Chemistry
Mining with minibots and mirrors needs a plan.
Recyclers do a lot of automatic sorting. What are the ways?
On Earth there are storage tanks, processing tanks, gas storage tanks. They buffer production of materials before consumption. Can we go direct and have no stores at the site? Or are the raw materials scattered and need different handling at different places. Water is local, for example.
(BBC) with any mine it can take up to 50 years before you have a decent production describes mining in Greenland in the cold. Our process has to be automated and exponential and rapid. Conventional mining is not going to get that.
A swarm mirror weighs around 5g/m2, we start assuming a 1km2 mirror which has the additional function of a sail when needed, 3x payload, roughly 20 tonnes mass per mirror. So the swarm weighs 4E18kg which is 0.1% of the mined ore. That is a hint of the extraction efficiency required at the refinery. Given the geology of the host with a lack of water transport we are not going to find the concentration of ores normally searched for on Earth.
It is unlikely that unmanned conventional commercial-style refining of undifferentiated (or at least unexplored and unspecified) ore will produce clean products useful for manufacture. We need to create an all-purpose one-stage process which fills reserves with pure elements. Given an energy source and superconducting magnets we can do that.
- transform raw material to charged plasma
- pass through large mass spectrometer
- catch elements in traps
If the traps can produce quantized shaped weights then we have the basis of an engineering feedstock.
I would hope that atomic construction of minibots from very similar directed charged atom streams solves the manufacturing process. This is standard 3D printing, but with atoms rather than inkjet heads. The same mass spectroscope manipulation is being repurposed. If we can scale the concept to get 1% of the host fed atom by atom over magnets and charged plates, we have gone a long way toward a successful prototype. Having a vacuum at the surface is a major advantage.