have you tried polyurethane liners???? ■

Dear Sir.

We have used our product successfully in Iron Ore operations in Australia.

Corrosion Engineering Liners have ceramic cubes or tiles embedded in rubber. Depending on the particular application, the rubber can be mixed with molybdenum to avoid plugging and/ or fire retardant additives to avoid fire hazards.

Depending on the particular case, we could recommend tiles or ceramic wear products. Since you mention having had bad experiences with rubber in the past, our Tile wear liners have the least rubber in between tiles so the chances of fire are reduced even more while maintaining very good wear capabilities (due to the ceramic) and impact properties (due to the rubber below the ceramic).

If you could be so kind to send me your e-mail, I can provide several presentations depicting our different products in Iron Ore operations (Rio Tinto and BHP-Billiton properties mainly in Western Australia).

Respectfully,

Enrique Boada

Sales Manager Colombia

Corrosion Engineering Inc.

E-Mail: eboada@corroeng.com

Tel: 57-1-8625149

Cel: 57-313-2836864

www.corroeng.com ■

Polyurethane wears good but burns really good also. ■

Dear Mr. Ganesh,

With the operating parameters you had mentioned, UHMWPE Liners will ideally suited for this application. What is the temperature you are talking about? If it is within 70- 80 deg it will be fine. It will reduce noise, protect the mother plate from wearing and also enable free flow. We have lot of experience supplying in Sponge Iron plants.

Regards,

Krishanu Das

Zonal Manager (West Asia)

Polymer Industries India Ltd.

krishanu@polymerindustries.co.in ■

Dear Sir,

we are producer of alumina ceramic for heavy wear problems. Only diamond is harder than ceramics, therefore we are able so solve your gliding wear problems. Ceramic cannot be used for impact. You could use ceramic for more than 1.000°C and there won´t be a sticking problem, because of its flatness. For further information, pls. contact www.etec-ceramics.com.

Best Regards

Sebastian Hofmann

Sales Export Manager ■

Dear Ganesh,

We are manufacturer's of High Alumina ceramics in India and supply ceramic and ceramic composites for various applications in the mining industry.

We would like to understand the application parameters better.

Critical Application parameters required are

1. What is the operating temperature?

2. What is the particle height of fall?

Depending on the application parameters we can recommend either ceramic liners or ceramic -rubber composite for the application. FRAS Rubber is a neoprene rubber specially formulated to be Fire Resistant Anti-Static.

Please contact us on the email ID given below. Our engineers would be happy to visit your site to understand the application and recommend a solution.

Thanks and regards,

M.Premkumar

Carborundum Universal Limited,

Ceramics Division,

#47 Sipcot Industrial Complex,

Hosur-635126

Tamil Nadu, India

Ph- 04344 278480

Fax- 04344 276028

Mobile - 9894067513

Email- premkumarm@cumi.murugappa.com ■

You can find the a best insolation for this application.

Hard facing plate 6+6mm, Basic in 6mm carbon steel

hard facing in 6mm Cr7C3, HRC63

please sent the E-mail to sales@chinmat.com

I will give you detail for the application. ■

Dear Sir,

We deal laminated special cast wear plates which are specifically used in in different chutes and are subjected to both abrasive & impact forces with heat resistance properties about 500 degree centigrade . The metallurgical bonding strength of the laminated chrome molybdenum cast plates along with high tensile back steel plates are over 35,000 psi. Various sizes including tablet sizes are available depending upon application in the area of chutes. The estimated life of our laminated cast wear plates are around 10 times more than ordinary wear plates. For further details, please send your contact details to enable us to discuss further and to submit suitable offer.

Sibtosh Chatte

HIDS

(Mobile) 91-9330868228 ■

You can try either a martensitic high carbon high chrome alloy , a welded type will be tricon or tritem.

or an austenitic high carbon high chrome , hardflex for example.

If you have a local foundry we can help you cast your oun pieces .

