The Industrial Blast Furnace was the first GregTech 100% Lagfree Multiblock Machine. It is designed as a higher-tech version of the conventional Furnace. Its job is to unlock the higher areas of the tech tree, by allowing you to smelt Steel, Aluminium, Titanium, Chrome, Silicon Plates, Tungsten, and Tungstensteel. It also contains recipes for Galena Dust, and more efficient recipes to convert Iron Ore directly into Iron.

The Recipes available to an Industrial Blast Furnace are dependent upon its Heat Capacity, a statistic unique to the Industrial Blast Furnace. Heat Capacity refers to how high of temperatures the Furnace can reach, is determined by the construction of the Blast Furnace, and determines what recipes are available to the Furnace. This also makes the Industrial Blast Furnace the centerpiece of the GregTech tech tree, as its level of development shows and governs what resources are available for you to use.

Large tech advances are are at 1700K, 2000K, which allow the player to smelt Titanium and Stainless Steel, respectively. Titanium smelting enables construction of a Silk Touch Rock Cutter, and Stainless Steel smelting enables construction of the Industrial Centrifuge, which further enables construction of a Thermal Centrifuge. Each of these machines allow many resources (metals, fuels, and rare materials) to be obtained more efficiently or via alternate means. A player with more time than resources (even AFK time) could opt to use one or more Bronze Blast Furnaces to make enough steel to start at a 1700K or 2000K Industrial Blast Furnace, exchanging that additional time to save materials.

Maximum EU/t Input
128 EU/t (MV)
Minimum EU/t Input
120 EU/t
If less than 120/t is available from the combination of this machine's power input and power buffer, all progress will be lost and any further EU that does not total 120/t will be completely wasted.
Note: Certain recipes may consume more than 120EU/t. In order to carry out these recipes, install either Transformer Upgrades, Storage Upgrades, or both.

Recipe:

Blast Furnace Recipe.png
4x Cupronickel Heating Coil
2x Electronic Circuit
2x Induction Furnace
1x Steel/Stainless Steel Machine Hull

Construction:

Construction of a GregTech Industrial Blast Furnace requires one Industrial Blast Furnace (block) and 34 Machine Casings (any), in a 4-block high hollow 3x3 box. The I. Blast Furnace block is placed on the bottom, in the center of any of the 4 sides, with its back facing the Casings. The higher grade Machine Casings have increased Heat Capacity over the lower ones. Machine Casings in a Blast Furnace may be broken and replaced with higher grade Machine Casings to increase the Furnace's Heat Capacity. This allows you to, over time, upgrade the capabilities of your Industrial Blast Furnace, as superior materials become available and are needed. Unlike GregTech machine blocks, Machine Casings cannot be wrenched, and in stead are broken with an Iron Pickaxe.
In addition to the Machine Casings, there are two other ways you can increase the Heat Capacity of an Industrial Blast Furnace:
1) The two hollow (air) blocks inside the Machine Casings can be filled with Lava. Each of these Lava blocks will increase the maximum Heat Capacity of the furnace by 250K.
2) Application of Kanthal and Nichrome Heating Coils to the Industrial Blast Furnace block. (See the Upgrades section below)

Example Blast Furnace Build.png
Example of Construction

Heat Capacity by Machine Casings

Machine Casing
Heat Capacity
Maximum Heat Capacity
Standard
+30
1020
Reinforced
+50
1700
Advanced
+70
2380
(assuming no Lava interior)

Amount of Machine Casings required for important heat levels (assuming lava interior)
Heat capacity
Standard
Reinforced
Advanced
1500 (Galena, Titanium, Iron Ore, Silicon)
34
0
0
1700 (Aluminium, Chrome)
25
9
0
2000 (Stainless Steel)
10
24
0
2500 (Tungsten, Kanthal)
0
19
15

Accepted Upgrades:
Overclocker
Transformer
Battery
Minecraft Joules (MJ)
Steam
Special

Special Upgrades:
Kanthal Heating Coil x4
Increases Heat Capacity by 500K
Nichrome Heating Coil x4
Increases Heat Capacity by 500K
When using Kanthal and Nichrome Heating Coil upgrades, the Kanthal Heating Coils must be applied before the Nichrome Heating Coils. To apply these upgrades, simply hold 4 of the relevant Coils in your hand, and Right Click on the Industrial Blast Furnace block. Like all GregTech upgrades, the Blast Furnace will keep these upgrades when wrenched.

Note that Kanthal Heating Coils cannot be crafted without 2500K Heat capacity. While Nichrome Heating Coils are made using the Alloy Furnace, they cannot be applied without the Kanthal Heating Coil upgrade.
To achieve a Heat Capacity of 3000K, required for Tungstensteel, construct a Blast Furnace with a Heat Capacity of 2000K, and apply a set of Kanthal and Nichrome Heating Coils. Note that you MUST apply at least one set of Heating Coils in order to reach 3000K.

Recipes:

Note 1: The colour of the EU Needed value indicates the EU/t consumed. Green: 120EU/t, Yellow: 500EU/t.
Note 2: Hot Ingots must be cooled in a Vacuum Freezer to become usable.
Note 3: The Industrial Blast Furnace will accept Dirty/Purified Dusts and Crushed Ores for the dusts listed below; however the EU costs and time are 14x higher.
Input 1
Input 2
Time
(Seconds)
EU
Needed
Heat Capacity
Needed
Output 1
Output 2
Silicon Dust x1

75
180,000
1500K
Silicon Ingot x1

Iron Ingot x1
Coal Dust x2
25
60,000
1000K
Steel Ingot x1
Dark Ashes x2
Tungsten Ingot x1
Steel Ingot x1
25
250,000*
3000K
Hot Tungstensteel Ingot x2
Dark Ashes x4
Galena Dust x2

20
48,000
1500K
Silver Ingot x1
Lead Ingot x1
Iron Ore x1
Calcite Dust x1
25
60,000
1500K
Iron Ingot x3
Dark Ashes x2
Pyrite Ore x1
Calcite Dust x1
25
60,000
1500K
Iron Ingot x2
Dark Ashes x2
Aluminium Dust x1

85
204,000
1700K
Aluminium Ingot x1

Tungstensteel Dust x1

300
720,000
3000K


Titanium Dust x1

75
180,000
1500K
Titanium Ingot x1

Chrome Dust x1

85
204,000
1700K
Chrome Ingot x1

Tungsten Dust x1

500
1,200,000
2500K
Hot Tungsten Ingot x1

Steel Dust x1

50
120,000
1000K
Steel Ingot x1

Kanthal Dust x1

125
300,000
2500K
Hot Kanthal Ingot x1

Stainless Steel Dust x1

85
204,000
2000K
Stainless Steel Ingot x1