According to Xia Lin's memory, both crucibles were able to withstand considerable temperatures, and the glass was usually fired in crucibles, so it was perfect for them to be used on this occasion.

After the workers finished the renovation of five furnaces, added a grading regenerator to four of them, transformed another into an annealing kiln, and prepared pig iron molds and various tools for making glassware, Xia Lin led four groups of R&D personnel to start the formal firing of glass.

In his memory, he has a full set of glass firing processes from the forum, including material selection, proportioning, crushing, firing, observing the fire, removing bubbles, removing colors, molding, and blowing, all of which are perfect and complete.

The first is the selection of materials, the use of purification technology after the purification of diatomaceous earth, caustic soda and lime according to the proportion in his memory to complete, Xia Lin transferred a ball mill from the cement plant to crush these raw materials into uniform and fine granules.

If the particles are too coarse, it will lead to uneven texture of the melted glass slurry and the quality of the finished product will be greatly reduced; If it is too fine, it will make the reaction of the raw material too strong, resulting in a large number of fine bubbles in the finished product.

Xia Lin crushed the raw material into granules with a particle size of about 2-3, and then had it packed into four crucibles as a control, two of which were silicon crucibles and the other two were magnesium crucibles.

After the packing is completed and the furnace is ignited, the bellows begin to agitate continuously as the waterwheel rotates, and the oxygen from the multi-stage air separation chamber passes through the skin pipe into the regenerator.

The combustion of coal below the regenerator heats this air, and the negative pressure provided by the towering chimney of the furnace introduces this heated oxygen into the furnace itself, where it begins to react with the coal to produce high heat.

Through the narrow observation hole, Xia Lin observed that the raw materials in the crucible had already shown signs of melting, but inside the furnace, which was close to blazing yellow in color, Xia Lin could not see whether the raw materials had formed bubbles inside.

The two most critical quality factors for glass are bubbles and color, complex bubbles can damage the strength and aesthetics of glass, and color will affect the use of glass.

However, Xia Lin didn't have a good way to do this, so he could only set his mind to let people follow the predetermined steps, step by step, to continue to heat the melt, according to his memory, continuous heating of the glass melt can help the small bubbles at the bottom of the melt to converge into large bubbles, so as to take away more bubbles during the rise.

However, this method also has limitations, that is, the glass paste will be heated for too long, which will cause the basic components in it to volatilize, and then the viscosity will rise, which will lead to the formation of bubbles, so he has to estimate the heat of the glass paste according to his own intuition.

After about six hours, Xia Lin asked people to reduce the fire and open the furnace door, but the two silicon crucibles in the four furnaces had an unexpected situation, which actually softened and deformed under the condition of high heat for a long time, and the glass slurry contained in it also leaked out, forming a blazing red streamline in the furnace.

"Is it true that silicon crucibles can't withstand temperatures of 1,600 degrees Celsius?"

Xia Lin asked his assistant beside him to make a note of this phenomenon, but fortunately, the magnesium crucibles in the other two furnaces did not have this problem, and the glass slurry inside was as good as a calm lake.

….

After the furnace door was completely opened, Xia Lin asked people to fetch some blowpipes specially made by the steel processing plant, which were actually a one-meter-long seamless steel pipe with a slightly curved material picking surface at one end, and a thick wooden handle at the other end to prevent burns.

Under the surprised eyes of the assistants and employees beside him, Xia Lin tried to use this blowpipe to pick a ball of glass paste from the crucible, and then rolled it on the polished smooth iron plate on the side, making the shape of the glass paste more uniform and round.

The blowpipe more than one meter long could not completely isolate the heat brought by the glass slurry, just holding Xia Lin felt like he was being roasted on the stove, so he simply followed the steps in his memory, and blew the blowpipe vertically against the blowpipe.

Xia Lin's physical fitness is quite good, and his lung capacity is also very good, as he blows, the glass slurry gradually expands, and the temperature is rapidly lost, and the color is blazing

The red gradually turns to blazing yellow, then orange-red, and finally to a surging green.

This magical process made the surrounding employees amazed, but Xia Lin was not lightly tired, mainly because the blowpipe was too short, and the glass slurry was like a ball of fire constantly burning himself in front of him.

As soon as the blow fell, Xia Lin felt that his hair was about to be scorched, and the wooden handle he held in both hands also felt quite hot, so he had to use a frost technique to lower the temperature around him.

"That's pretty much it, go get the mold!"

Wiping the sweat from his forehead, Xia Lin asked people to bring a pig iron mold, in which several layers of newspaper were padded, and after putting the glass paste into the mold, the newspaper suddenly burned, and Xia Lin used the lubrication of the gas layer produced by the combustion to turn the almost formed glass while blowing, and finally got a cylindrical strange vessel with an elliptical upper ellipse.

By cutting off the irregularities in the top half of the vessel with a sawing machine, Xia Lin finally got his first glass container in the world, an ordinary flat-bottomed beaker.

"It's such a beautiful crystal cup, just looking at this cup, you wouldn't have thought it was actually made of a pile of sand and stones!"

Wheeler, the director of the caustic soda plant, watched for a long time, and finally saw the finished glass, looking at this crystal clear glass beaker, Wheeler exclaimed, and the employees on the side were also amazed, full of sighs at the magic of turning sand and stone into crystal performed by Xia Lin.

"It's a glass, not a crystal glass, and it's not a good quality at all!"

However, Xia Lin shook his head quite dissatisfied, there are still quite a few fine bubbles inside this glass beaker that have not been eliminated, and the color is not completely transparent, but with a little green, in addition, the texture is not particularly uniform, the bottom is thick and thin, if it is used for experiments, it will not take long to break.

The problem of color is easy to solve, the green should be the color of ferric ions, only need to add oxidant to turn it into yellow, in the case of low ion concentration, the yellow will not be particularly conspicuous, this glass has been able to meet the basic requirements of transparency.

As for bubbles, there was no problem, Xia Lin quickly thought of the clarifying agent mentioned in the glass recipe on the forum, that is, white arsenic and sodium nitrate, these two agents can be mixed to remove most of the bubbles generated in the glass, and then add a stirring process should be able to get the clarified glass slurry.

It's just that white arsenic is toxic and will sublimate into a gaseous state under heating conditions, and Xia Lin also has to consider the safety of operators.

However, there is no good way to solve the problem of texture, the quality of blown glassware has a great relationship with the skill level of the blowing worker, and a skilled skilled worker is obviously not so easy to train.

Xia Lin thought about it, and could only take the method of recording the blowing process and standardizing the blowing process through these process data to obtain the highest quality glassware as much as possible.

Having asked his assistant to memorize a lot of things bit by bit, Xia Lin looked at the glass slurry in the two furnaces and picked out a few employees for them to try out the feeling of blowing glass.

He put the shoddy beaker in a nearby annealing kiln and annealed it slowly to enhance the mechanical properties of the glassware.

My Magical Industries.

Misaka clucking chicken