Roller Mill with Three Classifiers
Product Introduction.
The Longyi New Ring Roller Grinding Mill is a new type of grinding mill developed by our company based on our own technological research and development capabilities and drawing on the characteristics of similar products in China and abroad. It has comprehensive mechanical crushing performance such as rolling, grinding, and impacting. Our company provides diversified customized solutions based on the different needs of users for finished powder, helping customers produce personalized powder products. It has characteristics of large output, low energy consumption, long service life, and easy to do maintenance, making it the best choice for users to achieve efficient investment returns.
Technical advantages: 1. Strong reliability 2. Low power consumption 3. Internal system optimization and efficiency improvement 4. Intelligence 5. Improvement of environmental performance.
Application: Processing of non-metallic minerals such as calcium carbonate, kaolin, barite, talc, gypsum, limestone, calcium oxide, bentonite, dolomite, etc.
I. Product and indicator requirements (the following product specifications are tested by Dandong Baite 9300ST R.R testing machine).
The technical plan for the grinding system of this ring roller grinding project is formulated based on the customer's material parameters and production conditions,the plan includes design, manufacturing, supply, and guidance for installation and debugging, ultimately meeting the buyer's production requirements.
1. Material properties.
| Item NO. |
Raw material is calcium carbonate granulars
|
| 1 |
Material status |
Small block materials crushed by the crusher |
| 2 |
Material particles |
≤10mm granule |
| 3 |
Material color |
White |
| 4 |
Material temperature |
Ordinary temperature |
2. Product requirements
| Item NO. |
Product name |
Calcium carbonate |
| 1 |
Moisture |
Process moisture increment ≤ 0.3% |
| 2 |
Mobility |
Normally |
| 3 |
Product temperature |
≤40ºC |
| 4 |
Hygroscopicity and deliquescence |
Normally |
| 5 |
Particle size |
D97:≤8.5-9um
D97:≤5.5-6um
D97:≤4.5-5um |
3. Equipment manufacturing characteristics.
| Item NO. |
Item name |
Form |
| 1 |
Raw material feeding method |
Belt conveyor |
| 2 |
Form of crushing system |
Negative pressure operation |
| 3 |
Feeding method |
Variable frequency monitoring of feeding speed |
| 4 |
Exhaust method |
Exhaust gas discharge from bag filter |
| 5 |
Control mode |
Centralized control of control cabinet |
| 6 |
Discharge method |
After grinding,filter bag for dust collection, it directly enters the storage tank or packaging machine |
4. Operating parameters and production capacity
| Item NO. |
Item name |
Parameters |
| 1 |
Capacity |
D97:≤8.5-9um
D97:≤5.5-6um
D97:≤4.5-5um |
| 2 |
Air volume of grinding system |
≥10000m³/h |
| 3 |
Mill running speed |
≥200rpm/min |
| 4 |
Total power |
373KW |
| 5 |
Compressed air |
3.0m³/min |
II. Production capacity and equipment requires.
| MODEL NO. |
Product particel size |
Operation mode |
Capacity |
Number of equipment |
Total annual production |
| LYHM-1100X |
D97=8-8.5um(1500mesh) |
Single machine continuous operation |
3.3-3.6 t/h |
1 |
23760-25920T/year |
| D97=6.5-7um(2000mesh) |
2.7-3.0 t/h |
19440-21600 T/year |
| D97=5-5.5um(2500mesh) |
2.2-2.4 t/h |
15840-17280 T/year |
| D97=4-4.5um(3000mesh) |
1.4-1.6 t/h |
10080-11520 T/year |
| D97=3-3.5um(4000mesh) |
0.8-0.91 t/h |
5760-6480 T/year |
Notes:1.Calculate the production capacity of the ring roller mill as dry powder based on 7200h/year;2. The above capacity is for reference. The hardness of ore, feed fineness, and moisture content all can influence the capacity, and these particle sizes are tesed by Dandong Baite 9300ST R.R testing machine.
