Lead is a soft, dense, low melting metal which is a very important component of batteries and around 75% of the lead productions in the world are being consumed by the industry of battery. Lead is the densest common metal and this made it really effective in sound barriers and X-ray shield. Lead has been used in the plumbing industry, the reason for this is it can resist corrosion by water.
Lead is removed from the ores that are dug out from mines under the ground. Over 60 minerals contain a type of lead, however only three are mined typically for the production of lead and galena is the most common one. Its pure form only contain sulfur and lead but is found usually with traces of other metals in it which include copper, silver, cadmium, zinc, arsenic and antimony. The two other minerals that are mined commercially for lead include anglesite and cerussite. There are more than 95% of all lead mined came from one of these minerals.
The first step in producing lead is extracting lead-bearing ore is to mine it under the ground. The workers are using heavy machinery that will drill the rock from deep tunnels or blast it with dynamite which leaves the ores in pieces. They will then shovel the ore into the trucks then haul it to a shaft.
Once the ore is removed from the mine, it will be treated at concentrating mill. This means removing the waste rock from the lead. Sulfur and galena, known as lead sulfide, are made up a significant component of the mineral. The process of rotation will collect the sulfur-bearing part of the ore that contains as well a valuable metal.
The next step is filtering to remove up 90% of the water. At this point, the concentrate consists from 40-80% led with huge amount of sulfur, zinc and other impurities. The ore will be roasted to fuse it into brittle material known as sinter which is mostly lead oxide. It will be followed by the refining process and costing. It will be cooled and cast to blocks that can weigh as much as ton.