Ambattur Industrial Estate, Chennai No. 61/A30 Vanagaram Road, Athipet, Ambattur Chennai Chennai Vanagaram Road, Ambattur, Athipet, Ambattur Industrial Estate, Chennai - 600058, Dist. Chennai, Tamil Nadu
Ball mill is the key equipment for secondary grinding after crushing. And it is suitable for grinding all kinds of ores and other materials, no matter wet grinding or dry grinding. Besides, it is mainly applied in many industries, such as ferrous&non-ferrous metal mine, coal, traffic, light industry, etc.
The Ball mill can be divided into lattice type and overflow type according to different beneficiation methods, and this machine is two lattice-type ball mill. The materials from the feeding fittings enter the first bin of the milling machine via the feeding hollow axis evenly when it works. There is a ladder-like or ripple-like scaleboard in the first bin, and different specification steel balls are installed in the bin. When the cylinder rotates, which generating centrifugal force to carries steel balls to a certain height and then balls fall to strike and grind the material. After primary grinding in the first bin, the material then enters into the second bin via a single layer partition board. There is a scaleboard and steel balls in the second bin, so the materials are further ground. In the end, the powder is discharged by output material board.
The processing of ground calcium carbonate is simply the process of using crushing and grinding equipment to process calcium carbonate minerals into various powders that can meet the requirements of industrial applications. Because different industrial applications have different requirements on the particle size, shape, whiteness and particle size distribution of ground calcium carbonate powder, the processing technology of ground calcium carbonate should also comprehensively consider the process route and equipment selection according to the product positioning. Generally speaking, the design of grinding equipment is based on different principles: impact, extrusion, friction, shear and combination of various forces, etc. Different designs will have different grinding effects and product fineness.
The common processing equipment of ground calcium carbonate produced by large-scale dry process includes Raymond mill, Vertical mill, Ring roller mill and Ball mill. Due to the different crushing principle and discharging method of the equipment, the processed powder has great differences in grain type, particle size distribution and unit energy consumption, so the positioning of the product also has obvious differences.
The ball mill can cooperate with the air classifier to form a closed-circuit circulation system, after the grading of the coarse powder can be returned to the ball mill for re-grinding, and the Raymond mill, vertical mill, vibration mill due to the capacity of the mill is very limited, return difficult, unable to form a closed-circuit circulation system, to return to the treatment of problems.
The ball mill is also a low speed operating equipment, impact and friction energy consumption to minimize. Therefore, it is not only an ideal choice for grinding high hardness, abrasive mineral raw materials, but also the most economical choice for grinding white filler minerals such as low hardness calcium carbonate.
It can be seen from the particle size distribution map that the particle size distribution of the grinding products of the ball mill is the widest. Through the air classifier, the products with different fineness requirements can be separated. At the same time, the output of the ball mill is large, with scale effect, so it has a strong market adaptability and competitiveness.
The production line adopts the international popular continuous production process: ball mill and air classifier system. The technological process mainly includes crushing (generally using two-stage crushing), grinding, classifying, packaging, magnetic separation, transportation, lifting, etc. After the ball mill can be parallel or series multiple classifier at the same time to produce more than one size of the product.
Working principle: The raw material is fed into the hollow cylinder through the hollow shaft neck for grinding. The cylinder is equipped with grinding media of various diameters (steel ball, steel bar or gravel, etc.). When the cylinder rotates around the horizontal axis at a certain speed, the medium and raw materials in the cylinder under the action of centrifugal force and friction force, as the cylinder reaches a certain height, when its own gravity is greater than the centrifugal force, it will escape from the cylinder body wall and drop or roll down, smashing the ore due to the impact force. At the same time, the sliding motion of the grinding medium also produces grinding effect on the raw material during the rotation of the mill. The ground material is discharged through a hollow journal.
Raymond mill is the earliest and most widely used grinding equipment in China, with low fineness, suitable for the production of 400 mesh of coarse ordinary powder. A small amount of 500 ~ 1250 mesh products can be obtained through secondary classification. Suitable for large scale production of coarse powder and small scale production of fine powder.
Working principle: Raymond mill rollers works under the action of centrifugal force tightly on the ring rolling, the shovel knife scooping up material to the grinding roller and grinding ring in the middle, the material under the action of ground pressure, broken into powder, and then under the action of fan blow into powder material up through analysis of machine, to fulfill the requirements of fineness of materials through the analysis of machine, cant meet the requirements of the return to continue to grinding, grinding chamber through the analysis of the material into the cyclone separation of machine to collect. Use industrial press cloth to separate the air exhaust into powder.
Vertical mill is a typical material layer extrusion crushing equipment, the most fine can reach 1250 mesh, through the second, third classification of the most fine can reach to 3000 mesh, generally suitable for mohs hardness of less than 7 materials.
Working principle: The motor through reducer driven in mill, material from the feed opening fell into a grinding disc, move to the edge of mill under the action of centrifugal force and grinding roller of roller compaction, shredded material from mill edge overflow, at the same time from the nozzle ring (ring) wind speed up stream to efficient separator, which is one with vertical mill meal after separator is returned to the mill wheel, grinding again; The fine powder is ground with the air flow and collected in the dust collecting device of the system, which is the product. Coarse granular materials not taken up by the hot gas flow and accidental entry of metal parts sink from the wind ring, after scraping out by the scraper, through the external circulation of the bucket machine feeding into the grinding again grinding.
