engineering fundamentals Discussion Forum
Directory | Career | News | Standards | Industrial | SpecSearch®
Home Membership Magazines Forum Search Member Calculators

Materials

Design

Processes

Units

Formulas

Math
List Recent Topics | Start a New Topic
 

<< Previous Message No. 15637 Next >>
Author: rhysy
Time: 03/22/05 15:04 PST
This is a reply to message no. 15635 by rorschach
Reply | Original Message | New Topic | List Topics | List Messages on This Topic
Current Topic:
How efficient is iron smelting ?
Fallout really isn't a problem and never really was. Freeman Dyson didn't like it, but on the numbers he calculated I really can't see why. There's just not enough radiaiton to kill anyone who wouldn't have died anyway. Someone calculated it's about the same dose you get from sleeping next to someone. (I'll try and check that at some point)

Since it's iron oxide that makes Mars red, there really has to be a lot of it in the soil. Ah... found a site :
""If you look at the soil composition of Mars, the one thing that really strikes you is that it's 5 to 14 percent iron oxide," said Dr. Peter Curreri, a materials scientist at NASA's Marshall Space Flight Center. "It's almost ore-grade material."
http://spacescience.com/newhome/headlines/msad03mar99_1.htm

So my 20% figure's a bit high, but not worryingly so.

Could probably make a high melting-temperature ceramic from the materials on Mars for the furnace walls, will look into that. I doubt the power requirments to evacuate the furnace will be significant in an atmosphere 1% of Earth's density.
[ List Replies to This Message Only ]

Home  Membership  About Us  Privacy  Disclaimer  Contact  Advertise

Copyright © 2017 eFunda, Inc.