Data & Resultspage updated: Oct. 5, 2000

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Yield comparison of our smelting experiments The recipe for each experiment is available, visit the diary pages listed here. Diary for smelt 12-20 (not completed yet) Diary for smelts 21- 27 Diary for smelts 28 - 38

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Summary of Smelting Experiments

Link to Smelt Diary

Preheat time

Fuel:Ore Ratio (during charge)

Total Ore (lbs)

Gromp &Recycled Slag (lbs)

Tap Slag Recharged (lbs)

Total Flux (lbs)

Air Flow

Smelt Time (first to last charge)

Post Heat time(includes slag recharging)

Total Time

Bloom Weight

Notes:

Furnace Configuration #2 - tall shaft or low shaft - without preheater

12

4:30

6:5

75 lbs Dixie Goethite

7.5 Limestone

24cfm 680 l/min

4:00

2:30

11:00

40 Lbs.

tall shaft

13

5:00

3:2

60 lbs. Dixie Goethite

8 lbs. Limestone

26cfm 736 l/min

1:50

2:10

9:00

23 lbs.

tall shaft

14

3:30

8:5

80 lbs.

3 lb clay 3 lb Limestone

57 cfm 1614 l/min

2:00

1:40

7:10

20 lbs.

tall shaft

15

4:00

1:1

75 lbs.

none

43 cfm 1217 l/min

2:10

1:30

7:40

18 lbs.

tall shaft

16

2:50

1:1

75 lbs.

21 lbs bloombits and slag

9 lbs. Limestone

3:40

20 lbs.

tall shaft very dense bloom (see picture) low carbon content

17

2:40

1:1

117 lbs.

11 lbs. Limestone

3:30

18 lbs.

low shaft tap slag recharged

18

3:00

1:1

126 lbs.

20 lbs. bloombits and slag

yes

10 lbs. limestone

3:05

1:05

7:10

25 lbs.

low shaft height. tap slag recharged

19

2:55

1:1

120 lbs.

10 lbs bloombits and slag

yes

9 lbs. limestone

4:45

1:05

8:45

25 lbs.

tall shaft, misc. ore

Furnace Configuration #3- low shaft with preheater

20

3:00

1:1

105 lbs.

15 lbs. slag

10

8 lbs.

700-1125 l/min

3:20

3:00

9:20

13 lbs.

low shaft with preheater\Glenwood ore

21

1:25

6:5

80 lbs.ore

10 lbs. bloombits and slag

yes

~ 12 lbs

1125-1275 l/min

1:55

2:00

5:20

23 lbs.

SEE JOURNAL

22

1:38

6:5

75

15

13

6 lbs

1275-1625 l/min

2:06

2:32

6:16

33 lbs

produced high calcium slag and low carbon iron

23

1:35

1:1

105

41

none

1275-1500 l/min

2:00

2:45

6:20

40 lbs

24

1:40

1:1

101

13

46

none

1275-1500 l/min

1:55

2:25

6:00

28 lbs

very low carbon content- late ore charge added to decarburize

25

1:28

1:1

89

13

32

none

1275-1625

1:30

2:32

5:30

31 lbs

med/low carbon Picture of bloom

26

1:30

1:1

90

10

41

none

1275-1625

2:15

2:50

6:35

29 lbs

in Flagstaff AZ, at 7000 ft, dense, low carbon

27

1:45

1:1

102

10

28

none

1275-1625

2:23

2:47

6:55

32 lbs

also in Flagstaff, high carbon steel

 

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Yield Analysis

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Smelt #	Total Ore	Bloom wt.	Yield*	Billet wt.	Yield	Bar wt.	Yield
12	75 lbs	40 lbs	106%	22 lbs.	59%
13	60 lbs.	23 lbs.	77%	10 lbs.	33%
14	80 lbs.	20 lbs.	50%			11 lbs.	28%
15	75 lbs.	18 lbs.	48%	10 lbs.	27%
Crew xp27	16.7	3.74 lbs.	40%	1.94 lbs.	21%	1.38 lbs.	15%

*Note: In this table we have followed the conventions of Tylecote and Crew of expressing our results as a percentage of iron available in the ore. Historical and contemporary analyses indicate that this ore averages 50% Iron content by weight.