Recently, the main equipment has been successively delivered to the site of a 1,700t/h limestone mine comprehensive development and utilization project in Zhuji, for which Allis Saga is supplying a complete set of crushing and screening equipment.

3 units of VSI9100 Vertical Shaft Impact Crushers

2 units of MS600C Cone Crushers and 4 units of MH600M Cone Crusher

Project Site

 01 Project Background 

- Total planned investment: RMB 600 million

- Land occupation: 385.6 mu of forest land (for the entire project) and 173 mu of land for production lines and supporting facilities

- Planned construction period: 10 months

- Scheduled commissioning: This year

- Mine resource reserves: 8.4506 million cubic meters (22.9066 million tons)

- Production line capacity: 1,700 t/h

As the largest construction stone mine project in Shaoxing in terms of current reserves and planned production capacity, it is planned to be built into a high-quality and high-standard benchmark mine.

02 Project Overview

- Scheduled Commissioning Time: 2021

- Project Capacity: 1,700 t/h

- Rock Type: Limestone

- Product Size: 26.5-31.5mm, 19-26.5mm, 10-19mm, 5-10mm, 3-5mm, 0.075-3mm, ＜0.075mm (Optional: 5mm-16mm and 16mm-31.5mm)

- Equipment Configuration: A total of 27 sets of complete crushing and screening equipment, including 2 units of FD1860 grizzly feeders, 1 unit of CS3070D circular vibrating screen, 2 units of CS3680T circular vibrating screens, 8 units of CS3080T circular vibrating screens, 3 units of MHFS2618 high-frequency screens, 2 units of MJC1612 jaw crushers, 2 units of MS600C secondary cone crushers, 4 units of MH600M tertiary cone crushers, and 3 units of VSI9100 vertical shaft impact crushers.

03 Production Process

①Raw materials are transported by dump trucks and unloaded onto the discharge platform, then pre-screened by FD1860 grizzly feeders. Materials smaller than 200mm are conveyed to the CS3070D circular vibrating screen via belt conveyors. After screening by the CS3070D:

- Materials of 10-200mm are combined with the discharge from the jaw crusher and conveyed to the semi-finished product pile;

- Materials of 0-10mm are conveyed to the waste pile;

- Materials larger than 200mm are fed into the MJC1612 jaw crusher for primary crushing, and then conveyed to the semi-finished product pile.

② Semi-finished products are conveyed to the MS600C secondary cone crusher. After crushing, the materials are conveyed to the CS3680T circular vibrating screens in the first and second screening workshops:

- Materials larger than 31.5mm from the upper layer are conveyed to the MH600M tertiary cone crusher;

- Materials of 5-26.5mm from the lower layer are conveyed to the shaping and sand-making workshop, along with materials of 0-5mm.

③Materials crushed by the MH600M tertiary cone crusher are conveyed to the CS3080T circular vibrating screens in the first and second screening workshops. After inspection and screening:

- Materials larger than 31.5mm from the upper layer are conveyed back to the tertiary cone crusher to form a closed circuit;

- Materials of 26.5-31.5mm from the middle layer are combined with the 26.5-31.5mm materials from the middle layer of the CS3680T circular vibrating screen and conveyed to the finished product pile;

- Materials of 5-26.5mm from the lower layer are conveyed to the shaping and sand-making workshop, along with materials of 0-5mm.

④Materials crushed by the VSI9100 vertical shaft impact crusher are conveyed to the CS3080T circular vibrating screen in the third screening workshop:

- Finished products of 19-26.5mm are separated from the upper layer;

- Finished products of 10-19mm are separated from the middle layer;

- Finished products of 5-10mm and materials of 0-5mm are separated from the lower layer.

⑤The 0-5mm materials separated from the first and second screening workshops (both sections) are split into 0-0.075mm and 0.075-5mm fractions by an air classifier. The 0.075-5mm materials are further separated into two products (0.075-3mm and 3-5mm) by the MHFS2618 high-frequency screens.

- (Note: This production line can optionally produce 5mm-16mm and 16mm-31.5mm products)

04 Production Line Advantages

• Adopts a four-stage crushing and two-closed-circuit process. Equipped with intelligent mainframe equipment, it enables simultaneous production of multiple products with adjustable proportions, flexibly meeting market demands;
• Utilizes laminated crushing equipment, which balances equipment load, saves energy, protects the environment, prevents over‑crushing, and achieves high‑efficiency resource utilization;
• Features a reasonable crushing ratio for smooth feeding and prevention of material bridging; implements a "screen more, crush less" principle for timely discharge, fully leveraging the production capacity of the line.

