There is very little you can do to reduce , let alone eliminate, that kind of dust on that kind of plant. Tertiary crushers for that product are generally high speed rotating machines which generate airborn fines as a matter of principle. The dust comes from the machine directly & from adjacent stockpiles disturbed by the machine air currents.

Covering the screens with tarpaulin does not help because the dust escapes through the screen deck apertures. As it would.

Your scenario is quite typical of quarry operations. Buy the cheapest gear around & then whinge when it doesn't perform.

Think about it, your plant intended to make powder from rock & then feigns dust generation as an unforseen event.

Why feed rock into bins, where there will be less dust, & then dump powder on the deck?

Quite simply, if you are serious about your workers continued respiration, scrap that rubbish & invest in covered belts, enclosed screens & feeders along with sealed hoods for the crushers.

I've seen marginally worse. ■

Dear Mr. Jesus,

You have not mentioned name of material creating the dust. There are three standard methods to reduce the dust emission from equipment to external environment :

1) First, try to minimise the dust emission from equipment to environment by reducing the clearance at material entry point and material exit point, from specific equipment wherever feasible.

2) Use dust extraction or dust collection system. This system creates slight negative pressure in dust generating zone and sucks the dust-laden air. The dust so collected can be re-utilised. The negative pressure results into outlet air going into the dusty zone rather than dusty air coming out of the dusty zone.

3) Dust suppression system. In this case very fine spray of water or water mixed with chemical is sprayed on the dust-creating zone. This is also utilised to spray water on stockpiles to reduce dust creating by winds.

You can refer to the manufacturers of the above systems, who can suggest the appropriate measures. All the above equipment are extensively used, across the world.

Regards,

Ishwar G Mulani.

Author of Book : Engineering Science and Application Design for Belt Conveyors.

Author of Book : Belt Feeder Design and Hopper Bin Silo

Advisor / Consultant for Bulk Material Handling System & Issues.

Email : parimul@pn2.vsnl.net.in

Tel.: 0091 (0)20 25882916 ■

dear mexicano.

have you tried water.

long time ago we had a very similar problem in our ore and coal stacks .

the ore stacks were spayed with sprinclers, the same used in gardens the finer the drop the better.

some people came to sell us ultrasonic devices , we install them , they self destroyed.

try the mist generators used as coolers in some gardens , they might work better and you might use less water .

also tri hich pressure karcher pumps to create this mist , if they work , then go industial.

Marco

In monterrey ■

Jess,

Ah te va en espaol.

Yo trabaj para el Grupo ALFA por muchos aos.

El polve siempre fue un problema en Monterrey. Fundidora mojaba sus pilas con "sprinklers". Nosotros colocamos sistemas ultrasnicos, pero duraban muy poco.

Por qu no pruebas usando nieblas. Si el problema es en el piso, pudieras usar tambin Cloruro de Potasio, pero lo mejor es usar nieblas, si tienen agua disponible.

Saludos,

Marco Flores ■

te lo localizo , se usa en los parques para los caminos , en estados unidos lo usan como sal para descongelar las carreteras.

trabaja como material higroscopico que humedece el piso.

no tienes nada de agua?

si subes la humedad ambiental el polvo se precipita mas rapido.

la otra idea es puedes contenerlo y canalizarlo , poniendo lonas y un ventilador a un colector de polvo seco que tu construyas o que compres , aqui hay que atacar cada equipo y confinar uno por uno . lo malo es que en mexico las cubiertas se remueven para mantenimiento y nunca se reponen , no uses ductoshorizontales largos , de preferencia pon el colector arriba de la tolva o de la pila

los ductos se tapan al cambiar la carga y acabas tirandolos.

selecciona un equipo para hacer tu primera prueba y convence a la administracion que es una prueba ya bien sea con nieblas o con un colector. Cuando este lloviendo o el ambiente muy humedo no uses el colector seco

Empieza can las nieblas si hay agua.

si no empieza confinando. equipo por equipo. haz un plan sistematico y planea lo que vas a hacer , a los dueos les gusta ver orden.

y es mas facil que vean el retorno de inversion.

te busco lo del cloruro de potasio , si no recuierdo mal industrias del alcali lo vende.

suerte

marco flores ■

let me go back to english

cascade chutes.

there are severall very smat designs .

In mexico they end up demolished by the payloaders.

But they work.

If you can visit HYLSA puebla you might see some in action .

Ask what are they doing.

i found that is better to beep a pile to slide material in material .

But I cannot see if your trippers (belts) can move?

can you lower you belts to start a pile reducing the drop?

a frame and a cuple of cables can do the trick. no need to hurry.

