Ball mill

Ball mill

Application: Calcium carbonate grinding processing, gypsum powder processing, power plant desulfurization, non-metallic mineral milling, pulverized coal preparation

Applicable materials: limestone, calcite, calcium carbonate, dolomite, barite, talc, gypsum, diabase, quartz, bentonite, etc.

Feed grain size: ≤ 30mm

Production capacity: 8-176 tons / day

Ball mill SBM production of early, mature products. Ball mill is a crushing equipment that can grind a variety of materials, such as feldspar, quartz, clay, cement, refractory, chemical, non-ferrous and ferrous metals. Including energy-saving ball mill, cement ball mill, lattice ball mill, ceramic ball mill, intermittent ball mill, rod mill, coal mill and so on.

Ball mill technology innovation

Over the years, ball mill technology has been undergoing innovations to adapt to the new market demand, environmental protection and energy saving has almost become the trend of all mining machinery technology innovation. In this era of background, SBM actively carry out technological innovation and transformation of enterprises, professional engineers and technicians also accumulated experience and based on the diligent study, the technical innovation of the Division, making the ball mill equipment more efficient , Energy saving and environmental protection.

Ball mill production line optimization

Years of market testing, SBM ball mill outstanding advantages. Reliable performance, with good wear resistance, fineness in the 800 mesh, can be adjusted as needed. With the application of mineral processing equipment, a reasonable allocation of ball mill production line is even more important. After SBM optimized ball mill production line can be based on the different materials, the actual adjustment. Users can not grasp the details of the process, you can contact SBM, a professional engineering and technical personnel for your tailor-made affordable ball mill production lines and facilities.

Ball mill structure and work flow

Ball mill is composed of horizontal cylinder, hollow shaft and grinding head, feeding section, discharging section, rotating section, transmission section (reducer, small transmission gear, motor, electric control) and other major components. The hollow shaft is made of steel castings, the inner liner is removable, the rotary gear is machined by casting hobbing, and the cylinder body is provided with a wear-resistant lining plate, which has good abrasion resistance. Its cylinder body is lined with a lining made of wear-resistant material, a bearing which carries the cylinder body and keeps its rotation, and a driving part such as a motor, a transmission gear, a pulley and a V-belt.

According to the particle size of the grinding material to be selected, the material is loaded into the barrel by the hollow shaft of the feeding end of the ball mill. When the barrel rotates, the grinding body is attached to the barrel liner due to the effect of inertia and centrifugal force and friction Was taken away by the cylinder, when brought to a certain height, was dropped due to its own gravitational force, and the falling abrasive body crushed the material in the cylinder like a projectile.

Ball mill

Cylinder in the process of rotation, the grinding body also slipped phenomenon, in the process of sliding to the material to the grinding effect, in order to effectively use the grinding effect on the material size teach the general 20 mesh grinding time, the grinding barrel Separated by partition board into two sections, that is, as a double warehouse, the material into the first warehouse when the ball crushed, the material into the second warehouse when the steel section of the material grinding, grinding qualified material from the hollow side of the discharge When the material discharged into the shaft is ground, the material such as sand No. 2 slag, coarse fly ash and mill cylinder may not be provided with a partition plate when the materials with small feed particles are ground. The mill body can also be used with steel segments. The raw material is fed into the hollow cylinder through hollow journals and ground. The cylinder contains grinding media of various diameters (steel balls, steel rods or gravel, etc.). When the cylinder revolves around the horizontal axis at a certain speed, the medium and the raw materials installed in the cylinder under the action of centrifugal force and frictional force, as the cylinder reaches a certain height, when its own gravity is greater than the centrifugal force, Projection of body wall drop or roll down, due to the impact of crushing ore. At the same time in the mill rotation process, the sliding movement of the grinding media on the raw materials also have a grinding effect. The ground material is discharged through the hollow shaft.

The common type of ball mill and a brief introduction

Ball mill is widely used in industrial production of high fine grinding machinery, many types, according to different circumstances, the type of ball mill is different. When it is used to grind all kinds of ore and other materials, it is widely used in the industries of mineral processing, building material and chemical industry. It can be divided into dry type and wet type. According to different drainage methods, can be divided into grid-type and overflow type. According to the shape of the barrel can be divided into short tube, tube, tube mill and cone mill four. SBM describes the types and properties of several common ball mills.

  • Ceramic mill (ceramic ball mill)
  • Ceramic mill, ceramic ball mill, is the ball mill liner is made of ceramic and ceramic ball mill. Ceramic ball mill is a new type of energy-saving ball mill developed by the domestic mineral processing machinery experts combined with the domestic content of new ball mill technology. Its capacity is very small, and it is generally suitable for intermittent small batch production of product trial.

    Ceramic ball mill is mainly used for material mixing, grinding, product fineness uniformity, saving power; either dry or wet grinding. The machine can be based on the production needs of different liner types to meet different needs. The structure of the ceramic mill can be divided into integral and independent type, it compared with other ball mill saving time, easy to operate, the performance is more stable and reliable.

  • Cement ball mill
  • Cement ball mill for the horizontal cylindrical rotating device, external gear drive. Cement ball mill rotating cylinder centrifugal force will be brought to a certain height after falling. Cement ball mill for cement products and cement raw materials grinding, also known as cement mill or raw mill, which is divided into two kinds of dry and wet methods.