If this can help as a reference , the HYTemp system had 304 SS styainless pipe that lasted only one month , using the cheapest martensitic tricon it lasted 10 years .

extrapolated data from experiments run in germany with an improved alloy we acan expect 16 years , at a fraction of the cost of hardflex.

regards

marco ■

by the way the original austenitic alloy was developed By çDR. Abraham velazco at HYL , HYl abandoned the efford and severall PHD documents ghave been published since . This alloy was presenbted to tritem for custom manufacture , butv the price incresed letsey in a cosmic scale , we then opted for the martensitic tricon and abandoned the new alloy. years after tritem started producing their own austenitic alloys , whether they are the HYL type or not I do not know.

We redeveloped the alloy reducing or eliminating the micro and macro cracks to produce pipes , these are now manufactured in Australia successfully.

Marco ■

Stone box arrangement is ideal for handling pellets through chutes. The angles / or steel flats used for stone-box arrangement can be placed on chutes with cleats passing through the chute wall held in position by wedges. This makes replacement easy.

Stone boxes will not work for moist iron ore concentrate. Ultra high density polymer lines work well. ■

indeed if it were anything else but sponge iron in an oxigen bearing athmosphere .

Rock boxes although widely used , when used in sponge iron , you should consider the possibility of ignition and further contamination of the load, a rock box will make a tranfer fire unextinguishable . yes it can be used , but you should consider if you can live with the hot spot,

for example if the bin is a transit bin to a meltshop , you might as well descide to live with it as the sponge will not sit enough time to form clusters , although you will be4 loosing metalisatio. a standardf loss of metalisation in 4 hrs in a contaminated meltshop bin can be 6% vs 2%

if this is a ship loading station you might descide not to run the gambit.

marco ■

One of the major reasons for particle break down could be the low resilence of the Liners used. Rubber liners are the best in terms of resilence and sufficient thickness has to be given to the liners to over come the impinging force of the particles hitting the liners. Size and shape of the particle, velocity and angle of impingment has to be taken into consideration while deciding the thickness of liners. To have fire resistance, Liners based on Poly chloroprene(Neoprene) suitably compounded for Fire retardancy has to be used. The reselience of the rubber should be kept above 50%.

Rajagopal ■

Sorry but plastics or rubbers are not the solution here , no magical alternative .

High temnperature fourocarbonated compounds like Viton and even stabilized silicon have a temperature limit of about 300ºc sponge iron can go to much higher temperatures , and fast , 800ª to 1000 in a transfer point , but they are free to try , this will be a very unexpnsive test . Jus be aware that viton is not flame retardent , it burns , smells funny , like cinnamon, but it burns.

About degradation of sponge iron you can see my article in the IFPS pneumatic copnveying of hot sponge iron, we run extensive testing (thousand of tests , one full year) to find out the particle attrition parameters in free fall and in pneumatic conveying. The data is all there, using Pea Colorada , and Alzada Dolomitic Pellets. There is a minimun speed for breakage , where particle attrition rises exponentially, this was reported I believe extensively by Jerry Johansen and many others, none of them mentions that I remember the surface elastic modulus.

We found no difference with the impact surface linned or un linned , in escence it might be because most of the particles actually hit other particles.

But this is academic .

If your rubber can survive its use in sponge iron transfer points you are in for a lot of money .

Good luck.

marco

Attachments

ifps hot sponge iron pneumatic conveying (PDF)

■

about Neoprene .

It is flame retardant but it decomposes at lower temperatures .

Attachments

rubbers (JPG)

■

Neoprene is a synthetic rubber that resists degradation from sun, ozone, and weather. It performs well in contact with oils and many chemicals. Neoprene remains useful over a wide temperature range, displays outstanding physical toughness, and resists burning inherently better than exclusively hydrocarbon rubbers. Neoprene also offers resistance to damage caused by flexing and twisting. Suggested operating temperature (-45° to 230° F). Trade names include Neoprene (DuPont Dow), Baypren® (Mobay), and Butachlor® (Ditsugil). ■

For iron ore ,,

High density poliurethane works fine ... ■

For all your Impact Absorbing, Wear & Heat Resistant Liners needs. please see www.melcocastings.com

contact person: Ankit chandra

Phone: +91 98184 36295 ■

For a more universal response I would check the ASTM standards on high temperature wear , and the rference documents .

