argentina uranium mineral wet ball mill

energy efficient cement ball mill from flsmidth

energy efficient cement ball mill from flsmidth

You decide whether to operate the mill in open or closed circuit, with or without a pre-grinder and with side or central drive, according to your plant layout and end product specifications. Even the lining types are tailored to your operating parameters.

In addition, the large through-flow areas enable the mill to operate with large volumes of venting air and a low pressure drop across the mill. This reduces the energy consumption of the mill ventilation fan and keeps your energy costs down.

The mill is based on standard modules and can be adapted to your plant layout, end product specifications and drive type. The horizontal slide shoe bearing design enables much simpler foundations and reduced installation height, making installation quicker and less expensive.

Our shell linings are designed to suit the task at hand. In our two-compartment cement mills, the first compartment (for coarse grinding) has a step lining suitable for large grinding media. It protects the shell while ensuring optimum lifting of the mill charge. In the second compartment (and also in our one-compartment cement mills) we use a corrugated lining designed to obtain the maximum power absorption and grinding efficiency. For special applications, we can supply a classifying shell lining for fine grinding in the mill.

In fact, the entire mill is protected with bolted on lining plates designed for the specific wear faced by each part of the mill. This attention to detail ensures both minimal wear and easy maintenance. When a wear part has reached the end of its life, it is easily replaced.

The grinding media are supplied in various sizes to ensure optimum grinding efficiency. The STANEX diaphragm is designed to maximise the effective grinding area, enabling a higher throughput. It is fitted with adjustable lifters to ensure the material levels in each compartment are right. Best of all, the STANEX diaphragm works for all applications, even when material flow rates are high and the mill feed is moist.

The mills are typically driven by our FLSmidth MAAG LGDX side drive - gearing rated to the latest proven AGMA standards. The mill drive is provided with an auxiliary drive for slow turning of the mill. The LGDX includes two independent lubrication systems, one which services the girth gear guard and intakes more dust, and a second which supplies oil for the fast-rotating gearing and bearings and stays clean. If requested, however, the mills can be provided with a central drive: the FLSmidth MAAG CPU planetary gearbox. The mill design differs slightly, depending on whether the side or central drive is chosen.

Each grinding compartment has two man-hole covers to give easy access for maintenance. As there are minimal moving parts, the maintenance requirement is low and simple changes like replacing wear linings and topping up grinding media can be completed quickly and easily. Horizontal slide shoe bearings prevent oil spillages from the casing and offers easy replacement of slide shoes.

Buying a new mill is a huge investment. With over a century of ball mill experience and more than 4000 installations worldwide, rest assured we have the expertise to deliver the right solution for your project. Our ball mill is based on standard modules and the highly flexible design can be adapted to your requirements. The mill comprises the following parts.

The mill body consists of an all-welded mill shell and a T-sectional welded-up slide ring at either end, the cylindrical part of which is welded onto the ends of the shell. The mill shell has four manholes, two for each grinding compartment.

Each slide ring runs in a bearing with two self-aligning and hydrodynamically lubricated slide shoes. One of the slide shoes at the drive end holds the mill in axial direction. In the others, the slide rings can move freely in axial direction to allow for longitudinal thermal expansion and contraction of the mill body.

The slide shoes are water-cooled, and each bearing is provided with a panel-enclosed lubrication unit including oil tank, motorised low- and high-pressure oil pumps, as well as an oil conditioning circuit with motorised pump for heating/cooling and filtration of the oil.

The stationary steel plate inlet duct leads the venting air into the mill. It is equipped with a manually operated throttle valve and a pressure monitor to adjust the pressure at the inlet end, thus preventing dust emission from the inlet. The feed chute is lined with bolted-on wear plates and slopes down through the air duct to the mill inlet opening.

The more control you have over the mill, the better your grinding efficiency is likely to be. Our ball mills include monitoring systems to continuously measure the material and air temperatures as well as the pressure at the mill exit. The venting of the mill is adjusted by a damper in the inlet to the mill fan. And the material fill level is continuously monitored by means of sensors. For ball mills operating in closed circuit, the circulation load is monitored by weighing the flow of reject material from the separator. These measures ensure you achieve optimum mill performance, giving you the quality, efficiency, safetyand reliability that you need.