  • Energy-saving ball mill
  • Energy-saving ball mill when using a new energy-saving ball mill. Widely used in black, non-ferrous metal mining, non-metallic mining, building materials, chemicals, electricity, coal, transportation, light industry and other sectors. SBM company's energy efficient ball mill bearings are rolling bearings instead of bearing plain bearings. Energy-saving ball mill with sliding bearing support compared with energy-saving 10-20%. In the case of the same power, with the production capacity increased by 10-20%.

  • Lattice ball mill
  • Lattice ball mill at the end of its drainage with a hollow shaft end caps, with bearing sleeve and mine plaid used to grind various ores and other materials, is widely used in mineral processing, construction and chemical industry Various departments of the national economy.

    Grinding ball mill for fine grinding effect is better than coarse grinding, fine grinding, the general size of the ore should not be greater than 65mm, suitable to the ore particle size is below 6mm.

  • Intermittent ball mill
  • Intermittent ball mill, also known as disposable feeding machine, intermittent ball mill SBM company ball mill products for mixing, grinding, product fineness, energy-saving power. Can be dry, but also wet grinding.

    Intermittent ball mill from the feeding department, the Department of discharge, the Ministry of rotation, the Department of transmission (reducer, a small transmission gear, electrical, electronic control) and other major components. The hollow shaft is made of steel castings, the inner liner is removable, the rotary gear is machined by casting hobbing, and the cylinder body is provided with a wear-resistant lining plate, which has good abrasion resistance. The machine runs smoothly, reliable work.

    Note: According to the material and drainage methods, choose dry ball mill and wet lattice ball mill.

    Intermittent ball mill with less investment, energy saving than similar products, novel structure, easy operation, safe use, stable and reliable performance, suitable for ordinary and special materials mixing and grinding operations.

  • Rod mill
  • The rod mill is named after the grinding body loaded in the barrel of the ball mill for a steel rod and is hereinafter referred to as a rod mill. It is generally used wet overflow type, used as an open-ground grinding, widely used in artificial stone, ore dressing plant, chemical power plant level grinding.

    Rod mill is a rod mill motor through the reducer and the surrounding gear slowdown drive or by the low-speed synchronous motor directly through the peripheral gear reducer drive cylinder rotation to complete the rod mill grinding process. Rod mill types are more, for example, SBM mill produced and so on.

What is the filling rate of the ball mill?

Filling rate refers to the volume of material in the ball mill equipment account for the effective volume of the mill volume percentage, sometimes with the material that means the mill material level. Material level can be converted to fill the size of the rate. The size of the filling rate reflects the ball mill feed rate, abrasive speed and discharge speed of the three balance of the results. In the nature of the ore, the mill structure of the established conditions, the level of material level is the main factor affecting the abrasive speed. Experiments show that ball dynamic ball dynamic ball filling rate of 35%, 42% and 50% of the state of the ball trajectory. Drop off, drop down smashing speed and operating load and other physical and mathematical analysis and calculation. It is demonstrated that the grinding capacity increases greatly with the increase of the comprehensive filling rate of the steel ball. The load is the largest under the condition of 45% of the rated steel ball packing rate (equivalent to 42% of the dynamic steel ball packing ratio) But declined. If the mill to speed up and out of feeding device to improve the comprehensive ball filling rate to the best, so that the moment of impact load 0, or even into a power, will greatly improve mill production capacity, energy saving. So, what to do is to have a degree, put more not work, put less will not work, like the ball mill filling rate is the same, more will affect the output less, how to improve the ball mill production capacity, and reduce consumption It is our intention to study and care.

Ball mill

Ball mill routine maintenance and operation precautions

1, the two bearing base on the same surface in the same level, the center spacing tolerance 1mm, longitudinal center line unevenness deviation of 0.5mm, transverse line center line deviation of 0.5mm per meter.

2, tile base spherical contact surface should be uniform; each 50 × 50mm2 no less than 1-2 points; hollow shaft and tile contact surface should be 90 ° - 100 ° per square inch of not less than 2 points, journal and The clearance on both sides of the bearing is approximately the same.

3, the cylinder flange and the front end of the mating surface should ensure good contact, not allowed to add gasket, two hollow shaft tolerance of less than 0.8mm. Large ring gear and cylinder end cap in the connection assembly correction, should be firmly thrust, good positioning pin, ring gear radial swing is not greater than 0.5mm, axial swing is not greater than 0.84mm.

4, the liner should be installed when the installation of end caps, cylinder liner should start from the population, according to the assembly requirements, the screws should be tightened, not leaking. Rubber liner with no gap, there are gaps at the use of sponge to block.

5, pinion centerline and large gear center line to be parallel, the deviation of not more than 0.2mm per meter. Tooth top clearance 1/4 modulus, tooth-side clearance 1.06 ----- 1.8mm, tooth surface contact area of ​​not less than 50% of tooth length, tooth height 40%.

6, reducer, motor and drive shaft drive coupling should maintain a high coaxial, the center line of different degrees of friction is not greater than 0.3mm, the center line tilt is less than 1/1000.

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