%{tishi_zhanwei}%

Yuan Lei small classroom, wollastonite has become the two advantages of strategic emerging minerals.

Release time:

2024-01-29 09:37

 

Yuan Lei small classroom, wollastonite has become the two advantages of strategic emerging minerals.

 

Strategic emerging industries are based on major technological breakthroughs and major development needs, and have a major leading role in the overall economic and social and long-term development. They are knowledge-intensive, low consumption of material resources, large growth potential, and good comprehensive benefits. Strategic emerging industries include new generation information technology industry, high-end equipment manufacturing industry, new material industry, biological industry, new energy automobile industry, new energy industry, energy conservation and environmental protection industry, digital creative industry and related service industry. With the vigorous and comprehensive development of the country, the important role of non-metallic minerals is increasingly revealed, and non-metallic minerals play an important role in national economic construction and strategic industries.

 

According to my country's non-metallic mineral resource endowment, supply and demand situation, external dependence, import concentration and other factors, it is preliminarily determined that graphite, high-purity quartz raw materials (vein quartz), pyrophyllite, fluorite, boron ore, barite, diatomite, talc, Potash, phosphate, diamond, kaolin, bentonite, magnesite, wollastonite, gypsum, trona, asbestos, feldspar, and mica have important applications in national economic and mica in national economic construction and strategic emerging industries. Among them. Magnesite, graphite and wollastonite have a considerable advantage in other non-metallic minerals.

 

 

Today, let's talk about why wollastonite can become a dominant mineral in non-metallic minerals in strategic emerging industries. What are the specific advantages?

 

 

01

resource advantage

 

China is rich in wollastonite resources, with proven resource reserves of about 0.2 billion tons, remaining resource reserves of 0.13 billion tons, and prospective resources of more than 0.32 billion tons, ranking first in the world. It has huge resource advantages, mainly distributed in Jilin Dading Mountain, Siping, Panshi, Jiangxi Shanggao, Yueguang Mountain, Liaoning Faku, Heilongjiang Mishan, Longjiang, Hebei Wu 'an, Qianxi, Jiangsu Jiangning, Liyang, Zhejiang Changxing, Fujian Zhangzhou, Fujian, Nanping, tongling in Anhui, Changning in Hunan, Tengchong in Yunnan, Dulan in Qinghai, Balinzuo Banner in Inner Mongolia, Hami in Xinjiang and other regions.

 

China's wollastonite mineral road began in the 1970 s. In 1975, China first discovered wollastonite ore in Xiaojipu, Daye, Hubei, and was the first to develop and apply it. The wollastonite deposit was discovered in Dadingshan, Lishu County, Jilin Province in 1980 and entered the international market for the first time at the Guangzhou Spring Fair in 1982. In 1983, an extra-large iron-mercury mountain wollastonite deposit was discovered in the Dadingshan mining area. Subsequently, a large number of large and medium-sized wollastonite deposits were found in Jilin, Hunan, Jiangxi, Fujian, Qinghai, Hebei, Zhejiang, Liaoning and other provinces. Wollastonite deposits in China include Hubei wollastonite, Jilin wollastonite, Heilongjiang wollastonite, Zhejiang Changxing wollastonite, Jiangxi wollastonite, Fujian Nanping wollastonite and Yunnan Tengchong wollastonite.

 

Chemical Composition of Ores from Main Wollastonite Mines in China (%)

 

 

China has built plants in the above areas and put into operation, of which the more representative is Jilin Lishu Wollastonite Mining Company. At present, the annual output of wollastonite in China has reached 300000 t, accounting for about 54.7 per cent of the world's total output, surpassing the United States and India to become the largest country in wollastonite resources and production. About 50% of the wollastonite produced in China is used in China, mainly for ceramics, refractory coatings, plastics and rubber. China's wollastonite is mainly exported to Europe and Japan, accounting for more than 50% of the world's wollastonite trade.

 

At the end of 2018, the Jiangxi Provincial Department of Natural Resources announced that the Jiangxi Provincial Geological Exploration Fund project "Shizhushan, Yushui District, Xinyu City, Jiangxi Province-Zhangmuqiao Wollastonite Ore Survey in Shanggao County" has found 69.55 million tons of minerals, equivalent to 69 large-scale wollastonite mines. The scale of the mine has exceeded the largest known wollastonite mine in the world, and the ore quality is good, the aspect ratio is large, and the content of wollastonite in the ore is more than 63% on average.

 

02

Market Advantage

 

Wollastonite has been widely used in various industrial sectors because of its unique crystal structure and many excellent physical and chemical properties.

 


Ceramic industry

Ceramic industry is the main application field of wollastonite products, accounting for about 50% of the total consumption. It is mainly used in the production of glazed tiles, fine art porcelain, sanitary porcelain, daily porcelain, power porcelain, high frequency and low energy consumption wireless electric porcelain and chemical ceramics. This is mainly due to the high whiteness of wollastonite. Even the purity and whiteness of natural wollastonite lump ore are more than 90% instead of SiO in ceramic glaze.2And CaO mixture, can burn out smooth uniform, bright white smooth glaze.

