The process flow of gypsum vertical mill as a production equipment
for building gypsum powder is: beneficiation → crushing (jaw
breaking) → grinding dehydration → aging → packaging. This process
involves the grinding and dehydration of gypsum in the same gypsum
vertical mill equipment. The dehydration speed is fast and can be
completed in a few seconds. The process is simple, requires less
land, saves investment, and has low production energy consumption,
high automation, and stable product quality. On the basis of
digesting and absorbing advanced foreign technology, our company
has designed and manufactured HVM gypsum vertical mill suitable for
this production process, and has successfully put it into
operation.
The main structure of the HVM gypsum vertical mill is composed of a
separator, grinding rollers, grinding discs, pressurization
devices, motors, reducers, shells, etc. The separator is an
important component to ensure the fineness of the product,
consisting of a speed regulator, motor, reducer, housing, air
outlet, etc; Grinding roller is the main component for rolling
materials, consisting of roller sleeve, roller core, shaft,
bearings, etc; The grinding disc is fixed on the output shaft of
the reducer, and there is an annular groove on the grinding disc,
which is the rolling groove for grinding materials; The
pressurization device is an important component that provides
grinding pressure, consisting of a high-pressure oil station,
hydraulic cylinder, pull rod, accumulator, etc; The reducer plays a
role in reducing speed, transmitting power, and driving the
grinding disc to rotate.
Working principle: The electric motor drives the grinding disc to rotate through a
reducer, and the material falls into the center of the grinding
disc from the feeding port. At the same time, hot air enters the
grinding chamber from the air inlet. Under the action of
centrifugal force, the material moves towards the edge of the
grinding disc and is crushed by the grinding roller when passing
through the circular groove on the grinding disc. The crushed
material is carried up by the high-speed airflow at the edge of the
grinding disc, and large particles directly fall onto the grinding
disc for re grinding. When the material in the airflow passes
through the dynamic and static separator, under the action of the
rotating rotor, the coarse powder falls onto the grinding disc for
re grinding, and qualified fine powder is discharged with the
airflow, Collect in the powder collection device, which is the
product. Materials containing moisture are dried during contact
with hot gases to achieve the required product moisture.
Specifications And Technical Parameters Of HVM Gypsum Vertical Mill
| Model | HVM2500 | HVM2800 | HVM3400 | HVM3700 | HVM4200 | HVM4500 | HVM4800 | HVM5100 | HVM5600 |
| Grinding Table Median Diameter(mm) | 2500 | 2800 | 3400 | 3700 | 4200 | 4500 | 4800 | 5100 | 5600 |
| Capacity(t/h) | 85-100 | 130-160 | 190-240 | 240-300 | 320-400 | 400-500 | 440-550 | 550-670 | 600-730 |
| Raw Material Moisture | ＜10% |
| Raw Meal Fineness | R0.08＜12% | R0.08＜14% |
| Raw Meal Moistrue | ≤1% |
| Main Motor Power(kW) | 800/900 | 1120/1250 | 1800/2000 | 2500/2800 | 3150/3350 | 3800/4200 | 4200/4500 | 5000/5400 | 5600/6000 |
| Illustrate | Re:Raw materials bond index≤13kWh/t | |
Advantages of HVM gypsum vertical mill as a production equipment
for building gypsum powder:
① High efficiency of grinding and dehydration. The vertical gypsum
mill uses the principle of material bed grinding to grind
materials, and uses gas transportation to increase the specific
surface area of the finely ground materials. It has sufficient
contact with hot gases. In this thermal dynamic environment, gypsum
fine powder is easily dehydrated quickly and thoroughly.
② Uniform particle grading, product three-phase (soluble anhydrous
gypsum β The proportion of semi hydrated gypsum and residual
dihydrate gypsum is stable. The material only stays in the mill for
2-3 minutes, while the rotary kiln or frying pan takes 10-20
minutes.
③ The process is simple and the building area is small. During the
operation of the vertical gypsum mill, high-temperature hot air is
introduced, and the materials are ground fine while being
dehydrated and dried. Dust containing gases can directly enter the
high-temperature resistant bag dust collector and be collected as
products. Therefore, the process flow is simple and the layout is
compact, which is about 20% to 30% of the construction area of the
same production scale using rotary kilns or frying pans.
④ Low noise, low dust, high automation level, and high operation
rate.
⑤ Low investment and quick results.
