The processing technology of coal-series kaolin adopts the process route of "grinding first and then firing", and satisfactory results have been achieved. Through high-density wet superfine grinding, comprehensive impurity removal, atmosphere strengthening, dynamic calcination and depolymerization, coal-series calcined kaolin with 90% content of -2μm and whiteness ≥90% was obtained, and the supporting special equipment was developed (this technology won the second prize of scientific and technological progress category of building materials science and technology award in 2004).
2. Fine processing equipment and process optimization of industrial mineral fillers.
After the basic research is completed, the structure and parameters of raymond mill and ball mill are improved by system optimization technology. With the help of mechanization and strong dispersion, the surface activation degree of industrial minerals is improved; Combining high temperature with chemical treatment to improve the purity of silicon micropowder; The fine processing equipment and process optimization technology of industrial mineral filler suitable for China's national conditions were developed. It has been produced and applied in Fuhai high-grade talc company in Haicheng, Liaoning Province (this technology won the second prize of building materials scientific and technological progress in 2004).
3. Preparation technology of high-performance mineral-based composite conductive powder
Based on the abundant and cheap barite, the mineral-based composite conductive powder material was developed by applying the semiconductor energy level theory and doping principle and adopting the chemical precipitation coating modification technology. The pilot production line of mineral-based composite conductive powder was built, which solved the preparation problem of light-colored conductive powder (this technology won the second prize of scientific and technological progress category of building materials science and technology award in 2005).
4. Application of new flotation collectors in timely tailings purification and complete technology.
Application of complete sets of technology in Fengyang Taibo Company's 5× 104t flotation purification production line for annual treatment of timely tailings. The chemical composition and particle size index of timely concentrate are obtained: SiO2 ≥ 99.5%; Al2O3，≤0.25%； Fe2O3, ≤0.025%, can be used as raw material for producing alkali-free glass fiber in Taiwan Province Glass Group (this technology won the second prize of building materials science and technology progress in 2005).
5. New modification technology of natural flake graphite
Technical inventions include: GICS technology for treating modified natural flake graphite; Surface modification technology of natural graphite micropowder: preparation and molding technology of high purity graphite micropowder. Among them, there are 14 domestic and foreign invention patents (8 have been authorized, including 2 American invention patents).
At present, China has been able to mass-produce reinforced expanded graphite and low-sulfur softened graphite, which have been applied in some important fields. For example, high-purity flake graphite and ultrafine powder with carbon content of 99.9%, impurity control and particle size of about 10 ~ 20μ m are used as conductive fillers for high-performance alkaline batteries; Bipolar plates, reinforced flexible graphite plates and natural graphite-resin composites for ion exchange membrane fuel cells have been successfully developed. The spheroidizing technology of flake graphite micro-powder composite coating is also mature, and it will probably be applied to the negative electrode material of lithium ion secondary battery (this project technology won the first prize of technical invention category in 2006 Building Materials Science and Technology Award).
6. Research and development of natural fiber brucite multifunctional composite powder material
Aiming at the unique fiber brucite mineral resources in western China and even the whole country, a new inorganic multifunctional composite material with flame retardant, reinforcing and antibacterial properties was developed.
The processing technology of magnesium-based flame retardant materials was studied, and a monoalkyl phosphonate coupling agent (PL modifier) was developed. The magnesium-based flame retardant materials were modified by PL modifier, silane coupling agent, titanate coupling agent and stearic acid, and the ultra-fine modification integration technology of magnesium-based flame retardant materials was studied.
Flame retardant reinforced powder and flame retardant reinforced antibacterial magnesium flame retardant have been applied in two enterprises, and their products are mainly used in plastics, paints, rubber, coatings and other industries (this technology won the third prize of scientific and technological progress category of building materials science and technology award in 2006).
7. New technology and industrial application of direct preparation of ultrafine mineral materials from five nonmetallic minerals.
Based on the activation of mineral particles by ultrafine grinding, the surface grafting mechanism of coupling agent and the synergistic effect of mineral combination, a new technology of synergistic toughening and strengthening of polymer by inorganic combination particles was developed, which significantly improved the comprehensive properties of polymer composites and achieved the purpose of replacing polymer raw materials with natural mineral materials. The integrated deep processing technology of ultra-fine and surface modification with independent intellectual property rights has been developed and industrialized, and remarkable social and economic benefits have been achieved (this technology won the second prize of scientific and technological progress category of building materials science and technology award in 2007).
8. Non-metallic mineral powder dry continuous surface modification technology
The dry industrialized continuous modification technology and equipment integrating modifier, modification process and modifier formula are developed. The structure of the equipment is a three-cylinder configuration with a rotor and a stator with a specific shape. The route of the powder is tortuous, which not only ensures the full dispersion and modification of the powder, but also flexibly adjusts the residence time of the powder in the cylinder. The powder is heated by self-friction and the temperature can be adjusted. The compound modification of more than two modifiers or more than two powders can be realized, and the negative pressure operation of modifiers can realize clean production. This technology and equipment have been widely used in production, with a market share of more than 80% (this technology won the second prize of Scientific and Technological Progress Award of Building Materials in 2007).
