XPost: sci.space.policy, sci.physics   
      
   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.   
      
   --   
   Jim Pennino   
      
   --- SoupGate-Win32 v1.05   
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