Sticky ore unloading

Posted in: , on 26. Feb. 2008 - 02:13

Hi everyone,

I'm working for a company producing nickel in the South Pacific.

We have been experiencing a lot of problems to unload our ore during the last months as some of our mines are now producing very sticky ore.

We are currently using cranes at our berth to unload the vessels, and conveyor belts to transport the ore to our stockpiles. Because of the quality of the ore, the unloading process is now the bottleneck of our transportation chain : we have problems both at cranes and with the hoppers between the conveyors.

This problem is quite new for us and we don't know how to solve it.

I guess that we are not the only company that has to deal with sticky ore and I would really appreciate if someone could give me solutions or at least tips to handle this problem !

Maybe another thread has already been posted about the same topic ? I have been looking through the forum but I haven't found anything.

Best regards


Nickel Ore Handling

Posted on 26. Feb. 2008 - 06:14

Yes, New Caledonia laterite nickel can be difficult to handle.

There are ways to control the cohesive nature, the control of transfer station design, and the additional features that may be required to enhance the ability to handle the material.

Tell us the details. The trick is to design for surfaces the can break the cohesive bond.

Lawrence Nordell Conveyor Dynamics, Inc. website, email & phone contacts: phone: USA 360-671-2200 fax: USA 360-671-8450

Re: Sticky Ore Unloading

Posted on 26. Feb. 2008 - 07:09

Well in fact, it's more saprolites than laterites but I don't think it is very different.

There is especially one kind of ore that we receive which nature is almost like clay. When we unload it, it takes time for the ore to fall from the cranes to the extractor that leads to the conveyor belt. In fact, the ore aggregates in big clods (I'm not sure for this word !) and although we use a rotating equipment to break those clods it often blocks the system. We have the same problem whithin the hoppers between two conveyors.

What kind of details do you need ?

Thanks for your Help !

(not verified)

Sticky Ore

Posted on 19. Mar. 2008 - 03:45

If, there are issues of removing the sticky ore from the return side(s) of your conveyor belt(s), may we suggest you look at our web site This will give you insight to our unique conveyor belt cleaner (scraper) the BearWhip2000 cleaner.

There aren't too many substances stickier than hot asphalt. The BearWhip2000 handles that problem with ease. Let us solve your sticky issues. Please contact us at your leisure. Dick Grotto

Re: Sticky Ore Unloading

Posted on 20. Mar. 2008 - 07:04


I do not understand your crane usage

We had lateritic clays

Some people look at chute designs.

What we did was

Impact crusher - oil heated plates

Apron feeders under bins - install "paddle wheels" > to break the slabs as they "extrude from the bin hopper outlet.

Use Linatex rubber curtains at all impact areas - wear issue but - ide was that the rubber streches and breaks the bond....lumps fall off...need to be can get large lumps that are very solid

Look at material trajectory - impact directly onto the next conveyor belt or have a very shallow angle of impact with any wear liners/chutes .

Wear liner materials - limited success.

We did consider ceramic tiles embedded in a rubber backing - did not try. I understand that some in the WA usaed this with stretch rubber curtains for the iron ore indusrty - old wives tale??

Limit time stored in bins > consolidate and VERY hard to extract.

Try to mix your ore with rocks or cycle from ore to rocks etc.

Do U have any photos as a matter of interest.

You need to look at what is happening over the full range of moisture content etc etc.

You will never get it 100% fixed in my view.

Hope that this helps



(not verified)

Sticky Ore

Posted on 9. May. 2008 - 12:13

You may be interested in taking a look at our website - Our company specializes in release agents to the mining industry that prevent materials from sticking (and freezing) to equipment such as haul truck beds, ore cars, conveyors, chutes, etc.