Or a concrete slide .

regards

marco ■

Dear Mr. Mexicano,

If the dust pollution to the environment is by wind, then this can be minimized by following means :

1) Enclosed stockpile i.e. shade over the stockpile. This would require the investment to create a shade.

2) The installation of dust suppression system. In this case, water-spraying nozzles are spaced at some 25 to 30 m interval depending upon the stockpile width etc. These dust suppression nozzles are connected to the water pipe running around the edge / edges of the stockpile. The continuously running pump keeps the water pressurised in the pipe. Each nozzle is equipped with a solenoid valve and timer etc. to start the spraying of water for certain duration. Then automatically next nozzle starts spraying. This spraying of water continues to occur in cyclic pattern automatically all the time, once the system is switched on. Operator decides the use of this system depending upon the wind conditions and the needs. The water spraying is in a controlled manner wherein it keeps the stockpile surface moist. It does not add water into complete stockpile.

Such system is extensively used in all important power stations in India for minimizing the coal dust pollution by wind to the environment. The system is very useful in dry weather localities. Spraying of water is in fine jet form, by automatically swiveling nozzle.

To me it seems moistening limestone surface, would not be objectionable from material characteristic point of view, because it is a naturally occurring material and does not alter characteristics in objectionable manner (because limestone would be already moist / wet in the monsoon season).

Refer the manufacturers of such systems for more details.

Regards,

Ishwar G Mulani.

Author of Book : Engineering Science and Application Design for Belt Conveyors.

Author of Book : Belt Feeder Design and Hopper Bin Silo

Advisor / Consultant for Bulk Material Handling System & Issues.

Email : parimul@pn2.vsnl.net.in

Tel.: 0091 (0)20 25882916 ■

Dear Sir,

We have pleasure to inform you that we are manufacturing speciality chemicals for various industrial applications. We have Dust Suppression products range 'DUSTRON' for the DUST SUPPRESSION in mining operation for haulage road in open cast mines and for the bulk material handling systems.

We have a Memorandum of understanding (MOU) with Central Mining Research Institute (CMRI) Dhanbad, India which is a part of Council of Scientific & Industrial Research Govt. of India. CMRI is the world recognised Institute for the research in the field of mining operation.

The following products are approved and accepted by the Indian Mining Industries since last 10 years for better environmental and mining conditions.

1. DUSTRON PC Compound: For the open cast mines haul road where the dust emission is because of HEAVY EARTH MOVERS of high capacity trucks Dozzer, Tippler etc. DUSTRON PC is used for various class of mines in India for dust suppression in the mines as under.

(1) Iron Ore Mines

(2) Zinc Mines

(3) Lime Stone Mines

(4) Copper/Chromite Mines

2.DUSTRON PC COAL : For the open cast mines haul road of collieries, railway sidings and coal jetty's road of the ports.

3.DUSTRON PC LIGNITE : For the haulage roads of lignite open cast mines.

4.DUSTRON XT : This product is used for the dust suppression of bulk material handling system where at the transfer point crusher house, dumper platform dust emission is heavy, so along with water spray DUSTRON XT is used to control dust emission.

5.DUSTRON XT COAL : For bulk material handling system of conveyors, dumper platform, wagon tipplers of open cast/ under ground mines, Thermal power plants and coal jetty on the port trust.

All the above products are used in Indian mining industries to control dust for better environment & working conditions which produce no. of advantages.

We hope that you might be consuming some product for similar application. "Using DUSTRON RANGE OF PRODUCT SAVINGS IN WATER is 40%" with other benefits.

If you find any interest we shall send you the detail literature for your reference along with quotation.

We request you to send us your e-mail address to contact you on net.

E-mail: nrd@juno.com

We ensure you to provide you best services and technical back-up to your mines for dust suppression applications.

Awaiting for your valued inquiry.

Thanking you,

Yours faithfully

For N R D Industries

DIPALI SHAH. ■

Dear Sir.

DUSTRON:

We also have the pleasure to inform you that we are manufacturing specialty chemicals for various industrial applications. We have Dust Suppression products range 'DUSTRON' for the dust suppression in mining operation for haulage road in open cast mines and for the bulk material handling systems.

We have a Memorandum of Understanding (MOU) with Central Mining Research Institute (CMRI) Dhanbad, India which is a part of Council of Scientific & Industrial Research Govt. of India. CMRI is the world recognized institute for the research in the field of mining operation.

The following products are approved and accepted by the Indian Mining Industries since last 10 years for better environmental and mining conditions.

1. DUSTRON PC Compound: For the open cast mines haul road where the dust emission is because of heavy earth movers of high capacity trucks Dozzer, Tippler etc. DUSTRON PC is used for various classes of mines in India for dust suppression in the mines as below.