FLSmidth provides sustainable productivity to the global mining and cement industries. We deliver market-leading engineering, equipment and service solutions that enable our customers to improve performance, drive down costs and reduce environmental impact. Our operations span the globe and we are close to 10,200 employees, present in more than 60 countries. In 2020, FLSmidth generated revenue of DKK 16.4 billion. MissionZero is our sustainability ambition towards zero emissions in mining and cement by 2030.

suggested rubber shell liners & lifter bar thickness - grinding & classification circuits - metallurgist & mineral processing engineer

suggested rubber shell liners & lifter bar thickness - grinding & classification circuits - metallurgist & mineral processing engineer


There are numerous people who make rubber liners for ball mills, google manufactures of rubber liners for ball mills and a bunch of them will come up. You just contact them with this information and they will tell you exactly what you need at no cost, of course they will want you to buy their liners. I have had real good luck with Trelleborg out of Sweden.

Thanks Max. Yes Trelleborg has good engineers. It looks likeSAKAR, from the compression rubber molding industry, is trying actually manufacture liners himself. It would have been nice to know the actual size of your mill Sakar. The bolt hole spacing too.

The detail send by you is very helpful to me. As your require of real size of ball mill i have attache drawing of ball mill for your reference. if possible can you suggest me for side wall rubber lining ?

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rabbit lake uranium mill complex, canada

rabbit lake uranium mill complex, canada

The approximate 400 kilometers of highway were only open for a few weeks in the winter when the lakes and boggy ground were frozen. The schedule for the project had to reflect this very serious constraint on availability of access for construction materials and equipment.

In 1968, an affiliate of Gulf Oil Corporation acquired the rights to explore for minerals on 3.5 million acres in the Wollaston Lake Ford Belt located in the province's northeastern border. Using sophisticated technology, Gulf confirmed the existence of uranium deposits averaging five pounds of uranium oxide per ton of ore.

Originally, the plant was equipped with a semi-autogenous mill rated for 1,650-tons-per-day capacity. Screening followed with the oversized rock going back to the mill, and select rock being pumped into the cyclone separators. Acid leaching with counter-current decantation was followed by solvent extraction. The uranium solution is then treated with ammonia, which gives ammonium diuranate precipitate. This is dried in a multi-hearth dryer to produce U3O8, which is finally packed into steel drums for transportation.

As the ore grade declined, it became necessary to treat 2,000 tons per day rather than the designed 1,500. To achieve this increased tonnage, Fluor subsequently installed a ball mill following the cascade mill. The ball mill operates in a closed circuit with the hydrocyclones.

The diesel generator plant consisted of three 2,500-kilowatt units. Waste heat from the plant was channeled to heat the offices and workshop areas for energy conservation. At such a remote location, it was advantageous to minimize the labor force, and a high degree of automation was installed in the plant.

Procurement, expediting, and logistics played a critical role in this restricted site location. The schedule for the project had to reflect this very serious constraint on availability of access for construction materials and equipment.

Mobilization started immediately after the November 1971 contract award to meet the first ice haul period. In the summer of 1972, all construction facilities had to be readied and foundation work was started on the main building. Engineering had to progress rapidly to meet construction and structural steel drawings so that building materials could be sent up during the next season's ice haul period. Advanced planning required that different materials were delivered during each ice haul.

Fuel was always the major priority. The project entailed 235 truckloads in the first ice haul, 477 truckloads in the second ice haul, then 374 truckloads over a Canadian Government installed semi-permanent road.

In addition to supply deliveries, some winter concrete work was required. The concrete set required special attention to be heated and the work area thermally maintained at 25 degrees centigrade for over a week.

Delivering significant cost savings to the Client, Fluor housed only three of the six counter-current decantation thickeners in the building. Heat balances revealed that it was adequate to house half the thickeners outside.

At full production in 1978, the Rabbit Lake mill produced over 4 million tons of uranium oxide. The uranium oxide, or yellow cake, would be processed for sale to nuclear power plants, primarily in Europe.

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