Marco ■

Originally Posted by etecceramics

Dear Sir,

we are producer of alumina ceramic for heavy wear problems. Only diamond is harder than ceramics, therefore we are able so solve your gliding wear problems. Ceramic cannot be used for impact. You could use ceramic for more than 1.000°C and there won´t be a sticking problem, because of its flatness. For further information, pls. contact www.etec-ceramics.com.

Best Regards

Sebastian Hofmann

Sales Export Manager

yes, ceramic can be used in the high temperature, but how can you assure the ceramic will not fall off due to the glue can not stand high temp ■

Dear S Ganesh,

We have noted your e-mail content problem.

We are of opine that you should switch on to Poylurethane Liners and we at

Utility Engineers have a good solution for your wear & tear problem.

Pls. contact us on utilityengineers@mtnl.net.in or call us on 9869031395

or +91-22-22-22676936.

Looking forward to hear from you,

With regards,

AMIT SHETH

EXECUTIVE APRTNER

UTILITY ENGINEERS

210 -VEENA CHAMBERS,

21 DALAL STREET,

OPP. BOMBAY STOCK EXCHANGE TOWERS,

FORT, MUMBAI - 400 001,

INDIA

TEL:+91-22-22676936(DIR.) / 34

T/F:+91-22-22676934

CELL:+91-9869031395

E-MAIL:utilityengineers@mtnl.net.in

Originally Posted by sganesh

Impact Absorbing, Wear & Heat Resistant Liners

We are handling iron ore & iron ore pellets for sponge iron plant. When the above material passes through chutes, fines ( particles less than six millimetres ) increase due to impact on the chute and within the material.

I am looking for liners which will be having all three qualities of

- Impact absorbing

- Wear resistant

- Heat resistant to avoid the fines generation.

Rubber or PTFE liners are not prefered as there may be a chance of fire accidents if any hot works carried nearby. ( Experienced in the past ! )

Is there any solution?

■

Dera friends .

handling sponge iron is not like handling Iron Ore . the sponge iron is escentially molecular Iron. and given the right conditions it can catch fire (runaway reoxidation).... Rubber liners are not suitable for the application.

Poliurethane linners are fine in other applications , not here .

Regards

Marco Flores

Attachments

storage fire (JPG)

■

Dear S Ganesh,

We have noted your e-mail content problem.

We are of opine that you should switch on to Poylurethane Liners and we at

Utility Engineers have a good solution for your wear & tear problem.

Pls. contact us on utilityengineers@mtnl.net.in or call us on 9869031395

or +91-22-22-22676936.

Looking forward to hear from you,

With regards,

AMIT SHETH

EXECUTIVE APRTNER

UTILITY ENGINEERS

210 -VEENA CHAMBERS,

21 DALAL STREET,

OPP. BOMBAY STOCK EXCHANGE TOWERS,

FORT, MUMBAI - 400 001,

INDIA

TEL: +91-22-22676936 +91-22-22676936(DIR.) / 34

T/F:+91-22-22676934

CELL: +91-9869031395 +91-9869031395

E-MAIL:utilityengineers@mtnl.net.in ■

I believe they do not understand what they are getting into..

But the customer might have the silos in an inert gas athmosphere and could be desperate enough to try poliurethane , even when not on fire internal temperatures of DRI silos can reach 100ºc , 50 below what is considered the start of a runaway reoxidation , a difficult term to coin as it depends in heat generation vs heat dissipation, 1t 100ºC poliuretane starts to soften, and sometimes runs. (flow) but I might be wrong.

In the other hand whan handling Iron Ore , it works fine, when properly installed.

Marco ■

Impact Absorbing, Wear & Heat Resistant Liners

We are handling iron ore & iron ore pellets for sponge iron plant. When the above material passes through chutes, fines ( particles less than six millimetres ) increase due to impact on the chute and within the material.

