There was an article in Braunkohle 53 (2001) No 2 April / June

where the pile was sprayed with lime slurry to create a hard crust.

The company was Lhoist in Belgium. Patent pending.

If you find any thing on the polythene layer please advise.

Gary James

Bulk Handling Innovation

Melbourne Australia ■

Dear Mr. Rekhawar,

I have read in the book only & have no experience of using the crusting agent.There are nos. of agents which are organic polymer-1 &2,Petrolium resin,Latex type etc...used depending upon the type of material.By spraying such a bonding agent over the pile, a thin solid crust is formed (about 3/8 inch.), which can last several months to a year depending on condition.

But you have not indicated the material to be covered.Also you have not indicated the purpose.I think it is for dust control only.

More I cannot able to deliver.

Regards.

A.Banerjee ■

Dear Mr.Rehawar,

I have already given some information in this regards.But it is not displaying.

I am trying to solve the problem.

REgards.

A.Banerjee ■

Dear Sir,

Test only

A.Banerjee ■

Dear Mr. Rehawar,

I read in the book only & have no experience.There are many types of crusting agents for storage piles.They are POLYMER-1&2, PETROLIUM RESIN, LATEX ETC..By spraying such a bonding agent over the pile, a thin solid crust is formed, which will normally last from months to a year depending upon condition.

But Mr. Rehawar you have to indicated the type of material being stored or is it for long term storage in open yard? I presume that you want to use spray for dust control in open storage yard.

Regards.

A.Banerjee ■

Dear Mr. Rekhawar,

I have read in the book only & have no experiance on it.There are many types of crusting agent for covering the pile.I have already written some of the types.But please indicate the material you want to store & for how many days.

Regards.

A.Banerjee ■

Dear Mr. Rekhawar,

It is a test mail. Please ignor it.

Regards.

A.Banerjee ■

Dear Mr.Rekhawar,

Just checking. ■

Dust Stop is a solution used in this type of situation and it has proven very successful. It is a 100% Environmentally Friendly powder which when mixed with water will coat the material in question and seal it with a flexible film. See Dust Stop at www.cypherltd.com for more details.

Norm Burns

Ph: +204 489-1214

E-mail: aquarian@mts.net

Web site: www.cypherltd.com ■

Originally Posted by rekhawar

Dear All,

I heard that there are spray pumps available, by which we can spray and cover the stockpile with microthin polythene film.

This way, we can protect the stockpile from rain & moisture.

Can anybody give me any information about it.

Regards

That's a good news then we are able to preserve the value of our storage and able to provide good services. ■

Hello,

The query does not mention the name of material. Material protection from rain will depend upon type of material and particular application (i.e. subsequent process or sell, etc.). Some information about this issue is as below:

1) For a material like grain any contamination will not be permitted, and so in such cases there will be only shed.

2) Often material excavated from mine will have more moisture (or some time wet). Typical case lignite. In such cases the material is stored in open. It results into drying (lessening of moisture) by wind and sunshine, without any expense, during dry season. In a country like India, the actual rain is only for 2 and a half months, and the rest of the year is without rain. So above method is beneficial.

Often such application have shed over small portion of stockpile which is used during actual heavy rain. At Neyveli lignite mine the shed is about 60 m span and about 200 m? long. At a lignite power station in Gujarat it has about 70 m span. The reclaimer (or stacker-reclaimer) travel under the shed which has no obstructing columns.

3) Then there are also dome type shed over circular stockpiles.

4) The use of spraying of solution to create water resistant coating will depend upon the application, i.e. no objection for its addition into material, etc. Secondly, its expense will depend upon how frequently the stockpile is to be stacked and reclaimed. It may have better result for granular material where coating can create effective surface. For lumpy material, the rain water may accumulate in the depression between two lumps, and coating being not so continuous, may seep into the stockpile? Refer manufacturer of such system for their views for suitability for particular application and running cost. The information from my side about this point 4 to be considered as preliminary.

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.

Pune, India.

Tel.: 0091 (0)20 25871916

Email: parimul@pn2.vsnl.net.in ■