Ball mill, an energy-saving grinding device, is widely used in mineral processing, building materials and chemical industries.Itgrinds material by rotating a cylinder with steel grinding balls, causing the balls to fall back into the cylinder and onto the material to be ground.The rotation is usually between 4 to 20 revolutions per minute, depending upon the diameter of the ball mill machine.The larger the diameter is, the slower the rotation is.If the peripheral speed of the ball grinding mill is too great, it begins to act like a centrifuge and the balls do not fall back, but stay on the perimeter of the mill.
Before going to the customers, however, the clinker is put into a tube or ball mill.The ball mill is basically a large rotating drum filled with steel balls of different sizes.The size of the balls depends on the desired fineness of the cement powder.They basically crush and grind the clinker into the desired fineness.
The strommashina plant manufactures reliable rod mills designed for long-term fault-free operation.The rod mill is grinding equipment, it is a milling device used for coarse grinding (up to 500 to 1000 mm) of the concentrating raw material before the finish grinding in the ball mills.
Ball mill power is relatively large, the appropriate choice of hydrostatic sliding bearing.The main bearing bush is lined with babbitt alloy bush, each bush has two high-pressure oil chambers, high-pressure oil has been supplied to the oil chamber before and during the operation of the mill, the high-pressure oil enters the oil chamber through the shunting motor, and the static pressure oil film is compensated automatically to ensure the same oil film thickness to provide a continuous static pressure oil film for mill operation, to ensure that the journal and the bearing bush are completely out of contact, thus greatly reducing the mill start-up load, and can reduce the impact on the mill transmission part, but also can avoid the abrasion of the bearing bush, the service life of the bearing bush is prolonged.The pressure indication of the high pressure oil circuit can be used to reflect the load of the mill indirectly.When the mill stops running, the high pressure oil will float the journal, and the journal will stop gradually in the bush, so that the bush will not be abraded.Each main bearing is equipped with two temperature probe, dynamic monitoring of the bearing bush temperature, when the temperature is greater than the specified temperature value, it can automatically alarm and stop grinding.In order to compensate for the change of the mill length due to temperature, there is a gap between the hollow journal at the feeding end and the bearing bush width, which allows the journal to move axially on the bearing bush.The two ends of the main bearing are sealed in an annular way and filled with grease through the lubricating oil pipe to prevent the leakage of the lubricating oil and the entry of dust.
Unused- patterson industries 5' diameter x 6' long ball mill, type d, non-jacketed, with ar400 steel liners.Includes 30 hp, 3 phase, 60 hz, 230-460 v, 1725 rpm motor.Mill drive is integrally coupled to horizontal parallel shafted helical gear reducer.Continuous type, with product feeding through spiral inlet trunnion and exiting through the discharge end trunnion.Features cylinder manway access door for cleaning.Internal volume measures approximately 839 usg (112 cf).Mill shell is lined with (24) 1/4" thick liner plates, each head lined with (8) 3/8" thick pie-shaped liner plates.Mounted on stand with approximately 66" clearance between the mill cylinder and floor.Mills were intended for use in glass particle size reduction but were never installed.Manufactured in 2019, unit still in factory plastic wrap.
\ critical speed_ when the ball mill cylinder is rotated, there is no relative slip between the grinding medium and the cylinder wall, and it just starts to run in a state of rotation with the cylinder of the mill.This instantaneous speed of the mill is as follows: n0 - mill working speed, r/min; kb speed ratio, %.There are many layers of grinding media in the mill barrel.It is assumed that the media will be concentrated in one layer, called the polycondensation layer, so that the grinding media of this layer will be in the maximum drop, i.E.The calculating speed of the mill when the total impact energy is the largest nj.Therefore, it is theoretically deduced that the reasonable working speed is the working speeds of various mills are shown in table 1-10.Table 1-10 working speeds of various mills.
Therefore, the ball mill length shall be designed appropriately, so is the diameter.In this way, the ball mill efficiency is improved with an appropriate crushing and energy consumption.
Impact crushing machine, the body and cover part of the machinethe body and machine is uses the steel plate cover a welding, body and cover ground chain by machine, with chain hoist can flip open.When need to replace hammer rings parts, first with the bolt on to unloadball mill, dozen boot cover, the machine can flip cover 90 degrees.As shown in figure a, from the ring on the lower down on the axis of the elastic pin or hole with block circle,rock crusher spare ring shaft, can replace ring hammer, etc.
The ball mill can be used to grind the fine aggregate again.The crushed aggregate is divided into high-quality recycled aggregate of 5-20 mm by secondary screening, which can be used in the concrete manufacturing of c25-c30.The high-quality recycled fine aggregate of 0.15 mm-5 mm and the fine powder of 0.15 mm or less are selected by tertiary screening.
This equipment is the key equipment for re-grinding materials after the primary crushing.The application is quite wide such as cement, silicate, products, new building material, refractory material, chemical fertilizer, black and non-ferrous metal beneficiation and grass-ceramic industries.It can be used to wet grinding or dry grinding various ores and other grind able materials.According to the material and ore discharge pattern, the vertical raymond mill equipment can be chosen as wet type grid ball mill equipment and dry type grid ball grinder equipment.
The grinding ore will be discharge through the discharge port, and then the discharged mineral will be classified into the qualified product in a spiral classifier, with the coarse sand being returned to the ball mill through the combined feeder to continue grinding.
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