Feed size: 0–400 mm Handling capacity: configured according to process conditions Suitable materials: iron ore, copper ore, gold ore and other metal ores, as well as materials used in building materials and refractory industries
The MZS semi-autogenous mill is a type of a semi self-grinding ball mill with grinding efficiency that exploits the ore itself as the leading media of grinding. As the drum runs, huge pieces of ore get crushed and ground within the machine via impact and abrasion without the need to supplement with huge quantity of balls of steel as the main grinding means. This type of equipment is particularly appropriate for extensive continuous mining jobs and enables simpler crushing and grinding circuit by reducing the need for media.
Not every large mine is suitable for an autogenous or semi-autogenous process. These machines usually show clear advantages when the mine has the following characteristics:
Large ore throughput that requires long continuous operation.
Relatively coarse feed size and a desire to reduce the number of crushing stages.
Ore with good self-grinding properties.
A goal to lower steel ball consumption and simplify the process flow.
Today, the Chinese sag mill and semi-autogenous mill are widely used in large iron ore, copper ore and gold ore projects.
The MZS sag mill mainly consists of a rotating drum, drive system, lubrication system and control system.
When the machine runs, the drum keeps turning:
Ore is lifted to the upper part of the drum.
Large pieces fall under gravity and break by impact.
Medium and small particles grind against each other.
Material that reaches the required size leaves through the discharge end.
The whole process does not rely on external grinding media for the main size-reduction work.
Model | Cylinder diameter | Shell length | Max feeding size | Output | Main motor | Lubricating station | Remark | |||
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| Model | Power | Speed | Voltage |
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MZS 2409 | 2400 | 900 | ≤250 | Based on working conditions | Z-111 | 55 | 600 | 220 | 16 | — |
MZS 4014 | 4000 | 1400 | <350 |
| JR138-8 | 245 | 735 | 380 | 35 | — |
MZS 5518 | 5500 | 1800 | <400 |
| TDMK800-36 | 800 | 167 | 3000/6000 | 50 | — |
MZS 6030 | 6000 | 3000 | <400 |
| TM1250-14/1730 | 1250 | 428.5 | 6000 | 100 | — |
MZS 7525 | 7500 | 2500 | <400 |
| TM2500-16/2150 | 2500 | 375 | 6000 | 100 | — |
MZS 7528 | 7500 | 2800 | <400 |
| TM2500-16/2150 | 2500 | 375 | 6000 | 100 | — |
The Sag mill is capable of accepting raw ore up to 300–400 mm and thereby cuts down on a number of stages of crushing required in the traditional setup.
The Sag mill relies primarily on impact of ore in itself to carry out size reduction, so steel balls required are only few. This leads to significant saving in the cost of purchase, replacement, and handling of grinding media.
The machine operates with the support of an automatic control system which continuously surveil the running of the equipment and enables the operators to change the parameters of the Sag mill according to their need, thereby making the daily process much smoother.
By using relatively large ore a single grinding stage can handle crushing and grinding, which is a perfect configuration for high-capacity mining operations.
Different mines produce ore with varying hardness, moisture content and particle size. Sanland prepares a grinding system design solution based on each mine’s ore parameters, the volume of process and the grinding level desired as well as site characteristics.
We help customers by delivering a detailed analysis of the feasibility of the proposed grinding system. Our range of services includes not only equipment specification and grinding flow configuration but also planning and layout for the automatic controls, and the supporting equipment.
To make a selection for a grinding system that will exactly correspond to their plant operation and production level, the customers are given all necessary technical and operational details.
To ensure reliable performance and long-time service:
Carry out periodic inspection of the drum liner wear and replace if necessary.
Make sure that lubrication system is working normally and closely watch oil temperature and pressure levels.
Maintain condition checks on both motor and electrical control system.
Operating above the designed load level or feed fluctuation should be avoided.
Following these tips helps reduce unexpected stoppages and extend the life of the machinery.
The MZS semi-autogenous mill can be fitted with a PLC automatic control system that monitors and adjusts running parameters.
When the system detects abnormal load or tramp metal, the protection system reduces the risk of impact damage. A hydraulic protection device releases abnormal pressure so that uncrushable material can be discharged quickly, protecting the machine from damage.
Established in 1988 in Shenyang, China, Sanland manufactures crushing, screening, mineral processing and material handling equipment.
