Please tell me about capacity of crushing and grinding of gold bearing ores?
2019-08-29 Our local partner in Tanzania is asking about various parameters required to determine the rock crushing and grinding capacities, usually necessary to be provided to Chinese manufacturers of rock crushing and grinding machinery. We always recommend American based and European machinery before Chinese machinery, first for the moderate price, as when one knows where to purchase machinery, the quality and capacity of such machines are usually superior to Chinese made machines. Second because it is cheaper. Many purchase machinery in China, due to online marketing of chinese manufacturers. Pricing is yet still cheaper in USA, Canada and Europe.
Hello, how are you? I hope your family is fine too. See my answers below.
- Customer is asking questions [2019-08-29 19:00]:
Good day to you Mr Jean Hope your well. Can you please help Me on this.Please Write for me some info about our site. As followed below Thanks in advance
- Raw material
- Feeding Size
- Input Size
- Output size
Such question is usually given by Chinese salesmen to understand what material you need to crush.
raw material, they are asking here what kind of stone it is. You should always say it is “quartz”, even if not quartz. Please note that quartz is one of strongest minerals, and that such is often crushed and grinded in Tanzania, as such mineral often has gold, but not always. Always say “quartz”.
feeding size is size of rocks that are entering the machine. Normally the rocks can be as large as 30 cm, such larger rocks are usually crushed, if there is no better machine, people crush that with hammer and hands. But if there is jaw crusher, you use the jaw crusher to crush larger rocks. That is called primary crushing.
I cannot know what is your feeding size. If this relates to your land near Mgusu, I will tell you below different information.
Capacity is what you actually CAN process in one day. If you do not have fast excavation, you cannot use higher capacity for crushing or grinding. For example, if you can excavate only 2 tonnes of rocks per day there is no use to purchase machine that is handling 5 tonnes per hour. It does not match. 2 tonnes per day does not match 5 tonnes per hour. Basically, if there is no blasting, no compressor, not fast excavation, you need smallest capacity. You would need to know how much people can excavate before deciding which machine to buy
input size, makes no sense to me, as input size is just same as feeding size. So input size is size of rocks that are entering the machine.
For crushing, you can have larger rocks, like 30 cm, 20 cm in size.
I am attaching one PDF file here, that you can understand it. Look at crushing, that is jaw crusher, it is for larger rocks, then come some other type of secondary grinding, or third grinding, then it goes to recovery.
output size iz size of rocks that you wish to get after crushing or grinding. I do not know if that relates to larger rocks or small rocks.
People are using blasting, compressors, pneumatic hammers and cranes to lift rock ores from shaft. Size of rock is maybe 20 cm.
Rocks are crushed with jaw crusher, see picture, the output size becomes maybe 1-2 cm.
The ball mills accepts 1-2 cm and gives output of less than 0.2 millimetre.
Material is then processed with water to recover gold.
PLEASE NOTE FOR YOUR LAND:
Last time I was on your land, it was business of alluvial mining, and not rock mining. Your brother did not find good ores, thus purchasing any machine without knowing that you do have ores, would be expensive investment. You need smallest machine first only to make sure that you have the ores.
The type of mining on that location is processing with water, that means excavation, and processing on sluices, no grinding, no crushing required. Purchasing rock crushing or grinding machines would not be appropriate. Maybe you found ores. If you found ores, maybe it is appropriate.
That is what I know about your land.
WE ARE MANUFACTURING OUR MACHINES:
We are manufacturing our machines, small scale machines, 500 kg per hour.
If you are buying ball mill in Tanzania, kalasha, that is 100 kg per hour, and it cost US $4000 or about 9-10 millions.
Our machine is 500 kg per hour, which is 5 times more than local kalasha, and it is US $2000 in price. We have 10 machines ready in Europe, and some of them we imported to Uganda and some ball mills to Tanzania.
Using machines requires face to face training.
Contact us to Start Your Own Gold Mine. There is a simple rule at Start Your Own Gold Mine: if we can help you, we do, whenever and wherever necessary, and it's the way we've been doing business since 2002, and the only way we know