability to materials, and easy replacement of worn parts. The main components of a tube mill include: cylinder, feeding section, unloading section, transmission section, etc.
The grinding media (balls or cylpebs) is a kind of carrier be used in ball mill to help crush & grinding minerals. For cement ball mill, the first chamber will used large size balls or cylebs, and the second chamber will used the small size cylpebs. The cylpebs is cylinder shape, this shapes grinding efficiency is better than small size balls. And the super high chromium (Cr: 16-28%) cast grinding balls and cylpebs have high hardness (HRC 58-67) and less grinding media consumption, it is the best choose for cement and other high hardness mineral such as Lead-Zinc ore and Quartz sand.
>Product Advantage
1.Lower consumption cost
Because the high chromium grinding have higher hardness than forged steel cylpebs, and can be make with different content of Chromium (10-28%), so this kind grinding media comsumtions will be only 25%-65% as forged steel & lower chrome casting cylpebs which be used to Ball mill. For some special mineral which have highest hardness such as Quartz sand, choose Top chromium (Cr: 23-28%) cast grinding meidd, the media consumption cost will be much less than other kinds grinding media.
2.Higher hardness
High Chrome cast grinding media casting cylpebs processing with special heat treatment (Oil quench & annealing), will have highest hardness ( HRC 64- 67). Small size Φ6*6 - Φ30*35 mm casting cylinder hardness can be HRC 66, and Φ30*35 - Φ55*60 mm cast cylpebs hardness can make to HRC64, it’s the highest hardness than other kind material grinding media. And this cast high chome cylpebs surface & core hardness difference less than HRC 2.
3.Customized alloy Steel composition
NGZR foundry can match customer’s required to readjust the Chemical Composition of Chromium content (1.0-30%) and other usdful alloying element such as C /Mn/ Si/ Cu/ Ni/ Mo etc, with special heat-treatment processing, that can make this casting grinding cylpebs got different thechnical paramenters, such as hardness / Impact Value / Breakage and de-shaping rate / micro- structure / high PH degree of acid or alkali resistant / high temperature resistance etc, to match customer’s special requirements
4.Customized grinding media shape
NGZR can develop and make different shape of grinding media as: Grinding ball (Sphere) / Grinding cylpebs ( Cylinder) / Grinding egg ( Ellipsoid) / Polyhedron Shape and other special customized shape. Different shape grinding media will have better grinding effect with different grinding conditions
5.lower breakage & out-of-roundness rate
Depend on controlling raw material quality / advanced casting production equipment & special heat-treatment processing, The high chrome grinding cylpebs product of NGZR have good Physical Property, large size cast grinding media breakage & Out-of-roundness rate will less than 1%; Small size casting ball breakage & Out-of-roundness rate will less than 0.5%
Technical Parameters
>Technical Parameters
Alloy Chemical Composition: | ||||||||||
Cast grinding ball Name |
Item | Chemical Composition ( % ) | ||||||||
C | Si | Mn | Cr | Mo | Cu | Ni | P | S | ||
Top Chrome | ZQCr23 | 2.1-3.3 | ≤1.2 | 0.2-1.5 | 23 - 30 | ≤1.0 | ≤1.0 | ≤1.0 | ≤0.06 | ≤0.06 |
Super Chrome | ZQCr18 | 2.1-3.5 | ≤1.2 | 0.2-1.5 | 18 - 23 | ≤1.0 | ≤1.0 | ≤1.0 | ≤0.06 | ≤0.06 |
High Chrome | ZQCr10 | 2.1-3.6 | ≤1.2 | 0.2-1.5 | 10 - 15 | ≤1.0 | ≤1.0 | ≤1.0 | ≤0.06 | ≤0.06 |
Middle Chrome | ZQCr 5 | 2.1-3.6 | ≤1.5 | 0.2-1.5 | 4.0-6.0 | ≤1.0 | ≤0.8 | - | ≤0.08 | ≤0.08 |
Low Chrome | ZQCr 1 | 2.1-3.6 | ≤1.5 | 0.2-1.5 | 1.0-3.0 | ≤1.0 | ≤0.8 | - | ≤0.10 | ≤0.10 |
Product Physical Technical: | ||||||
Cast grinding ball Name |
Item | Physical Technical | ||||
Surface Hardness | Breakage Rate | Impact fatigue Falling ball times | Impact Value ( J /cm2 ) | Micro- structure | ||
High Chrome Ultra | ZQCr23 | HRC ≥ 62 | ≤ 1.0 % | ≥ 15000 | ≥ 3.0 | M +C |
High Chrome Plus | ZQCr18 | HRC ≥ 60 | ≤ 1.0 % | ≥ 15000 | ≥ 3.0 | M +C |
High Chrome | ZQCr10 | HRC ≥ 58 | ≤ 1.0 % | ≥ 15000 | ≥ 3.0 | M +C |
Middle Chrome | ZQCr 5 | HRC ≥ 47 | ≤ 2.0 % | ≥ 8000 | ≥ 2.0 | P +C |
Low Chrome | ZQCr 1 | HRC ≥ 45 | ≤ 2.0 % | ≥ 8000 | ≥1.6 | P +C |
Remark: M= Martensite ; C= Carbide ; P= Pearlite ; AF= Acicular Ferrite ; GJS= spheroidal graphite | ||||||