9. Investigation and evaluation of nonmetallic mineral resources in Hebei Province
Through the combination of resource evaluation, development and application, mining development and economic zoning, the achievements of exploration, development and application of non-metallic mineral resources in Hebei Province are comprehensively summarized and evaluated for the first time, and the database and spatial graphic library of non-metallic mineral resources in Hebei Province are established, and the information system of non-metallic mineral resources in Hebei Province is developed. 32 kinds of non-metallic minerals that can be explored in the province were newly discovered, and the metallogenic prospect area was divided into 13 kinds, demonstrating the development and application prospect of the dominant mineral 10. And published a monograph for the use of enterprises, institutions and government management departments in this province and the whole country (investigation and evaluation won the second prize of building materials scientific and technological progress in 2007).
10. Ultrafine technology of white minerals such as heavy calcium
China has successfully produced equipment for wet superfine white fillers and coated minerals, such as peeling machine, stirring mill and tower mill, which solved the problems of dispersion and cooling in the process. A large-scale heavy calcium production plant has been successfully built, and the scale has reached (5 ~ 10) × 104 t/a production line.
1 1. Preparation technology of nanometer light calcium carbonate
The technology and equipment for producing nano-calcium carbonate by "high gravity method" have been solved, and it has been successfully put into production in Enping, Guangdong, Meng Xi, Inner Mongolia and Chaodong, Anhui, with a scale of 3000 t/a.
12. Viscosity reduction technology of kaolin
Limited by resources, washed kaolin, China is unable to produce high-grade coated kaolin for paper making, with an annual import of about 20× 104t. The main reason is that there are defects in kaolin crystals in China, which leads to the viscosity concentration not reaching the advanced level abroad and can not meet the needs of high-speed paper machines. The viscosity concentration can be greatly increased by using extrusion technology and chemical viscosity reduction technology, and washed kaolin with viscosity of 68% was successfully produced by using this technology in Beihai, Guangxi.
13. Preparation technology of highly dispersed natural nano-bentonite
The application technology of nano-bentonite filled plastic was obtained by fully dispersing bentonite in organic base material with hyperdispersant. The process of purification, dispersion and modification of bentonite is solved. Zhejiang Hongfeng Clay Co., Ltd. has built an industrialized production line.
14. timely silica sand rod grinding-flotation process.
With the popularization of float glass technology, the requirement for silica sand particle size is reduced from -0.9 mm 0. 1% mm to -0.5 mm 0. 1 mm, and the requirement for ultrafine powder (-0. 1mm) is also reduced from 10% to 5%, and the requirement for Fe2O3 is reduced. Rod mill can avoid excessive grinding and remove impurities from silica sand by flotation, which is widely used.
15. bentonite is used in the technology of "sand-fixing vegetation"
Using the characteristics of bentonite, a "sand-fixing vegetation" material is prepared, which absorbs a lot of water and slowly releases it. Planting vegetation and improving land on the basis of sand fixation have been included in the "863" project and passed the acceptance.
16. preparation technology of nonmetallic mineral materials for drug sustained release
There are many nonmetallic minerals available, such as attapulgite clay, bentonite (including montmorillonite), calcium carbonate, fluorite, gypsum, kaolin, magnesite, silica sand, talc and so on. Among them, inorganic gel, drug carrier and sustained-release material prepared from montmorillonite have been successfully developed, and the relevant indexes meet the requirements of pharmacopoeia of developed countries. Bentonite has also been successfully developed as a drug carrier and sustained release agent for inorganic gels.
17. preparation technology of raw materials for graphite sealing materials for nuclear industry
Successfully solved the production technology of low sulfur, low chlorine and high purity expanded graphite. The graphite pap production line can be used for secondary desulfurization. In particular, the process of producing expandable graphite by electrochemical method is put forward.
18. preparation of molecular sieve from natural aluminosilicate nonmetallic minerals
Large molecular sieve plants in China have successfully developed the process of preparing molecular sieves from natural minerals such as kaolin, attapulgite clay and bentonite.
19. application of fiber minerals in paper industry technology
Yunnan wollastonite was successfully used as paper filler, which improved the function of paper, saved the cost and solved the surface composite modification technology of wollastonite dispersion.
20. Preparation technology of gypsum whisker
A gypsum whisker factory was built in Jiaozuo, Henan Province, which solved the technology of producing whiskers by liquid phase method. Gypsum whisker can be used as high-grade filler of composite materials.
2 1. Application of nonmetallic materials in flue gas desulfurization.
Non-metallic minerals containing calcium and magnesium, such as limestone and dolomite, can be used as desulfurizers after superfine, which mainly solve the problems of particle size and particle size distribution and emulsification technology.
22. The technology of preparing waterproof blanket from natural sodium bentonite.
Natural sodium bentonite GCL is a new waterproof material in China. Its raw material processing, waterproof blanket needle forming and film covering technology have been successful, and the production line construction has been localized.
23. Gypsum block manufacturing technology
The technology of producing gypsum block, gypsum board and plastering gypsum by calcining hemihydrate gypsum from natural gypsum was developed, including the formula and parameters of each process.