Development history abroad

Release time：

2022-05-20 09:30

In 1940, Luxembourg scientist W.J.Kroll obtained pure titanium by reducing TiCl4 with magnesium. Since then, the magnesium reduction method (also known as the Krauer method) and the sodium reduction method (also known as the Hunter method) have become the industrial methods for producing sponge titanium. In 1948, the United States produced 2 tons of titanium sponge by the magnesium reduction method, and the industrial production of titanium began.
In 1947, people began to smelt titanium in factories. That year, the output was only 2 tons. Production surged to 20,000 tons in 1955. In 1972, the annual output reached 200,000 tons. The yield strength of titanium is higher than that of steel, and its weight is almost half of that of steel of the same volume. Although titanium is slightly heavier than aluminum, its yield strength is twice that of aluminum. The specific strength of titanium is higher than that of aluminum and steel, and the specific modulus is very close to that of aluminum and steel. In space rockets and missiles, a large number of titanium is used instead of steel. Because titanium is very strong and can withstand high pressure, people began to use titanium to make submarines - titanium submarines. This submarine can sail in deep seas up to 4,500 meters.
According to statistics, the world's annual titanium used for space travel has reached more than 1,000 tons. Very fine titanium powder is also a good fuel for rockets, so titanium is known as cosmic metal and space metal.

Content distribution

By the end of 1995, the world's rutile (including anatase) reserves and reserve base were 33.3 million tons and 164.4 million tons respectively, and the total resources were about 230 million tons (TiO2 content, the same below), mainly concentrated in South Africa, India, Sri Lanka, Australia. The world's ilmenite (TiO2) reserves and reserve base are 274.3 million tons and 435.3 million tons respectively, with a total resource of about 1 billion tons; mainly concentrated in South Africa, Norway, Australia, Canada and India.

2021

04-19

Application of Titanium Alloy

Titanium is corrosion-resistant, so it is often used in the chemical industry. In the past, stainless steel was used for the components in chemical reactors that contained hot nitric acid. Stainless steel is also afraid of the strong corrosive agent - hot nitric acid. Every six months, this kind of parts must be replaced. Making these parts out of titanium, while a little more expensive than stainless steel parts, can last five years and is far more cost-effective to calculate.

2021

04-19

Smelting method

The raw material for preparing metal titanium is mainly rutile, which contains more than 96% TiO2. Countries that lack rutile ore, such as the Soviet Union, use "high-titanium slag" made of ilmenite, which contains about 90% TiO2. Due to the rising price of natural rutile and the decreasing reserves, all countries tend to use ilmenite to make titanium-rich materials, namely high-titanium slag and artificial rutile. Titanium was discovered in 1791, and the first pure titanium was made in 1910, more than a hundred years later. The reason is that titanium is very active at high temperature, and it is easy to combine with oxygen, nitrogen, carbon and other elements, and very harsh conditions are required to extract pure titanium.

2021

04-19