Under COVID-19, demand for tungsten alloy shielding in medical CT equipment is increasing. Many manufacturers are increasing the output of tungsten alloy shields needed for medical imaging equipment CT, such as tungsten alloy anti-scatter grids, tungsten alloy plates, tungsten alloy tubes and tungsten alloy collimators (pre-patient collimators and post-patient collimators), to support the CT examination during the epidemic of the novel coronavirus (COVID-19).

Tungsten heavy alloy medical collimator is one of the typical radiation shielding applications of tungsten heavy alloy in the case of X-ray diagnostics. Wherein, tungsten alloy collimators are in the detector system of a medical electron linear accelerator.

Radiation shielding tungsten alloy plate is a new type of lead-free shield. Tungsten alloy plate is mainly used for radiation protection in radiology departments such as X-ray rooms and CT rooms as it has a good shielding effect on X-rays and γ-rays.

W-Ni-Cu alloy protective screen, or tungsten nickel copper alloy protective screen, is a new type of lead-free medical radiation shielding screen. The biggest difference between tungsten nickel copper alloy protective screen and tungsten nickel iron alloy protective screen (W-Ni-Fe alloy protective screen) is that W -Ni-Cu alloy is non-magnetic, so that it can be used in the field sensitive to the magnetic environment, and then exert its unique anti-interference advantages.

Tungsten alloy X ray shielding device is a device for effectively shielding the X-rays emitted by the CT machine. There are shielding materials such as tungsten alloy plates and tungsten rubber blankets on such a radiation shielding device. CT machine is developed from X-ray machine, and its resolution and qualitative diagnosis accuracy rate are much higher than that of general X-ray machine, thereby broadening the adaptability range of X-ray examination and greatly improving the accuracy rate of X-ray diagnosis.

Tungsten alloy leaf is an important component on the multi-leaf collimator, and is also the main part of an IMRT device, which can achieve conformal irradiation, thereby minimizing the leakage of radiation dose. There are at least 20 pairs of tungsten alloy leaves on the multi-leaf collimator. Wherein, IMRT is also known as intensity modulated radiation therapy.

Tungsten alloy X ray shielding door is a new type of protective door, which is expected to be used to replace the original lead door, for applications in CT rooms, operating rooms, etc. Wherein, CT room has become one of the hotspots in recent months due to the novel coronavirus pneumonia epidemic as one of the screening items of COVID-2019 is CT chest. It has been reported that there are certain biological effects if X-rays are penetrating the human body. And if the amount of X-ray exposure exceeds the allowable exposure, radiation reaction may occur, and even a certain degree of radiation damage may occur.

Tungsten alloy shielding device plays an important role in shielding X-rays and γ-rays in a CT scanner. Some researchers have proposed such a new shielding device, which has a simple structure and excellent X-ray radiation shielding performance. The existing shielding devices are difficult to move. While this new device is easy to move during use.

The researchers used tungsten-containing waste to prepare ammonium paratungstate (APT) by leaching, extraction and ammonium sodium double salt method. Therefore, tungsten is effectively recovered. The quality of the prepared APT is higher. And it can further prepare tungsten oxide from APT. This method reduces the process cost by effectively recycling the salt-containing waste liquid generated in the process, which is worthy of vigorous promotion.

Tungsten hexachloride is an important tungsten source for producing tungsten carbide composite catalytic material with platinum-like catalytic properties. For example, some researchers used tungsten hexachloride as the source of tungsten, the stripped montmorillonite sheet as the carrier, and combined the chemical impregnation method with the in-situ reduction carbonization technology to prepare tungsten carbide composite catalytic material - a nanocomposite of tungsten carbide and montmorillonite.