Raw materials requirements:
| CaCO3 |
≥98% |
Iron oxide |
≤0.05% |
| Magnesium oxide |
≤0.8% |
Silica |
≤0.1% |
| Mohs Hardness |
≤3 |
Particle size |
≤10mm |
III. Process Flow Diagram.
VI. Equipment configuration list.
| Equipment name |
Model and specification |
Unit |
QTY. |
Manufacturer |
| Feed system |
| Silo |
Customized |
PC |
1 |
Customer |
| Feeding belt conveyor assembly |
LYDS |
SET |
1 |
LONGYI |
| Motor reducer assembly |
XWD4-23-1.5KW/3KW
frequency conversion |
SET |
1 |
JIANGSU GUOMAO |
| Host system |
| Grinding stand |
4 layers / super-hard steel |
SET |
1 |
LONGYI |
| Grinding ring |
2 layers / super-hard steel |
SET |
2 |
LONGYI |
| Grinding roller |
Specially made/super-hard steel |
PC |
40 |
LONGYI |
| Pin shaft |
Upper pin shaft/lower pin shaft/superhard steel |
PC |
10/10 |
LONGYI |
| Classifier wheel |
Specially made |
PC |
3 |
LONGYI |
| Host motor |
YE2-355L-8 V1/200KW |
PC |
1 |
TIAN NENG |
| Classifier motor |
YVF2-225M-4 V1/18.5KW frequency conversion |
PC |
3 |
TIAN NENG |
| Dust collecting system |
| Filter bag |
φ128x2400 |
PC |
420 |
YANCHENG DEER |
| Pulse Valve |
DMF-Z-62S-1.5 |
PC |
36 |
ZHEJIANG JIAXIN |
| Discharge screw conveyor |
φ273 |
SET |
1 |
LONGYI |
| Discharge screw motor |
Y100L2-4-3KW |
PC |
1 |
JIANGSU GUOMAO |
| Discharge spiral reducer |
XWD4-23-3KW |
SET |
1 |
JIANGSU GUOMAO |
| Discharge valve |
LYXL-350 |
SET |
1 |
LONGYI |
| Blower system |
| Blower |
8# |
SET |
1 |
YUANDA |
| Blower motor |
YYE2-4-110KW,
frequency conversion |
PC |
1 |
HUNAN TIANNENG |
| Control system |
| Electric control cabinet |
|
SET |
1 |
LONGYI |
| Frequency converter |
18.5KW |
PC |
3 |
WUHAN ZHENGXUAN |
| Frequency converter |
110KW |
PC |
1 |
WUHAN ZHENGXUAN |
| Frequency converter |
1.5KW-3KW |
SET |
1 |
WUHAN ZHENGXUAN |
| Auxiliary system |
| Inlet/outlet duct |
Φ600/Φ700 |
SET |
1 |
LONGYI |
| Electric air valve |
Φ700 |
SET |
1 |
LONGYI |
| Pneumatic air valve |
Φ700 |
SET |
1 |
LONGYI |
Notes: 1. Due to processing and transportation costs, tanks and silos are recommended to make by customers own on site.
2. Civil engineering, installation, platform, wires and cables, and public utilities are handled by the customer themselves.
V. Description of production process and characteristics.
6.1)Host system
A: The equipment structure of the host system - LYHM1100G ring roller mill uses the principles of impact, compression, and grinding to crush materials. There is a large gap between the grinding wheel fixed on the grinding wheel bracket and the pin shaft. When the grinding wheel bracket rotates with the main shaft, the grinding wheel is thrown towards the grinding ring by centrifugal force and presses against the inner wall of the grinding ring. The crushed material falls onto the throwing plate under the action of gravity and is thrown into the airflow channel, Under the negative pressure suction of the system fan, the powder enters the classification chamber with the airflow for classification. Qualified fine powder enters the rear collection system through the classification wheel for collection, and the material is thrown towards the inner wall of the drainage ring, and then falls back into the crushing chamber for crushing.
B: Configuration - The grinding wheels are arranged in four layers;
The materials of the grinding wheel, grinding ring, and grinding wheel frame are all made of superhard steel;
The main motor power is 200KW, and the classifier motor power is 18.5KW, with 3 (variable frequency);
Special grading wheels;
C: Production requirements - The grinding wheel, grinding wheel frame, and grinding ring require high coordination with each other, otherwise it will result in high energy consumption. At the same time, the material wear resistance and strength requirements of these three major components are high to ensure the reliability of product quality. The grading wheel has high rotational speed, and the production requires high rotational balance, good blade wear resistance, and the quality of the graded powder can meet the requirements.
6.2)Dust collecting system.
Bag dust collection device, bag specifications φ 128X2400420 bags,
A: Pulse bag dust collector: Filter area: 405
Bag specifications: φ one hundred and twenty-eight × 2400; Fabric bag material: polyester needle felt,
Number of cloth bags: 420; Pulse valve specification: 1.5 inches
Number of pulse valves: 36;
B: Discharge screw conveyor:
Spiral diameter: φ 219mm, length according to actual layout requirements
Spiral motor model: Y100L2-4-3KW; Reducer model: XWD4-23-3KW
C: Discharge valve model: LYXL-350
6.3)Blower system.
