XPost: sci.space.policy, sci.physics   
   From: invalid@invalid.com   
      
   On 10/17/2016 1:19 PM, jimp@specsol.spam.sux.com wrote:   
   > In sci.physics Serigo  wrote:   
   >> On 10/15/2016 6:07 AM, Fred J. McCall wrote:   
   >>> jimp@specsol.spam.sux.com wrote:   
   >>>   
   >>>> In sci.physics Vaughn Simon  wrote:   
   >>   
   >>>> What I am saying is that turning dirt into structural steel or   
   >>>> structural aluminum takes a lot of energy which you are NOT going   
   >>>> to get from wind or solar on Mars.   
   >>>>   
      
   >>> Wrong.  It doesn't require anything close to 50 MW.  As I pointed out   
   >>> elsewhere, producing a ton of steel from ore takes about 5 MW-hrs of   
   >>> power, all told.  Unless I need to produce 10 tons of steel per hour I   
   >>> don't need a reactor anywhere near as big as what you keep proposing.   
   >>>   
   >>>   
      
   >>        do you know how silly and insane that sounds ?   
   >>   
   >> You are proposing to set up an entire steel factory on Mars, and use 5   
   >> MWhrs to produce 1 ton of steel from "ore".   
   >>   
   >> so where did you get your coke ?   
   >> Iron Ore ?   
   >> Limestone ?   
   >> O2 ?   
   >> Manganese?   
   >> Phosphorous ?   
   >> Sulfer?   
   >> Silicon ?   
      
   >> How heavy is the container holding 1 ton of liquid steel ?   
   >>   
   >> How big and heavy is your rolling mill ?   
   >>   
   >> How big and heavy is your soaking pit ?   
   >>   
   >> How big and heavy are your handling tools ?   
   >>   
   >> how big and heavy are your processing tools and factory ?   
      
   >> Mars surface dirt is more radioactive than Earth's dirt, so will your   
   >> "Mars Steel" be.   
      
   > It is 10-19 MW-hrs from ore to one ton of steel, not counting fabrication   
   > into usefull stock.   
   >   
   > A ton of steel is a tivial amount. I have over a half ton of steel just   
   > in the various things I have built around the house and I'm not building   
   > any buildings.   
   >   
      
   1 ton of steel  = 4 cubic feet, or 1 foot by 2 foot by 2 foot.   
      
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