_DARC - Viking Age Presentation                             June 11, 2005 

           

Experiment Notes - Norse Short Shaft Smelter

 

Leader :           Darrell Markewitz

Assisting :       Kevin Jarbeau / Dave Cox

Recorders :      Neil Peterson / Karen Davidson

Charcoal Monkey :  Ken Cook

Animal Wrangler : Vandy Simpson

 

TIME                          EVENT                                   MEASUREMENT                            

Relative   Elapsed                                                       Relative           Absolute         Total

                                                                                    Fuel     4 lbs*                          Ore

           

-00       .00       start preheat with wood splits          

-1.00    1.00     addition rough charcoal, gentle air blast

 

0:00                 timer reset - smelt begins       

0:33     33        first measured charcoal                       1          4 lbs   

0:44     11        charcoal                                               2          8 lbs

0:59     15        charcoal                                               3          12 lbs

 

1:09                 seed charge                                                                              1          .75 lbs*           .75 lbs

1:16     17        charcoal                                               4          16 lbs

1:26     16        seed charge                                                                              2          .75 lbs             1.5 lbs

1:34     12        charcoal                                               5          20 lbs

1:42     16        seed charge                                                                              3          .75 lbs             2.25 lbs          

1:50     16        charcoal                                               6          24 lbs

1:59     17        seed charge                                                                              4          .75 lbs             3 lbs

2:08     18        charcoal                                               7          28 lbs

2.24     25        seed charge                                                                              5          .75 lbs             3.75 lbs

2:27     19        charcoal                                               8          32 lbs

 

2:33                 switch to electric blower

                        rate at D (815 L/M)

 

2:37     10        charcoal                                               9          36 lbs

2:47     10        charcoal                                               10        40 lbs 

            23        full charge                                                                                6          1.5 lbs             5.25 lbs

2:56     9          charcoal                                               11        44 lbs 

                        full charge                                                                                7          1.5 lbs             6.75 lbs

 

                        air rate at B+ (625 L/M ┤)

 

3:08     12        charcoal                                               12        48 lbs

                        half charge                                                                               8          .75 lbs             7.5 lbs

3:19     9          charcoal                                               13        52 lbs 

                        full charge                                                                                9          1.5 lbs             9 lbs

 

3:24                 slag tap

 

3:31     12        charcoal                                               14        56 lbs

                        full charge                                                                                10        2.25 lbs           11.25 lbs

3:41     10        charcoal                                               15        60 lbs

                        full charge                                                                                11        2.25 lb             13.5 lbs

 

3:50     26        slag tap

 

3:53     12        charcoal                                               16        64 lbs 

                        full charge                                                                                12        2.25 lbs           15.75 lbs

4:04     11        charcoal                                               17        68 lbs

                        full charge                                                                                13        1.5 lbs             17.25 lbs

4:16     12        charcoal                                               18        72 lbs

                        full charge                                                                                14        3 lbs                20.25 lbs

4:33     17        charcoal                                               19        76 lbs

                        full charge                                                                                15        3 lbs                23.25 lbs

4:46     13        charcoal                                               20        80 lbs

}

                        half charge                                                                               16        .75 lbs             24 lbs

4:59     13        charcoal                                               21        84 lbs 

 

                        begin burn down phase

 

5:17                 air flow reduced to minimum 

                        remaining charcoal removed

 

5:28                 bloom removed

 

NOTES:

            Charge times recorded at END of unit addtition

 

*          All charcoal charges are based on a ´standard pail═ - weight of 4 lbs

            All ore charges are based on a ´standard scoop═ - weight of 3/4 lbs

 

          Estimated from known marks

 

YIELD:           7 lbs (estimated)

                        About 30% return on ore weight