Dust Contamination Question

Can you not try to arrest the root (ie the fly ash/dust ?)

The attraction of these particles will be natural due to Electrostatic attraction.

Use some sort of a positive sealing and dust seggregation. This type of problem is serious.

I am more of o powergen man, where the flyash is removed by ESP, and then discharge is at 100mt or so height. But that is not feasible for you.

Second portion could have been to ensure that wind do not flow towards the switchyard (through annual wind study) this is done at some of our customer sites at the time of planning stage (eg aluminium smelter plants etc where the application is similar to you). But on a running plant this is also now out of context.

Going for a protected / enclosed switchward- not feasible if you are on HT switch yard.

Why not try to enclose the tube mill itself ? or put some sort of a baffle/ wind diverter so that the wind do not carry the particles towards the S/Yard ?

Of you see in most of the power stations the tG hall is postioned between the boiler and the switch-yard.

All these will cost on short term,

An Industrial Engineer's approach:

There are at least 3 options to the problem: 1) capture the cement kiln dust (CKD) generated by the kiln using precipitators, 2) prevent or minimize the CKD by convert the process from dry kiln to wet kiln, and/or 3) shield the switchyard equipment from the dust using enclosures.

The 1st 2 solutions are long-term and its benefits are far ranging, and therefore more capital intensive. The 3rd is an ad-hoc solution, but would address the problem of current leakage, ultimately, shortening the life of electrical equipment.

What is called for is an engineering and economic study comparing these 3 alternatives. The decision will have to be made depending on what weighs more heavily for management, i.e., will we take the cost-effective solution, or the broader and more ecology-friendly solution?

I hope this allows you to take a macro-view of the problem.