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Mobile Jaw Crushers and Reinforced Concrete.
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stevie40  
#1 Posted : 17 February 2012 15:00:35(UTC)
Rank: Super forum user
stevie40
Dealing with a client who operates a quarry but emphasis is now on processing of inert waste rather than extraction.

Lorry loads of reinforced concrete are brought to site from demolition works and then fed, via a 360 grab into a mobile jaw crusher which reduces it to rubble.

The client has a member of staff stood on the mobile jaw crusher unit sifting the load for rebar which is then pulled before crushing.

I've tried explaining that this is a highly dangerous process for the following reasons:-
Noise
Whole body vibration
Struck by falling or ejected materials
Moving machinery / crush risk
Inhalation of RC Silica.

Client maintains it is standard practice within waste industry on this type of work.

In a quarry, the jaw crusher would be remote operated by the 360 driver with no person on the crusher. Can somebody, perhaps with a WAMITAB background, tell me I am wrong to tell this client to change? The only solutions I can see are costly magnetic separator systems and I'm not even sure if these could be easily retrofitted.
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stevie40  
#2 Posted : 17 February 2012 15:51:50(UTC)
Rank: Super forum user
stevie40
Slight update.

Spoken to an HSE Quarry inspector (very helpful btw).
Practice is absolutely forbidden due to dangers from ejected particles. Magnets and pecker arms should be used to pick out metal fragments. Apparently colleauges in construction / demolition are seeing a number of incidents involving mobile jaw crushers and are clamping down hard.

Also mentioned that once a quarry starts handling waste in this way, the quarry regs are disapplied to that section of the quarry.

Went back to the client - fine with the need for magnets but still requires an operative to sift out wood and plastic from the feed hopper. Also explained that this practice was commonplace on all demolition sites.

Anyone got any solutions?
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leadbelly  
#3 Posted : 17 February 2012 16:12:13(UTC)
Rank: Super forum user
leadbelly
Stevie

Are the lumps of waste small enough to be put onto a sorting conveyor before they pass to the crusher?

LB
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Palmer20061  
#4 Posted : 17 February 2012 16:13:22(UTC)
Rank: Forum user
Palmer20061
Hi Stevie - we run a few quarries with inert landfills & would never allow a person on the crusher.

Obvioulsy I can't fully see the setup, but as you've got a 360 can't you tip short & sort at ground level?

If you're getting a lot of timber & plastic I'd suggest you get the client to take back a few loads as these aren't inert. Once they've taken one or two back they soon get the message!
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bob youel  
#5 Posted : 17 February 2012 16:18:55(UTC)
Rank: Super forum user
bob youel
Tipical; making a fortune but still treats people with no respect etc! And just to clear up things for those who do not know WAMITAB has noting to do with H&Safety

Again the activity described here [if it is of an avereage situation in that kind of industry] is higher risk so something needs to be done as one slip may lead to a serious accident and the term 'standard practice' has no meaning unless that practice is best practice

Again I resort to the comment; carry out an evaluation of the job to discover better and safer ways of doing things - by evaluating properly you may also save the employer money
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Joebaxil  
#6 Posted : 17 February 2012 17:45:37(UTC)
Rank: Forum user
Joebaxil
bob youel wrote:
Tipical; making a fortune but still treats people with no respect etc! And just to clear up things for those who do not know WAMITAB has noting to do with H&Safety

Again the activity described here [if it is of an avereage situation in that kind of industry] is higher risk so something needs to be done as one slip may lead to a serious accident and the term 'standard practice' has no meaning unless that practice is best practice

Again I resort to the comment; carry out an evaluation of the job to discover better and safer ways of doing things - by evaluating properly you may also save the employer money


I understand this as , I may be wrong but a clear lack of investment with lack of keeping up to date with current technical and available inventions , clearly practicable duty if ever there was ?


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stevie40  
#7 Posted : 02 March 2012 12:53:33(UTC)
Rank: Super forum user
stevie40
Many thanks for all the replies to this. Given me something to put to the client.

Joebaxil - nail / head / hit.
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