The concentration of copper in ores averages only 0.6%, and most commercial ores are sulfides, especially chalcopyrite (CuFeS2), bornite (Cu5FeS4) and, to a lesser extent, covellite (CuS) and chalcocite (Cu2S). Conversely, the average concentration of copper in polymetallic nodules is estimated at 1.3%. The methods of extracting copper as well as other metals found in these nodules include sulfuric leaching, smelting and an application of the Cuprion process. For minerals found in land ores, they are concentrated from crushed ores to the level of 10–15% copper by froth flotation or bioleaching. Heating this material with silica in flash smelting removes much of the iron as slag. The process exploits the greater ease of converting iron sulfides into oxides, which in turn react with the silica to form the silicate slag that floats on top of the heated mass.
Packing and shipping:
- Products covered with boards are used for transportation protection.
- All products will be packed in solid wooden packaging.
- Each carton with good support and reinforcement.
- Take photos of container loading and seal the container.
- Fast transportation speed. Let the customer know every step.
FAQ:
Q1. What are your company's main products ?
A1: Our main products are stainless steel, carbon steel , galvanized and Aluminum products and etc.
Q2: Are you a manufacturer?
A:Yes, we are manufacturers. We have our own factory and our own company. I believe we will be the most suitable supplier for you.
Q3: Can we visit your factory?
A: Sure, we welcome you to visit our factory , check our production lines and know more about our strength and quality.
Q4: Do you have quality control system?
A: Yes, we have ISO, BV, SGS certifications and our own quality control laboratory.
Q5: How do you ship the goods and how long does it take to arrive?
A: For samples, We usually deliver by DHL, UPS, FedEx or TNT. It usually takes 3-5 days to arrive.Airline and sea shipping also optional. For mass products, ship freight is prefered.
Q6: How long is your delivery time?
A: Generally it is 7days if we have the exact goods in our stock. If not, it will take around 15-20 days to get goods ready for delivery.
Q7: Can I get some samples?
A: We are glad to provide samples to you.
Q8: What is your after-sale service?
A: We provide after-sale service and offer 100% guarantee on our products.