(1) Iron Ore Mines

(2) Zinc Mines

(3) Lime Stone Mines

(4) Copper/Chromite Mines

2. DUSTRON PC COAL: For the open cast mines haul road of collieries, railway sidings and coal jetty's road of the ports.

3. DUSTRON PC LIGNITE: For the haulage roads of lignite open cast mines.

4. DUSTRON XT: This product is used for the dust suppression of bulk material handling system where at the transfer point crusher house, dumper platform dust emission is heavy, so along with

water spray DUSTRON XT is used to control dust emission.

5. DUSTRON XT COAL: For bulk material handling system of conveyors, dumper platform, wagon tipplers of open cast/ under ground mines, Thermal power plants and coal jetty on the port trust.

All the above products are used in Indian mining industries to control dust for better environment & working conditions which produce a number of advantages.

We hope that you might be consuming a product for similar application. It will be helpful to know that "Using DUSTRON range of products equals to a savings of water by 40%" with other benefits.

We ensure you to provide the best services and technical back-up to your mines for dust suppression applications. Please contact us at nrdindustries@gmail.com for more information regarding the information mentioned above or enclosed within. Thanking you in advance for your time and hoping to hear from you soon.

Please send me e-mail adderess.

Sincerely,

Mrs. Shah

N R D Industries ■

Originally Posted by mexicano

Tanks for your comentaries

The grand problem is the stockpiles, the dust is increased by winds.

The material is limestone.....

Please help me

Mexicano

Dear Sir,

Please allow us to introduce ourselves, we are NRD Industries. We are

currently offering product such as DUSTRON range of products for the

dust suppression industry. Below is a brief description of product,

and also enclosed is more literature for the same.

DUSTRON:

We also have the pleasure to inform you that we are manufacturing

specialty chemicals for various industrial applications. We have Dust

Suppression products range 'DUSTRON' for the dust suppression in

mining operation for haulage road in open cast mines and for the bulk

material handling systems.

We have a Memorandum of Understanding (MOU) with Central Mining

Research Institute (CMRI) Dhanbad, India which is a part of Council of

Scientific & Industrial Research Govt. of India. CMRI is the world

recognized institute for the research in the field of mining

operation.

The following products are approved and accepted by the Indian Mining

Industries since last 10 years for better environmental and mining

conditions.

1. DUSTRON PC Compound: For the open cast mines haul road where the

dust emission is because of heavy earth movers of high capacity trucks

Dozzer, Tippler etc. DUSTRON PC is used for various classes of mines

in India for dust suppression in the mines as below.

(1) Iron Ore Mines

(2) Zinc Mines

(3) Lime Stone Mines

(4) Copper/Chromite Mines

2. DUSTRON PC COAL: For the open cast mines haul road of collieries,

railway sidings and coal jetty's road of the ports.

3. DUSTRON PC LIGNITE: For the haulage roads of lignite open cast mines.

4. DUSTRON XT: This product is used for the dust suppression of bulk

material handling system where at the transfer point crusher house,

dumper platform dust emission is heavy, so along with water spray

DUSTRON XT is used to control dust emission.

5. DUSTRON XT COAL: For bulk material handling system of conveyors,

dumper platform, wagon tipplers of open cast/ under ground mines,

Thermal power plants and coal jetty on the port trust.

All the above products are used in Indian mining industries to control

dust for better environment & working conditions which produce a

number of advantages.

We hope that you might be consuming a product for similar application.

It will be helpful to know that "Using DUSTRON range of products

equals to a savings of water by 40%" with other benefits.

We ensure you to provide the best services and technical back-up to

your mines for dust suppression applications. Please contact us at

nrdindustries@gmail.com for more information regarding the information

mentioned above or enclosed within. Thanking you in advance for your

time and hoping to hear from you soon.

Sincerely,

Mrs. Dipali Shah-Pandya

N R D Industries

86 Commonweallth Ave

Piscataway, NJ 08854.

USA ■

Dear Jesus,

after this time after you posted your thread, I would like to know:

Q: is it your problem solved?

if yes, could you talk please about the found solutions???

if not, could you please send another photos, showing more details of the equipment, and the main transfer points??

Greetings from Brazil.

Alexandre Calijorne ■

Dear Jesus,

As far as Heap is concern. I had come accross the Austria Company they actually demonstrated at our Coal Handling plant(India), some chemical is mixed with water in some ration for different material (actually they study at site) and sprayed on to the heap and the surface of the material becomes cake resulting no dust fly because of wind.

Secondly u dont require any fixed sprinklers, pump house for spraying that chemical+water. Actually they developer portable Kit can be mounted on vehicle of ur make so that spraying can be done by manually with one nozzle provided.

In India Tejo Engineering people have collobration with Austria Company.

Pl go to google and search for more information and revert back for any information.

Ramesh Kumar ■