As the roller is small and many, the fit clearance with the grinding ring is also small, the most fine grinding can be up to 2500 mesh. Low energy consumption and low fine powder content. Generally suitable for mohs hardness below 5, narrow particle size (low oil absorption value), moderate fineness of materials. But forhard materials, if they are light color (white), the degree of dialogue has a great influence.
Working principle: It adopts the principle of impact, extrusion and grinding to crush the material. There is a large active gap between the grinding ring and pin shaft installed on the grinding ring bracket. When the grinding ring bracket rotates with the spindle, the grinding ring is swung to the grinding ring by centrifugal force, and the inner wall of the grinding ring is pressed and rotates around the pin axis. When the material passes through the gap between the grinding ring and the grinding ring, it is impacted, squeezed and ground by the grinding ring. Under the action of gravity, the crushed material falls into the swing plate and is then thrown into the air flow into the grading chamber for classification. The qualified fine powder is collected through the grading wheel into the rear passage collection system, and the coarse material is thrown into the shunt ring for internal avoidance, and then falls back into the crushing chamber for crushing. The grinding ring is single layer or upper and lower double layer distribution. When the double-layer grinding ring crusher works, the material is crushed again when passing through the gap between the second grinding ring and the grinding ring.
9) Finally, the qualified fine powder pass from the classifier, then to be collected by the cyclone. Meanwhile, the unqualified products will fall back to the main mill for regrinding till be qualified.
HDW Series German type improved grinding mill is widely used in the fields of metallurgy,chemical industrial, electric power, oil, and non-metallic mineral processing, etc. The products are mainly used for industrial desulfurization , the interior and exterior wall coatings of the buildings, plastic rubber filling, paper-making, feed supplement and the recycling of slag.
With scientific & reasonable design and its unique advantages,HD DBMW German Type Fine Grinding Mill are applied widely in power, metallurgical, cement, chemical and non-metallic industry, for grinding of various materials, such as cement raw material, clinker, limestone, slag, manganese, gypsum, coal, barite, calcite etc.. The grinding field is wide and grinding type is abundant.
1.Humidity of grinding materials: from materials ofless than 6 %(such as cement clinker), wide range of materials. 2. Grindability of materials: from high grindability(such as quartz sand, steel slag, mining slag, pyrophyllite, iron ore etc.) to low grindability (such as gypsum, calcite, etc). 3. Fineness of grinding product: from 2-5mm(such as raw shale for making brich in new wall material industry, sand for construction industry, etc) Product fineness is easy to adjust and simple operation
4Possibility of main mill housing been cracked is minimal:HD-DBMW Series German Type Grinding Mill assembled with flexible coupling between housing and main mill.When the main mill works, the housing will have no force and vibration . This can help the housing will be strong enough .
1)New technology structure to protect the center shaft. The framework oil seal is installed with new technology structure to protect the center axis. Thus,the center axis of main mill can withstands even the greatest wear and tear
3)To service the oil seal equipment, workers dont need to disassemble the main mill any more. Workers can replace the oil equipment from the repair tank of the reducer. This can save the equipment maintenance time and labor intensity greatly.
HDW Series German Type Fine Powder Grinding Mill has no return air box and no air duct guard plate structure. And the grinding chamber is full of negative pressure. which makes the powdery material in the sealed grinding chamber to be ground perfectly.
The powdery material is ground in the closed grinding chamber. Then the finished powdery material is pumped to the classifier to be classified by the negative pressure . since there is no positive pressure in the lower part of grinding chamber, the powdery material will no be raised in the grinding chamber due to positive pressure.This ensure the effective grinding of powdery material in the grinding chamber.
There are positive pressure air ducts around the base of traditional domestic mill .This makes the powder easy to raise , resulting in less abrasive fabric surface .Since hard materials have low grind-ability , when the grinding mill works, the equipment will subjected to large impact force, fast loss,large vibration, loud noise,fast loos and low output. Thus,HD-DBMW Series German Type Fine Powder Grinding Mill is designed specifically for the whole powder material and hard material ideal model.
Turbine blades of ultra-fin classifier are vertically embedded in upper and lower panels. The blade will not deform will not deform without welding. With equal blade spacing, high classification accuracy and concentrated particle size distribution, it can separate 325-1250 mesh powdery materials.
The turbine of traditional analyzers is inclined and fixed on the upper and lower panels by welding. Due to the large amount of welding ,the turbine produces welding stress and deformation, the blade spacing is not uniform, and the gas dear formed at the top in the labyrinth groove is easy to cause rough running. In order to avoid coarse running, it is necessary to increase the speed and thus affect the output. The particle size distribution of finished products in scattered, so only 80-400 mesh powdery materials can be sorted.
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Lab roll ball mill is a kind of equipment used for ultra-fine grinding and mixing for laboratory and small batch production. The machine is preferred equipment for scientific research, education, experiment and production due to its advantages such as elegant and fashion design, compact structure, easy operation, high efficiency, and uniform granularity. It is widely applied to industries of electronic material, magnetic material, biological medicine, ceramic glaze, metal powder, nonmetallic minerals, new materials, and etc.
When mill works, the grinding media and the materials inside the tank are rotated to a certain height. Due to the gravity, they fall down from the tube wall. Materials are crushed by impact action of the grinding media, friction and shearing action of grinding medias rolling and sliding.
Features: 1. Compact structure, easy operation 2. High efficiency and uniform granularity 3. Milling pot in different size can be put on the driven rubber roller within a certain range by means of adjusting space between the rubber rollers. 4. It is convenient to change pots and suitable for both wet and dry grinding.