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How to select crushing and milling equipment.


To the average eye, there appears to be little difference between the numerous rocks and minerals around Northern Ontario Northern Ontario is the part of the province of Ontario which lies north of Lake Huron (including Georgian Bay), the French River and Lake Nipissing.

Northern Ontario has a land area of 802,000 km² (310,000 mi²) and constitutes 87% of the land area of Ontario, although it
, but when it comes to choosing the right milling and crushing equipment, all rocks are not created equal.

The types of rock you are working with will have an impact on the type of equipment you need to get the job done. Before buying equipment, you need to take a long look at the type of rock and ask the following questions: How hard is the material? How abrasive abrasive, material used to grind, smooth, cut, or polish another substance. Natural abrasives include sand, pumice, corundum, and ground quartz. Carborundum (silicon carbide) and alumina (aluminum oxide) are important synthetically produced abrasives.  is the stone? How compressed is the material? What size is the material you are crushing?

Before selecting any machinery, you need to find out if you are working with a hard and abrasive substance, like copper ores Copper ores may refer to:
  • Bornite
  • Chalcocite
  • Cuprite
  • Tennantite
  • Tetrahedrite
  • Malachite
, or a softer stone, like a limestone-type material.

You need to ensure the appropriate crusher will be used to handle the type of material you are crushing. To do this, you should determine if you need a single- or double-toggle crusher.

Even though the majority of single toggle To alternate back and forth between two states.

toggle - To change a bit from whatever state it is in to the other state; to change from 1 to 0 or from 0 to 1. This comes from "toggle switches", such as standard light switches, though the word "toggle" actually refers to
 crushers are well-built, due to the motion of the machine, they should be reserved for use with softer and non-abrasive materials. Hard rocks and ores, those with 18,000 to 20,000 PSI, are more economically crushed in double-toggle crushers.

You should also give consideration to how many tonnes of rock a day you expect to crush in the machine, and whether or not there will be a second, or even a third step in the process before the rock reaches its final size. A decision will also need to be made as to whether or not you plan to filter out smaller materials before or after the crushing process.

When you purchase, you will also want to decide whether or not to buy a portable or stationary plant.

You also have the option of buying new or reconditioned re·con·di·tion  
tr.v. re·con·di·tioned, re·con·di·tion·ing, re·con·di·tions
To restore to good condition, especially by repairing, renovating, or rebuilding.
 machines. Dealing with a reputable rep·u·ta·ble  
adj.
Having a good reputation; honorable.



repu·ta·bil
 reconditioning shop will ensure you are not getting what is known in the business as a "five-gallon refurbishing."

Companies that properly refurbish re·fur·bish  
tr.v. re·fur·bished, re·fur·bish·ing, re·fur·bish·es
To make clean, bright, or fresh again; renovate.



re·fur
 crushers will offer the same warranties as they do for new machines.

Look for a company that is reputable among mining companies, has been in business for a long time, and has a good track record for supplying the spare parts Spare parts, also referred to as Service Parts is a term used to indicate extra parts available and in proximity to the mechanical item, such as a automobile, boat, engine, for which they might be used.

Spare parts are also called “spares.
 which may be needed during the life of the machine.

NEW VS RECONDITIONED

If your mine is going to be in operation for 20 or 30 years, a new crusher becomes viable. However, if you are only going to use a crusher for a few years, a reconditioned-to-new-specification crusher may be the better cost-effective option
COPYRIGHT 2005 Laurentian Business Publishing, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2005, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Article Details
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Title Annotation:THE "HOW TO GUIDE"
Publication:Northern Ontario Business
Geographic Code:1CONT
Date:Jan 1, 2005
Words:436
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