Existing Product Size & Tolerance: | ||||||
Product Size Φ（mm） | Φ6 / Φ8 /Φ10 Φ12.5/ Φ15/ Φ17.5 /Φ20 / Φ25/ Φ30 | Φ40 / Φ50 /Φ60 | Φ70 / Φ80 | Φ90 / Φ100 | Φ110 / Φ120 | Φ125/Φ130/ Φ140 /Φ150 |
Diameter Tolerance | + 1.0 mm - 1.0 mm | + 1.5 mm - 1.0 mm | + 2.0 mm - 1.0 mm | + 2.5 mm - 1.0 mm | + 3.0 mm - 1.0 mm | + 3.5 mm - 2.0 mm |
Remark: NGZR can customized any ball size from Φ6 to Φ150 mm by casting ; | ||||||
Product Weigth : | ||||||||
Size (mm) | Φ6*8 | Φ8*10 | Φ10*12 | Φ12*14 | Φ14*16 | Φ16*18 | Φ18*20 | Φ20*25 |
Weight (kg /pcs) | 0.002 | 0.006 | 0.011 | 0.017 | 0.025 | 0.035 | 0.050 | 0.095 |
Q’ty (pcs) per mt | 500,000 | 150,000 | 90,000 | 55,000 | 38,000 | 26,000 | 20,000 | 10,000 |
55*60 | ||||||||
Size (mm) | Φ25*30 | Φ30*35 | Φ35*40 | Φ40*45 | Φ45*50 | Φ50*55 | Φ55*60 | Φ60*70 |
Weight (kg/pcs) | 0.165 | 0.260 | 0.4 | 0.55 | 0.765 | 1.02 | 1.32 | 2.1 |
Q’ty (pcs) per mt | 6000 | 3800 | 2500 | 1800 | 1300 | 980 | 750 | 476 |
Product Uses
>Product Application
Be used to grinding the cement raw materials ( Limestone / Clay/ Iron ore or Steel slag / Coal ore etc) and cement clinker by Ball mill & Roller machine. High chromium grinding media is the best choice for cement plant because the grnding media consumption is very less.
>Product Uses
How to select right type /size and quantity of grinding media?
As usually, if the ball mill machine have larger diameter size , input raw ore with larger size and get higher grinding efficiency, need to select large size grinding cylpebs. With same diameter size, the cylpebs grinding efficiency will better than Balls, so if you choose small diameter size grinding media for your Ball mill machine, the Cylpebs will better than Balls. |
In mining processing plant, one stage grinding used large size grinding ball, the second stage grinding used small size grinding ball or cylpebs, choose high chromium grinding media will get less wear cost and high grinding efficiency. In cement plant, The first chamber of cement ball mill used large size high chrome grinding cylpebs, the second and the third chamber will used small size high chrome grinding cylinder. |
For Ball mill first installation , grinding media loading quantity should be 35-45% of whole ball mill loading weight, and the grinding media size will follow mill speed / input mineral size /output size and grinding efficiency to choose. |
Product Processing Video
>Product Processing Video
FAQ
>FAQ
How to require a commerical offer ?
Please send details of your requirement (you can choose item on RFQ list ) to us by E-mail, we will send commerical offer to you within 3 working days.
Can we required free sample ?
Yes, we can provide free sample to you. Please send E-mail to us to confirmed the sample Quantiy & Spec. The sample will be free, but sample express charge & tax fee should be by Freight Collect.
What is your MOQ ?
This MOQ of grinding cylpebs as: 1 tons per each size, 20 tons per each different alloy material, 20 tons for each shipment; In order to reduce the export & transport & shipping charge, When each shipment quantiy more than 100 tons , the order price will be better .
What is your order Lead-time ?
Order Quantity less than 100 mt, the lead-time is 20-30 days after order deposit;
Order Quantity is 100-1000 mt, the first 500 mt need 30 days, balance will be 45-60 days;
Order Quantity is 1000-10000 mt, first 500 mt need 30 days, balance will be 2000 mt each month;
What is your export product package ?
1. Ton bag, 1000 kgs per Bag;
2. Ton bag + Wooden pallet. 2000kg per Pallet;
3. Metal drum + Wooden pallet. 800-1000 kg per drum, 2 drum on one pallet;
What is your payment term ?
For different price & quantity of order, We accept different payment term as below:
1. 30% T/T in advance, balance T/T before shipment ( Quantiy less than 200 tons);
2. 20% T/T in advance, balance O/A 30-60 days ( Quantiy 200-1,000 tons);
3. 10% T/T in advance, balance O/A 60-180 days ( Quantiy more than 1,000 tons);
What is your price term ? How to loading cargoes?
You can choose price term as below:
#1 EXW factory, including VAT tax, Loading cargoes in our factory ( Ningguo city, Anhui );
#2 FOB Shanghai / Ningbo Port, Container loading cargoes in our factory;
#3 CIF Port of delivery, Shipping with container by sea;
#4 DAP place of delivery; Transport with container by sea & by train;