Fan model: No. 8; Motor power: 110KW, Frequency conversion control
6.4)Control system
Control mode: panel button switch; Starting method of the host: soft start.
Motor control method for classifier and feed conveyor: variable frequency control;
Inlet/outlet duct diameter φ 600/ φ 700, the air valve is controlled by electric and pneumatic means
VI. Advantages Compared to other factory's equipments.
| Item NO. |
Item name |
Other factory's equipments |
Longyi equipments |
| 1 |
Feed system |
Ordinary material/single layer mechanism |
1.The feeding port structure of the host adopts a wear-resistant feeding mechanism, greatly extending the service life of the upper cylinder material port;
This is our patent technology, patent number:201820995641.9; |
| 2 |
Classifier system |
Traditional air duct |
1.Optimize the pneumatic conveying system, ensuring smooth airflow operation;
2.Optimize the transmission system of the classifier to ensure smoother operation of the classifier wheels;
3. The classifier wheel adopts a labyrinth groove structure, effectively preventing coarse material running out.
4. Adopting a new type of wear-resistant plate, effectively extending the service life of the grading wheel; |
| 3 |
Dust collecting system |
Ordinary filter bag |
1. Reasonable bag selection and high dust collection effect;
2. The dust removal box has a reasonable structure, it is not easy to accumulate powder, and the discharge is smooth; |
| 4 |
Host system |
Spindle through-hole design |
1. The structural change of the host bearing seat has completely solved the problem of bearing seat sinking, effectively protecting the host and improving the crushing and grinding capacity;this is our patent technology,patent number:201821196756.8; |
| 5 |
Wearing spares |
Wearing plate |
Adopting a combined wheel frame structure, optimizing manufacturing process and process control, achieving full traceability management of product quality, fully ensuring the stability and service life of product quality; The pin shaft adopts new materials, effectively extending the service life of the pin shaft. |
- Our New Ring Roller Mill series is a new type of crusher developed by the company based on its own technological research and development capabilities and drawing on the characteristics of similar products at home and abroad. It has comprehensive mechanical crushing performance such as rolling, grinding, and impact. Its technical advantages lie in high reliability, low energy consumption, improved environmental performance, intelligent operation, and other advantages. The company provides diversified customized solutions according to users' different requirements for finished powder, Helping customers produce personalized powder products with unique features in service life and maintenance is the best choice for achieving efficient investment returns.
|
VII. Relevant Patent Certificates (More than 80 patent certificates)
VIII. Some of our customers.
IX. Quality assurance system.
- Quality is the life of an factory, ensuring quality and providing good services is the foundation of winning trust from customers.We have always adhered to the purpose of "quality first, reputation first, and user first" and conscientiously implemented the quality policy of "Longyi Manufacturing, Honoring Quality";
- We always prioritizes quality work. On the basis of achieving comprehensive quality management standards, combined with the characteristics of our company and meeting the ISO9001-2015 standard, a total of 26 quality manuals and procedural documents have been prepared. There are 7 qualified internal quality system auditors who have undergone professional training to improve their own quality and business level through training and learning, They have played a crucial role in the operation of the enterprise quality system. They are respectively distributed in the corresponding department management systems established by the company, and have determined the leading departments and related responsibilities for each manufacturing process;
- In terms of specific product quality control, we strictly controls product quality according to the production process and relevant operation instructions.
(1)Raw materials and spares supplier's quality control:
1.1 Conduct inspection and evaluation of suppliers, and conduct a "tripartite review" of key and major component suppliers through technology, quality, and procurement to evaluate process assurance capabilities, quality control capabilities, production capabilities, and costs, and establish a qualified supplier list.
1.2 Evaluate the samples, and only qualified samples can be used for small batch trials and market validation. After verification, large-scale supply can be carried out.
1.3 The quality control of incoming materials is mainly carried out through sampling inspection and verification, in accordance with the "LY-WI-PG-001-2018 Operation Instructions for Incoming Inspection of Purchased and Outsourced Parts" and the "Statistical Sampling Regulations" for sampling inspection and verification of incoming materials.
1.4 We purchased drive motor products use well-known national brands, and the main technical parameters, performance and technical level meet and exceed national standards.
1.5 Equipped with a portable flaw detector and hardness tester, it facilitates 100% on-site inspection of the performance of large accessories, continuously monitors the quality of incoming materials, and ensures the stability of equipment component quality.
