Greetings from the "Frozen Eastern Wilderness",

The quick solution to your problem would involve using a ram to move the alumina to the front of the container rather than a screw.

It would be simple enough to set up a pipe with a double acting ram being fed from a tapered feeder hopper instead of a screw to push the material down a tube to the front with little dust. The ram could be of any length as it is only pushing the alumina.

It is an easy fix since the delivery system is fixed and stationary all that is needed is to swap out the auger pipe with a hopper and open pipe the diameter of the ram cylinder, use hydraulics rather than air as it will run with out difficulty.

The cylinders and systems made for pumping concrete will work well for this set up.

The ram can be set up with a power unit to run and ram the product as fast or slow as you wish with little difficulty 480 volt 3 phase 50 cycle power is plenty.

Please be sure to set up the ram cylinder hoses or steel pipe to have a race track pattern to allow the oil to heat quickly and effortlessly and it will run more efficiently as well with low pressure- I will elaborate further-

Both ends of the cylinder will require you to install two sets of fittings and check valves to direct the oil on both the extension side and return side to heat it up quickly and allow it to run with little effort and increased power.

With the use of check valves to direct the oil rather than allowing it to remain in the hose and ram it will heat faster and deliver more power reducing electricity cost.

By installing the four check valves at the top rear t fittings in the base of the cylinder and the t's at the front of the -making sure the oil flows in a clock wise direction around the t's insures the oil will heat up quickly and increase the power delivered to the double acting ram delivering the alumina. It works very well to keep a system heated and running well as the higher the oil temperature, the thinner the hydraulic oil, the greater the delivery power.

Another advantage of using a concrete pumping set up for this is that the pipe is or can be hydraulicly directed and moved and eventually retracted to save space is desired.

Let me know what you think as your project interests me greatly.

lzaharis@lightlink.com ■

dear Bo,

i hope i can give you some suggestions, but I am not exactly understand the situation of your problem.

what do you mean by "because the powder level has rised over the conveyer in the front of the container." ■

What you want for this application is a retractable loading screw.

It starts from the far end of the container then slowly retracts while filling. This minimises the generation of dust in the container and allows for an even fill along its length. ■

Hello Bo,

There is an inbuilt difficulty in closing the doors after loading if the screw conveyor is fixed, as your thread starter implies.Exporters of plastic pellets provide a rear closure, about 7 ply corrugated cardboard, to which the liner can be fixed after filling. Can you close the doors while the container is on the bay? Otherwise the operator is required to work at height to finalise container closure.

Have you tried dumping the air from the rig suspension AFTER loading. An empty container is reversed against the bay: alumina is dumped at the front of the trailer while the suspension airbags are pressurised for empty running: trailer then dips under the added weight while the engine is not running. After loading the engine is started and the laden running height is automatically restored. This would partly bury the screw conveyor.

You should get about 75mm drop from the suspension before pulling off the bay. You will get about 100mm drop by dumping the trailer air but too much here and the nose will lift again.

Many loading operations require air to be dumped before loading so that the trailer chassis is isolated from suspension activity. If you dump air before loading, the screw conveyor will load more material for a given discharge height & the problem will be greater.

Dump after loading: the driver will have to stop after 15m travel to close the doors & so should not forget to restore the trailer running height. There is a dashboard warning lamp to ensure the tractor ride height is restored. Lifting the tractor suspension before killing the engine will also help;but not so much.

Loading containers is akin to the old coal mining operation of bunkering-in. In the not so distant past my design portfolio developed a screw conveyor with a retractable casing. As the casing sections retreat the discharge point follows the crest of the deposited pile & dust generation is greatly reduced. Container internals are almost identical & there is no difficulty in providing a travelling bulkhead to completely contain the dust. Dust needs space & if you reduce the space there must be less dust. I can design the bulkhead for you using the same clear

material that is used for wharehouse curtains: then you will be able to see the merits of the RCSC.

If you are running vehicles with cart springs (semi ellipsiodal, multi leaf, tapered leaf whatever...but still cart springs) then your drivers will have to wind down the trailer legs to prevent the sagging refered to above. After loading they will have to retract the legs, initially in low gear mode, which they will find distatefully laborious & consequently you can anticipate clutch trouble in lieu. ■

this site have very information about containers:

http://www.grupoirs.com.br

just portuguese, but... enjoy

■

Goodmorning Bo,

Please a few questions first,

What is the bulkdensity from the Alumina powder, this to see the fillinglevel you want to reach in the container, 20 ton for a 40ft container says not eaverything ofcourse.

We have several solutions for filling containers with Bulk materials and we also have possibility's to control the dust.

The most container loading systems are designed here in Holland but maybe it's handsome for you to know we do have our main office in Kvistgaard in Denmark and we have a machine factory in Kolding. Anyway I am in Denmark very often so it must be not such a problem to pick up this project.

maybe we can solve your problem together

We hope to hear from you ■

Sorry but 20 tonnes in a 40' container does say a lot after all. Why not use 20' containers & make more use of the shipping space? You are just about covering the deck as things stand. Does the 80/20 rule apply because of the fluidity of the material? ■

We use the retractable conveyor and fine it helps reduce dust

Who supplies your liners? ■

Dear friend :

Good day!

tks for so much rich experience container special post they are idea . our company special for container spreader ,if you are interesting pls don't hesitate to contact us. we belive our product , we also happy to copperate with every frinend in bulk online forum. we also give comission .

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href="mailto:grab@shyp-pm.com">grab@shyp-pm.com

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Dear Bo,

Just read your thread concering the loading of rear opening liner 20'/40' containers. One possible solution could be our Bulk Container Loader design, offering an automated loading sequence. The twin-boom screw conveyors are loacated on a movable trolley section that can tranverse in and out of the lined container. We also have the facility to raise and lower the boom as required using hydraulic rams fitted to the trolley itself. Please feel free to review our equipment on www.turnerprocessequipment.co.uk Alternatively if you would like some additional information then please contact us via the website

Trust the above proves of interest ■

We are an experienced supplier of bulk packing( bulk/jumbo/container/big bags,FIBC), and located in Cahngzhou,China. We employ experienced workers and technologist to produce first-class quality big bags with 100% virgin material and new machines. We would like also to produce according to customers' requests

We can also supply dry bulk container liners.

For further details and interest, please don't hesitate to contact us. Sincerely hope to cooperate with you in the future.

Best regards,

David Wi

Sales Manager

Specialist in bulk packing solutions

S-MILLET PLASTIC PACKAGING

Add: Sanhekou Industrial Park,Changzhou,

213115,China

Tel: +86 519 88670999

Fax:+86 519 88670999

Mob:+86 13915848304

Email:

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If you are looking to densify your load, General Kinematics Corporation offers the VIBRA-PACK™ container densifier. Since your material has high fluidity, the gentle vibratory action of the VIBRA-PACK will allow your material to settle out throughout the container to maximize your loaded volume.

If you would like more information, feel free to contact me, or check the product out on my website, http://www.generalkinematics.com/us/...m/productid/51 ■