 05 Equipment Overview

·MS/MH600 Cone Crusher·

Allis Saga’s MH/MS series cone crushers are mainly used for secondary crushing, fine crushing, and ultra-fine crushing in mining, construction (aggregates), and industrial (slag, etc.) applications.

They are suitable for processing materials ranging from relatively brittle limestone to extremely hard chert, and from relatively coarse ballast to finer manufactured sand. Whether for fixed crushing or mobile crushing plants in metal mines, and for applications from conventional crushing to autogenous mill pebble crushing, the MS & MH series cone crushers deliver exceptional performance in secondary, fine, and ultra-fine crushing operations.

Featuring a single-cylinder hydraulic design, the MH and MS cone crushers are simple, reliable, efficient, and fully automatic. They feature easy operation and maintenance, lower operating costs, and superior crushed product quality, making them highly adaptable to a wide range of crushing conditions.

### Spindle Material and Manufacturing Process

- Forged from high-quality alloy steel, all forgings meet UT-1 and MT-1 standards.

### Upper and Lower Frame Structure

- Frame structure optimized through finite element analysis to ensure high strength;

- Circumferential and longitudinal rib plates significantly enhance frame rigidity, reducing the risk of cracking.

### Upper and Lower Frame Casting

Casting process designed using advanced German MAGMA simulation software, enabling real-time casting simulation and optimization to ensure casting quality.

### Oil Station Design

- Key components adopt international brand products;

- Horizontal installation of the oil pump unit expands the internal space of the oil tank;

- Facilitates maintenance and servicing for operators;

- Suitable for stationary crushers;

- Compact design;

- PLC-controlled oil station system for mobile crushing plants.

### Intelligent Control 

- Windows-based platform with user-friendly HMI;

- Automatic discharge opening adjustment and real-time operating status monitoring, facilitating communication with the customer’s central control system;

- Stores historical data up to15 days, facilitating download and long-term retention;

- Supports remote technical support.

·VSI9100 Vertical Shaft Impact Crusher·

Allis Saga’s VSI series sand making machines are mainly used in tertiary or quaternary crushing processes.Combining crushing and grinding functions, they can process almost all abrasive, brittle, or viscous materials.

- Adopts the "rock-on-rock" crushing technology, combining high-speed impact crushing with high-pressure grinding to enhance crushing efficiency;

- Key components are lined with rock materials, ensuring that crushing primarily occurs between rocks;

- The rotor is made of special materials, ensuring low wear.

Therefore, unlike many other impact crushers, Allis Saga’s VSI series offers the advantage of low production costs, making it an excellent choice for sand making and aggregate shaping.

### Rotor 

- Equipped with primary and secondary rotor tips and a three-channel design, balancing rotor service life and material throwing efficiency;

- Modular structure enables quick and easy replacement of wear parts;

- Tungsten alloy material combined with hardfacing treatment provides comprehensive wear protection, extending rotor service life.

### Crushing Chamber

- Optimized chamber geometry to maximize material kinetic energy utilization;

- Circulating air flow design effectively controls dust emission;

- Material accumulation design ensures efficient crushing and wear resistance.

### Feeding System

- Adjustable overflow rate to accommodate different material characteristics and product requirements;

- Adjustable rotor feeding capacity to ensure continuous full-load feeding;

- Centered and uniform feeding design ensures consistent and stable particle size distribution.

### Pulley

- Rotor speed can be adjusted by changing pulleys, facilitating switching between aggregate shaping and sand making operations;

- Belt tension can be adjusted via hydraulic cylinders.

### Grease Lubrication (Optional)

- Independent lubrication system keeps grease clean and extends bearing service life;

- 3 grease nipples with independent flow distribution valves ensure lubrication effectiveness;

- Dry grease lubrication offers greater economy and environmental friendliness.

### Oil Lubrication (Optional)

- Oil lubrication, more suitable for heavy-duty working conditions such as sand making;

- Independent lubrication system with filtration, cooling, and heating devices;

- Safe, reliable, and low operating costs.