(2)Quality control of machining process:
2.1 The process implements a "three inspection system" of self inspection, mutual inspection, and specialized inspection, and implements a quality review system that combines product audit and process audit. 200% inspection (double 100% inspection by operators and inspectors) shall be conducted on the appearance of all key and main component processing dimensions to ensure the quality of assembled parts. The quality engineer of the quality control department, together with on-site technicians, shall conduct a monthly audit of at least 5 key component products.
(3)Quality control during assembly process:
3.1 Implement a "three inspection system" of self inspection, mutual inspection, and specialized inspection
3.2 The operator shall assemble according to the "LY-WI-PG-009-2019 Assembly Standard Specification" and self check and record the "Assembly Record Card". The inspector shall conduct component assembly tests according to the "LY-WI-PG-012-2019 Assembly Test Operation Guide", and inspect and record according to the "LY-WI-PG-010-2019 Coating Operation Guide". Assembly record cards, test records, and coating inspection forms form the company's product quality control records.
(4)Establish and improve the quality responsibility system:
4.1 Establishing a quality responsibility system is a fundamental task for our company to carry out comprehensive quality management, and it is also an indispensable part of our company's establishment of a quality system. Adhering to the principle of putting prevention first and following the principle of "ensuring that everything is managed by someone, everyone has a specific responsibility, there are standards for handling matters, and there is a basis for assessment", the company has formulated documents such as the "LY-WI-PG-006-2018 Product Machining Quality Assessment System", "LY-WI-PG-008-2019 Assembly Quality Assessment System", and "Job Description". Combining various work related to quality with the enthusiasm and sense of responsibility of the majority of employees to form a rigorous quality management system. Once product quality problems are found, quality tracking can be carried out quickly to identify quality responsibilities, summarize experiences and lessons, and better ensure and improve product quality. A rigorous and effective comprehensive quality management system has been established within the company.
(5)Product Traceability:
5.1 In order to ensure that product quality meets customer requirements, avoid confusion about product conformity status, and ensure quality control, the company has developed the "LY-WI-PG-004-2018 Product Quality Status Identification Rules", which use appropriate methods to identify products throughout the entire product implementation process and identify product status based on monitoring and measurement requirements. In situations where traceability is required, control and record the unique identification of the product to ensure its traceability. Our equipment is tested according to our company's factory inspection procedures before leaving the factory. The entire manufacturing implementation process strictly follows the ISO9001 quality system. Our company guarantees that the technical materials delivered are complete, clear, and correct, and can meet the requirements for equipment installation, trial operation, performance assessment, operation, and maintenance specified by your company. At the same time as the equipment arrives at the customer's site, ensure that the dispatched technical personnel are in place immediately, and provide correct and sufficient technical services for the installation, commissioning, performance assessment, acceptance, operation, and maintenance of the contracted equipment, ensuring the interests of the customer. Ensure that the equipment is manufactured and inspected using high-quality materials and advanced technology in strict accordance with design drawings, technical requirements, system functions, national requirements, and relevant departmental (industry) standards. The entire manufacturing process is strictly implemented in accordance with the ISO9001 quality system, ensuring that the products are brand new, technologically advanced, of superior quality, and free from defects in design, materials, and processes. Quality first is our consistent principle, and serving users is our responsibility. We warmly welcome new and old customers to provide valuable opinions on our product quality assurance measures. We will definitely improve and better serve customers.
(6)Three system certification certificate:
X.Service & support
With a team of experienced engineers with a strong sense of service ,we devoted to build up a complete customer services system with high efficiency to offer high value-added technical support and professional after sale services for customers.
1. Pre-sale
1)Equipment sizing assistance based on customer's demand.
2). Assistance in planning the layout of workshop according to the customer's site conditions.
3)Free design of the foundation drawing and process flow diagram.
4)Guidance on preparatory work.
2. During sale.
1).Strictly control of product production to ensure product quality.
2)Elimination of hidden dangers with strict factory inspectation and traceability system.
3)Providing logistics information.
4)Free guidance on the preparation of equipment foundation.
5)Free guidance for installation and commissioning.
6) Free professional technical training.
3. After-sale.
1)Guidance on various powder production process for customer.
2)Periodic follow-up on device usage.
3)Instructions on equipment maintenance.
4)Solution of relevant problems in the shortest time.
5)Timely and efficient replacement of spare parts.
6)Professional and fast equipment maintenance.
Audited Supplier 
){kind=link}
){kind=link}