That night, Luo Tian heard the sound of machines from time to time, and sometimes it was the sound of wind in the mountains. In his daze, he suddenly heard the sound of cheers. When he opened his eyes, it was already bright, Luo Tian secretly thought
Annoyed at myself for actually sleeping until the sun touched my butt on a crucial day, I got up quickly and went to find Lu Ming and Gang Leader Yang.
The two of them were waiting at the technical department to refine the sample gold and check the quality. Seeing Luo Tian coming over, Lu Ming said: "I knocked on the door once in the morning and saw no movement from you, so we came over first and now we have taken some of it."
Refining the gold ore, the results will be out soon.”
The equipment used in this refining method is very sophisticated and pays great attention to safety. Luo Tian did not come close to watch the excitement, but sat with the two of them and waited for the final result.
Ripe gold is gold that has been smelted and purified from raw gold. It is generally of higher purity and finer density. Some of it can be directly used in industrial production. Common ones include gold bars, gold nuggets, gold ingots and various jewelry and utensils.
Gold coins and industrial gold wires, gold sheets, gold plates, etc. Due to different uses, the required fineness is different, or because there is no purification equipment, it is only melted without purification, or the purity is not enough, resulting in gold of different fineness.
.People customarily divide cooked gold into three types: pure gold, red gold, and colored gold according to the level of fineness. Gold that reaches a very high purity after purification is called pure gold, and gold generally refers to pure gold with a fineness of more than 99.6%.
The meanings of red gold and pure gold are similar, but due to different times and places, the standards of red gold are different. Gold sold in the international market is called red gold with a fineness of 99.6%. However, red gold in China is generally 99.2%-99.6%.
between.
Colored gold, also known as "secondary gold" and "tide gold", refers to gold with lower fineness. Due to the different content of other metals, the fineness of these golds is as high as 99% and as low as only 30%. Depending on the content of other metals,
Divided, cooked gold can be divided into clear gold, mixed gold, engraved gold, etc. Clear gold refers to gold only mixed with silver components, regardless of the fineness, it is collectively referred to as clear gold. There are more clear golds, which are common in gold bars, gold
Ingots, gold nuggets and various utensils and gold jewelry.
Mixed gold means that in addition to silver, gold also contains copper, zinc, lead, iron and other metals. According to the type and quantity of metals contained, it can be divided into small mixed gold, large mixed gold, bronze and large mixed gold, including
Lead mixed with gold, etc.
Engraved gold refers to gold made from silver and copper in a certain proportion and according to the formula that pure gold is twenty-four gold. Generally speaking, the more silver the engraved gold contains, the greener the color; the greater the copper content, the purple-red color.
In the early days of liberation, China's gold engraving was calculated based on the standard of 4.15% per engraving. After 1982, it has been unified with the international standard, using 4.1666% per engraving as the standard. The addition of other elements to cooked gold causes the gold to change in color.
People usually refer to cooked gold with metallic silver but no other metals as "clear gold", and gold with silver and other metals as "mixed gold".
Lu Ming's fingers were tapping lightly on his body, which showed that he was anxious inside. Although Luo Tian looked calm, after all, he was an indirect beneficiary and did not need to bear the risks himself. However, after all, it was also related to his future competition methods, as well.
I have been looking forward to the final results.
The process of chemistry cannot be ignored. There is no other way except waiting. Luo Tian saw that the other two people were bored and said: "More than 200 BC, the Greek mathematician Archimedes once judged a crown.
He was worried about whether it was made of pure gold. While taking a bath in the tub, he discovered what later generations called Archimedes' law of specific gravity: an object immersed in a liquid is subject to an upward buoyant force; the buoyant force is equal to the weight of the liquid it displaces.
This has successfully confirmed whether the crown customized by the king is made of pure gold. This is the earliest method to determine the purity of gold."
"Nowadays, everything is a technological means." Lu Ming said: "Now in theory, gold with a content of 100% is called twenty-four gold; so the calculation method is 100/24: the national standard gb11887-89 stipulates that the gold content per moment
It is 4.166666%, 9 ticks=100/24*9=37.5% (375‰), 14 ticks=100/24*14=58.333% (585‰), for convenience of identification, it is set at 58.5%, 18 ticks=
100/24*18=75% (750‰), 22 ticks=100/24*22=91.666666% (916‰), for the convenience of labeling, it is set at 91.6%. In theory, 100% gold can be called
Twenty-four gold, but in reality it is impossible to have 100% gold, so China stipulates that gold with a content of more than 99.6% (including 99.6%) can be called twenty-four gold. The gold content of these types of engravings is
General specifications for jewelry, the state stipulates that gold jewelry with less than 9 carvings cannot be called gold jewelry."
Gang Leader Yang took a deep breath: "Now it depends on how many carvings of gold it is."
"Yes." Lu Ming said: "The previous official announcement was more than 22 minutes, but we don't know whether there is water or not. What we are doing now is the final verification. It would be best if it is 24 gold."
"There must be no problem." Luo Tian regretted why he woke up. The process of waiting for the results was the most difficult. Now this kind of suffering makes time pass extremely slowly. People's state of mind can actually affect time. It is really
An incredible thing happened. Luo Tian raised his hand and looked at the time. Before he knew it, it was already noon. Although he didn't have breakfast, Luo Tian didn't feel hungry at all. He just extracted a little sample of gold to judge the quality.
That's all, why is it so long?
Luo Tian closed his eyes and waited for the cooked gold to appear. Finally, half an hour later, the sample gold was finally extracted. A technician loaded the gold on a tray and said, "Director Lu, Gang Leader Yang, sample gold.
The gold came out, it was twenty-four pieces of gold."
"Thousands of pure gold?" Luo Tian opened his eyes and looked towards the tray. The small piece of gold on the tray was bright golden yellow. Luo Tian moved his finger on it and made a small mark on it.
, and weighed it in his hand: "A thousand pure gold, a thousand pure gold."
The technician looked at Luo Tian's skillful hands and said, "This gentleman is an expert in the industry. We have tested it and found that it is pure gold."
"Great." Lu Ming and Gang Leader Yang breathed a sigh of relief at the same time.
Luo Tian walked over: "How about taking a step back and talking?"
The three of them laughed at the same time. It was officially time to discuss the contract. When they arrived at the temporary office, Luo Tian took out the original agreement with Gang Leader Yang: "This is the agreement between me and Gang Leader Yang. I hope it will last until now."
It is effective."
"Of course it works." Gang Leader Yang said, "I'm a gangster and I know a word of faith."
Lu Ming suddenly said: "But, I still have one condition."
"Although, business is meant to be negotiated." Luo Tian looked at Lu Ming. In terms of business, Lu Ming had obviously dominated Gang Leader Yang more than once. If he was talking about being a gangster, Hu Hai was Gang Leader Yang's strategist.
In business, Lu Ming is his military advisor. Now, this military advisor is about to play a role. Let's see what he has to say.