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Tales of Mountain Life 32: Father Makes Charcoal 2/2
< This series is
a work of fiction based on a real family that lived in a mountain village after the war. >
Table of Contents
Day 2: Pre-drying Continues
Day 3: Carbonization of the Charcoal Material Begins
Day 4: Refining
Sealing the kiln... airtight
Unloading the kiln
Day 2: Pre-drying Continues
Father observed the color and smell of the smoke coming from the chimney,
then opened the chimney slightly and added small twigs for fuel.
Before long, the smoke turned into white steam containing water vapor,
but the charcoal material still needed more time to dry.
He needed to slowly raise the temperature of the entire kiln to 400°C
so that only the fuel twigs would burn, and the charcoal material would turn into charcoal without burning away.
If there is too much oxygen, the temperature will get too high, and the charcoal material will burn and turn to ash.
On the other hand, if the temperature is too low, it will be undercooked.
He adjusts the oxygen using the air vent below the firebox and the opening of the chimney.
Day 3: Carbonization of the Charcoal Material Begins
Yellow smoke began to spew from the chimney.
It had a harsh, sour, and strong smell.
The charcoal material was being heated and had begun to turn into charcoal.
He stopped adding fuel twigs and blocked the firebox.
He kept the air vent narrowed.
The work of adjusting the temperature while watching the smoke continued.
He couldn't take his eyes off it, sometimes blocking the chimney slightly with an empty can, and other times opening it fully.
When the charcoal material turns into charcoal, he wants to keep the temperature as low as possible, around 400°C.
Grandpa from Mother's side of the family came to check on things.
He is Father's mentor in charcoal making.
The mentor says,
"Don't rush. Charcoal making is slow, slow.
You're a bit short-tempered, you know..."
I haven't heard that the mentor himself is particularly patient, though.
Day 4: Refining
The wood gas accumulated inside the kiln is burned, and impurities remaining in the charcoal are removed at a high temperature of 1000°C. This is the final process called refining.
The smoke has turned white. It is billowing out in large quantities.
As more time passes, the smoke from the chimney has taken on a bluish tint. When I open the firebox and peek inside the kiln, the charcoal material is glowing red. So, I open the narrowed air vent to let in oxygen and begin the refining process.
Looking inside the kiln, I can see flames making a sound like an animal growling. What is burning is the wood gas released from the charcoal material. The hot air of the gas, which explodes upon reacting with oxygen, raises the temperature of the kiln to over 1000°C and burns away the impurities remaining in the charcoal material.
Since there is no oxygen in this hot air, the charcoal material does not burn into ash. This work will take about 8 hours.
That flame and blue smoke are also blowing out from the air vent of the firebox.
This backflow of blue smoke, called 'fukikaeshi' (blowback), is proof that the gas is swirling and exploding as it takes in oxygen, and if this does not happen, it will not become good charcoal.
Good charcoal has no impurities and produces neither smoke nor odor when lit.
However, Yuki-chan, who came to check on things after school, was terrified.
I can't believe it's like this inside the kiln... It's hot! It's scary!
"It's so scary!"
But I want to see... "Stay back. Stay further back!" Even though Father yelled at me, I couldn't take my eyes off it.
Grandpa also told me, "Stay still in the back." Grandpa has been staying over since last night to keep an eye on things.
By the time evening came, the smoke turned pale blue and eventually became like a transparent heat haze.
The charcoal material inside the kiln changed to a reddish-white color all the way to the bottom, and the animal-like growling sound stopped.
When I poked a stick through the ventilation hole and knocked over the charcoal material,
a hard, metallic sound of "clatter, jingle" echoed inside the kiln.
The charcoal was finished.
After confirming that, Grandpa went home.
Sealing the kiln... airtight
Father blocked all the air inlets and outlets, such as the chimney, the firebox, and the ventilation holes,
and returned with a tired face after it had gotten quite dark.
The charcoal hut across from our house was now quiet and still, with no smoke,
and all that was left was to wait for the charcoal to completely extinguish.
Tonight, Father can finally get a good night's sleep.
Unloading the kiln
Two weeks after lighting the fire
Father took the finished charcoal out of the kiln,
and went back and forth between the charcoal hut and our house many times to stack it in the shed.
It feels strange that the terrifying kiln, which had been burning bright red,
is now completely silent.
"You made some good charcoal."
Mother, smiling,
lit the shichirin stove with the freshly made charcoal,
and is making Father's favorite curry.
Yuki-chan is drawing an early bath
for Father, who has become covered in soot.
The baby, Fumi-chan, is happily sucking on her fingers.
Winter is almost here.
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