Our 95,000 m² facilities in Shenyang and Kaiyuan, staffed by over 350 people, handle the full production process in-house — casting, machining, welding, assembly and testing — ensuring strict quality control from start to finish.
In 30+ years we have built more than 110 crushing production lines globally (100–3,000 t/h) and also provide custom equipment, plant upgrades, process design, installation, commissioning and technical support.
Equipment is working in mining, quarrying and aggregate projects across 60+ countries, including Chile, Peru, Australia, Saudi Arabia, Russia and Southeast Asia. Customers include BHP, Vale, CODELCO, Anglo American, ANSTEEL, Philex Mining, China Gold and Huaxin Cement.
A service centre in Ontario, Canada, with local engineers and a 3,000 m² parts warehouse, delivers installation support, troubleshooting, spares and after-sales service.
Possessed of a comprehensive global service network, Sanland offers to overseas customers, pre-sale services such as process design, equipment recommendation and technical planning. Once a product is delivered, customers get installation support, startup commissioning, operating staff and technicians training, and remote troubleshooting.
We also manage customer service from Canada where we have a service depot and spare-parts store for efficient localized customer care.
If it is a large mining machine, we have expertise in handling such cases. Packaging to international export standards and providing transportation for a very large item will be arranged, including monitoring the movement of packages and being at your site to help with the off-loading.
Whether you require an individual machine or a full grinding system package, we can tailor the solution to suit your project requirements.
1.2 million t/a copper mine integrated project in Chile Location: Chile Industry: Copper mining Material: Copper ore
This is a large integrated copper mining and processing project with an annual capacity of 1.2 million tons of ore. Sanland took part in the process design and supplied crushing and grinding equipment, including the MZS5518 Sag mill.
The machine is used in the ore grinding stage, meets the continuous production requirements of the project, and provides a stable grinding solution for the customer.
Q: What is the difference between an autogenous mill and a semi-autogenous mill? A: An autogenous mill mainly relies on the ore itself for grinding. A semi-autogenous mill (SAG Mill) adds a certain proportion of steel balls to help improve capacity and grinding performance.
Q: How does the tramp-metal protection system work? A: When the system detects abnormal load, the hydraulic protection device releases pressure, adjusts the support structure and enlarges the discharge space so that uncrushable material can leave the machine, reducing the risk of damage.
Q: What certifications does the company hold? A: The company holds ISO 14001 Environmental Management System Certification, ISO 45001 Occupational Health and Safety Management System Certification, multiple AAA-level enterprise credit certifications, invention patents and intellectual property certificates. Additional certifications can be provided according to market requirements.
The MZS sag mill, Sag mill, Chinese sag mill, MZS semi-autogenous mill and Semi-autogenous mill range gives large mines a practical way to simplify the grinding process, cut steel ball consumption and keep continuous production running more smoothly.
We are a professional manufacturer of mining machinery, specializing in the R&D and production of cone crushers, jaw crushers, and other mining crushing equipment. All equipment is manufactured and quality-controlled within our own production system, allowing us to directly address customer requirements and minimize intermediate links.
Yes. Our products can be supplied with internationally recognized certifications such as CE upon customer request. Our production processes strictly comply with quality management system requirements, ensuring that all equipment meets applicable safety and performance standards for export markets.
For standard models, we typically maintain a stable production cycle and complete delivery within 30 days. For customized configurations or special operating conditions, the lead time will be confirmed based on the specific solution. A clear production and delivery schedule will be provided upon order confirmation.
For complete machinery, the MOQ is generally one unit. For wear parts and accessories, the MOQ can be confirmed based on the specific model and requirements—please feel free to consult us for details.
Prior to shipment, all equipment undergoes anti-rust and anti-moisture treatment. We typically adopt wooden crates or reinforced packaging to ensure safe delivery during long-distance sea or land transportation.
We offer flexible shipping solutions including sea freight, land transportation, or multimodal transport, and we cooperate with customers or their designated freight forwarders to manage container loading and dispatch arrangements.
We generally support commonly used international payment methods such as T/T (telegraphic transfer). Specific payment terms can be negotiated based on the order value and cooperation circumstances.
Yes. We offer customized production and OEM services to meet specific customer requirements, including adjustments to equipment structure, technical parameters, and logo/branding customization.
Prior to order confirmation, we can provide product specifications, technical descriptions, application recommendations, and relevant images or documentation to help customers gain a thorough understanding of equipment performance and make informed procurement decisions.
