Yang Jie looked at Ma Huazhong and said: "Because there are still a lot of radioactive thorium nuclides and radon nuclides in this tailings dam, and the leaking sewage is radioactive, I hope you will take a safer and more secure plan when dealing with it." ”

Ma Huazhong said: "We have carried out joint research with the Chinese Academy of Sciences and Gaila Energy Technology Company, and in the laboratory, it has a very good effect on the extraction of radioactive thorium nuclides and radon nuclides, and the extractants are also very environmentally friendly, and the experimental results show that the radioactive sewage after treatment has reached a very low level." ”

"In addition, we carry out special treatment of the buildings and equipment of the sewage treatment plant to ensure that the workers are not harmed by radon. ”

Yang Jie nodded.

Because thorium resources are radioactive, this tailings dam will continue to produce this kind of radon gas with a short half-life, although this kind of thing has a short half-life, but this guy will enter the air and water, and this element will cause harm to the human body after inhalation.

In other words, as long as the thorium resources in the tailings dam are not separated, the thorium resources in it will continue to produce radioactive radon gas, and then pollute the surrounding environment with this wastewater.

The expert group has also sampled and analyzed the tailings dam, which contains at least 70,000 tons of thorium resources, 18 million tons of iron, 8 million tons of rare earths, 140,000 tons of niobium, fluorite can reach 24 million tons, 40,000 tons of scandium, if all the fluorite is extracted, it has exceeded the value of the iron extracted by Baotou Steel Group for so many years, and it is indeed a huge treasure.

If all the value of this tailings dam is squeezed dry, there will still be almost 70% of the slag that has no use value, that is, before the tailings dam is mined and utilized, a tailings dam with a large area must be built, and it cannot cause a second pollution to the environment.

When the panel's plan included a design for a large tailings dam, Yang Jie did not agree.

"These tailings dams can also be utilized, with these tailings slag that has no use value can be prepared with tailings slag autoclaved brick equipment suitable for the fixed production of various different specifications of standard bricks, hollow blocks, perforated bricks, etc., all kinds of brick type, and block molding is mainly based on hydraulics, machinery to play an auxiliary role, vibration and pressurization is completed, such bricks have high compactness, frost resistance, sound insulation, heat insulation, excellent thermal insulation performance, accurate dimensions, high grade, this brick is also famous' Dutch bricks can be used for flood control, and can also be widely used in urban road renovation, which can maximize the value of tailings slag. ”

Yang Jie opened his mouth and said.

“......”

Hearing that Yang Jie wanted to squeeze out the last residual value of these tailings slag, everyone here couldn't think of a better plan than this.

"My requirement is to extract the valuable elements in the tailings dam to the greatest extent, so it doesn't matter if it is slower in the mining and enrichment process, this kind of iron, rare earth, niobium, fluorite, scandium and other polymetallic symbiotic super-large tailings dam is still very difficult to comprehensively utilize, and foreign countries do not have the same experience in the comprehensive utilization of tailings resources, so we can only rely on ourselves. ”

Yang Jie opened his mouth and said: "No matter how difficult it is, we have to gnaw down this hard bone." ”

He looked at Xue Baohui of Longyuan Rare Earth Technology Company and said: "Mr. Xue, Longyuan Rare Earth Technology Company has cooperated with Northern Rare Earth Technology Company for so many years, and has accumulated a lot of experience in comprehensive utilization, do you have confidence?"

"In fact, we have verified a new process we have developed ourselves in the laboratory, first to optimize rare earths, then mixed flotation, sedimentation, primary desulfurization, phosphorus removal, then through strong magnetic selection, and then through positive flotation iron, but also through another re-selection, and then through secondary desulfurization, phosphorus removal, and then again, in this process the enrichment of niobium and scandium can also reach a high grade. ”

Xue Baohui said: "The experimental results show that through this method we can obtain a grade of 5% niobium concentrate, and we are also finding an improvement method for this process, if successful, the niobium concentrate grade can be increased to about 20% niobium concentrate, and at the same time, the grade of scandium concentrate can also be greatly improved." ”

"In addition, our fluorite process is also a chemical modification of the fatty acid collector in the mixed foam beneficiation process, which solves the problem that it is difficult to remove this agent before, and it is difficult to get high-grade rare earth concentrate for this reason, we have developed a new type of agent through years of research and development, which not only improves the grade of rare earth concentrate, but also improves the grade of fluorite concentrate, which can now reach 95%, and now our company is in rare earth, fluorite, iron concentrate, niobium concentrate, The grade of scandium concentrate has reached the highest level at home and abroad, and this process can be commercialized. ”

Xue Baohui said proudly.

Longyuan Rare Earth Technology has invested a lot in technology research and development in recent years, and behind it Huaxing Group is providing various required equipment, and the speed of successful research and development into commercial products is very fast, and it has now become the technology company with the strongest technical strength in rare earth deep processing.

Now this subsidiary has achieved a first-class level in the deep processing of rare earths, and while cooperating with the Northern Rare Earth Company, it is naturally also interested in the more valuable strategic resources niobium resources and scandium resources, and began to carry out technical layout in this area as early as five years ago.

In fact, two years ago, Longyuan Rare Earth Technology established a pilot production line for scandium oxide and niobium oxide, although the output of these two experimental production lines is only one ton, but it has produced high-purity scandium oxide and niobium oxide, filling the domestic gap of these two products.

Now the number of all manufacturers of tantalum and niobium concentrate produced in China every year adds up to less than 200 tons, which is far from meeting the demand, and can only rely on imports.

Because Huaxing Group has a very large demand for niobium oxide, it is mainly used in its own aerospace industry, superconducting materials and other products and equipment.

This metal has similar characteristics to silicon carbide whisker materials, with the advantages of enhanced toughening and improved corrosion resistance, but the compounds and alloys of this material have a high superconducting transition temperature, and Huaxing Group is the most used in this regard, mainly used in major scientific devices such as superconducting generators, accelerator high-power magnets, and superconducting magnetic energy storage.

This is also one of the materials that Huaxing Group's material R&D experts focus on R&D.