I am looking for liners which will be having all three qualities of

- Impact absorbing

- Wear resistant

- Heat resistant to avoid the fines generation.

Rubber or PTFE liners are not prefered as there may be a chance of fire accidents if any hot works carried nearby. ( Experienced in the past ! )

Is there any solution?

Original thread does not say anything about handling sponge iron. Querry is for handling iron ore and iron ore pellets. main aim is to avoid fines generation.

Polyeurathene or UHDPE is not acceptable as sometimes hot pellets may be handled. In such a case stone boxes may be an optimum solution. ■

Originally Posted by Vinayak

Impact Absorbing, Wear & Heat Resistant Liners

We are handling iron ore & iron ore pellets for sponge iron plant. When the above material passes through chutes, fines ( particles less than six millimetres ) increase due to impact on the chute and within the material.

I am looking for liners which will be having all three qualities of

- Impact absorbing

- Wear resistant

- Heat resistant to avoid the fines generation.

Rubber or PTFE liners are not prefered as there may be a chance of fire accidents if any hot works carried nearby. ( Experienced in the past ! )

Is there any solution?

Original thread does not say anything about handling sponge iron. Querry is for handling iron ore and iron ore pellets. main aim is to avoid fines generation.

Polyeurathene or UHDPE is not acceptable as sometimes hot pellets may be handled. In such a case stone boxes may be an optimum solution.

You do get Fire Resistant Grade P-U Liners. Please arrange to send details of your requirements for further n.a.

Regards,

Dinesh ■

Originally Posted by sganesh

I am looking for liners which will be having all three qualities of

- Heat resistant to avoid the fines generation.

Do heat resistant liners avoid fines generation ■

How do liners contribute to generation of fines, their function is abrassion resistant, to protect mother plates of your bins/chutes,reduce friction etc. Please be specific what you are looking for from liners. We have closely worked for Mandovi Pellets in Goa.

Regards,

Dinesh ■

The specific phrase I referred to was heat resistant liners ■

I concur, , a moving rock ladder under the discharge and over the exit of the bins can be of great help. reducing degradation and to an extent wear.

These are simple enough to build ant to install. just remember to make it extremely strong as to support the solid drag forces , .

rememder to carefully align the bottom exit to the ladder . Drop me a line in my e mail and i will gladly supply you with sketches.

Note .

The standard Midrex rock box will help but it can and will clogg. defeating the purpose .

Marco A. Flores V. ■

Originally Posted by sganesh

Impact Absorbing, Wear & Heat Resistant Liners

We are handling iron ore & iron ore pellets for sponge iron plant. When the above material passes through chutes, fines ( particles less than six millimetres ) increase due to impact on the chute and within the material.

I am looking for liners which will be having all three qualities of

- Impact absorbing

- Wear resistant

- Heat resistant to avoid the fines generation.

Rubber or PTFE liners are not prefered as there may be a chance of fire accidents if any hot works carried nearby. ( Experienced in the past ! )

Is there any solution?

Dear Friend,

Have u ever used the alumina ceramic liner . it can meet all ur requirement. and it has very competitive. coz we are the source.

more detail in www.kingcere.com , u can also send the masseges to the micheal@kingcera.com

Have a nice day! ■

Detailed drawings should be sent to engineer something here. the rules are simple ,

reduce the impact speed

reduce the hammer effect

use wear resistant linners , alumina is one choice the others are high chrome overwelds

use a moving rockbox.

the last requires carefull design , but that might be the best at the end if particle degradation is a concern..

Regards

Marco

.

Originally Posted by michealiujunhu

Dear Friend,

Have u ever used the alumina ceramic liner . it can meet all ur requirement. and it has very competitive. coz we are the source.

more detail in www.kingcere.com , u can also send the masseges to the micheal@kingcera.com

Have a nice day!

■

Alumina ceramics / Zirconia ceramics / ZTA

Supplier of advanced ceramics since 2004

https://aluminaceramics.wordpress.com ■