Most of the silicon needed to produce solar cells is mined from regions with significant reserves of high-purity quartz.
The mining of quartz typically involves several methods depending on the nature and location of the deposit. Here are the common methods used:
- Open Pit Mining: This is the most common method for mining quartz. It involves the removal of large amounts of soil and rock to access the quartz deposits. This method is used when the quartz is found close to the surface. Heavy machinery such as excavators and bulldozers are used to remove the overburden (the soil and rock overlaying the quartz).
- Hard Rock Mining: In cases where quartz is found in veins within rock formations, hard rock mining methods are employed. This involves drilling and blasting to break up the rock and access the quartz veins. The material is then transported to the surface for processing.
- Underground Mining: If the quartz deposits are located deep underground, underground mining techniques are used. Miners create tunnels and shafts to reach the deposits. This method is more labor-intensive and expensive than open pit mining but is necessary for accessing deep deposits.
- Placer Mining: This method is less common for quartz but can be used in riverbeds and stream deposits where quartz particles have been eroded and deposited. It involves washing and sifting through gravel and sediment to extract the quartz.
Open pit mining and hard rock mining can cause significant land disturbance and environmental degradation, including deforestation, habitat destruction, and soil erosion. Proper environmental management practices and reclamation efforts are essential to mitigate these impacts.
We aren't talking about sand.
The production of the current global output of solar cells require from somewhere between 8-10 million metric tons of coal annually.
> The production of the current global output of solar cells require from somewhere between 8-10 million metric tons of coal annually.
Totally disingenuous comparison. You don't get to use the existing energy source's coal requirements to criticize the energy usage of the replacement energy source.
"We can't replace coal power! Think how much coal we'll burn building the replacement for coal power!"
The mining of quartz typically involves several methods depending on the nature and location of the deposit. Here are the common methods used:
- Open Pit Mining: This is the most common method for mining quartz. It involves the removal of large amounts of soil and rock to access the quartz deposits. This method is used when the quartz is found close to the surface. Heavy machinery such as excavators and bulldozers are used to remove the overburden (the soil and rock overlaying the quartz).
- Hard Rock Mining: In cases where quartz is found in veins within rock formations, hard rock mining methods are employed. This involves drilling and blasting to break up the rock and access the quartz veins. The material is then transported to the surface for processing.
- Underground Mining: If the quartz deposits are located deep underground, underground mining techniques are used. Miners create tunnels and shafts to reach the deposits. This method is more labor-intensive and expensive than open pit mining but is necessary for accessing deep deposits.
- Placer Mining: This method is less common for quartz but can be used in riverbeds and stream deposits where quartz particles have been eroded and deposited. It involves washing and sifting through gravel and sediment to extract the quartz.
Open pit mining and hard rock mining can cause significant land disturbance and environmental degradation, including deforestation, habitat destruction, and soil erosion. Proper environmental management practices and reclamation efforts are essential to mitigate these impacts.
We aren't talking about sand.
The production of the current global output of solar cells require from somewhere between 8-10 million metric tons of coal annually.