The plastic industry

Wollastonite has high resistance, low dielectric constant and low oil absorption, which makes it show obvious advantages over other non-metallic mineral materials. Nylon is one of the largest markets for wollastonite applications. Wollastonite reinforced nylon 6 or nylon 66 modified with silane coupling agent can improve bending strength, tensile strength, reduce moisture absorption rate and improve dimensional stability.

The rubber industry

The application research of wollastonite in rubber industry was carried out earlier in China, and RB wollastonite powder was used instead of lithopone, part of titanium dioxide, white carbon black, light calcium, clay and so on as filler of various types of rubber, and many performance indexes of products were improved.

A large number of application results show that wollastonite used in light-colored rubber can replace titanium dioxide, clay and lide powder in a large amount, play a certain reinforcing role, and can improve the covering ability of white colorant, play a whitening effect.


The metallurgical industry

Wollastonite is a natural low-temperature melting material with inherent fluxing properties, stable composition, high purity, alkalinity (CaO/SiO2) tends to be neutral and other excellent characteristics, which provides an ideal raw material for the protection of continuous casting materials for metallurgical steelmaking, especially Al in wollastonite.2O3The content of the metallurgical slag is very small, so that the metallurgical slag is made to adsorb the harmful impurity Al in the molten steel.2O3Ability is extremely strong.

The paper industry

Wollastonite has the characteristics of high refractive index and high whiteness, which can increase the opacity and whiteness of paper. Wollastonite is used in papermaking, and the formed wollastonite-plant fiber network has more microporous structure, which improves the ink absorption performance of the paper. At the same time, due to the improvement of smoothness and the reduction of transparency, the printability of the paper is increased.

Wollastonite products are mainly high aspect ratio wollastonite and ground wollastonite. The former is a high-grade product, mainly using its physical and mechanical properties, and is widely used in plastics, rubber, asbestos substitutes, paints, coatings and other industries. The compatibility of the surface-modified high aspect ratio wollastonite powder with organic materials is greatly enhanced. Adding to rubber, plastics and other polymers can significantly improve the performance of products, increase the hardness, bending strength and impact resistance of products, improve the electrical properties of materials, and improve the thermal stability and dimensional stability, the surface of the product is smooth, the soil force is enhanced, and more fillers are allowed to be filled, the amount of pigment is reduced, and the wear resistance is enhanced, so that the cost of the product can be reduced, and the special function of plastic, rubber and other polymers are not given by themselves. It is the most promising application field of wollastonite.

Compared with high aspect ratio wollastonite products, the market prospect of ground wollastonite is somewhat different, it is a low-grade product, mainly used in ceramics and metallurgical industry, SiO in wollastonite.2The CaO component provides a low expansion rate and good thermal shock resistance. China's wollastonite processing adopts the policy of preferential exploration and preferential support. Starting from Lishu, Jilin, it has successively formed eight production bases, including Panshi in Jilin, Tie (France) (Library) in Liaoning, Daye in Hubei, Changxing in Jiangsu (Jiangsu) and Zhejiang (Jiang), Xinyu and Shanggao in Jiangxi, and Dongfeng Lianzhou in Lake (South) and Guangzhou (East). Tengchong in Yunnan are also being mined in batches in Fujian, Guangxi, Qinghai and other places.

 

Main Wollastonite Production Enterprises and Production Capacity in China

 

 

The wollastonite series products produced by Shenyang Jingang Wollastonite Mining Co., Ltd. are natural non-metallic minerals with fibrous, needle-like structure, large aspect ratio, bright and white color, natural low iron, micro-sulfur and phosphorus, no crystal water, high melting point, corrosion resistance, aging resistance, low thermal expansion coefficient, high refractive index, good reinforcement, sealing, heat resistance, wear resistance and stability.

 


Summary


China is rich in wollastonite resources, and in 2018, a super-large-scale wollastonite bed was discovered in Xinyu, Jiangxi Province, which provides a guarantee for the output of wollastonite products in China. With the continuous development of science and technology, the continuous improvement of wollastonite technology and equipment are constantly updated, which play a key role in the development of China's wollastonite industry. But at the same time, we should also reflect on the problems in the development of wollastonite industry and think about how to give full play to its advantages.

 

 

 

 

 

 

 

 

 


Strategic, wollastonite, china, industry, main, rubber, for, advantage, with, jilin

Yuan Lei's Little Knowledge | Performance Requirements and Types of Fillers for Coatings

2024-06-12


Fillers in coatings are usually white or slightly colored pigments with a refractive index less than 1.7. It has the basic physical and chemical properties of pigments used in coatings, but due to its refractive index being similar to the film-forming material, it is transparent in coatings and does not have the coloring and covering power of coloring pigments. It is an indispensable pigment in coatings.

Yuan Lei's Little Knowledge | Application Effects of Different Mineral Powder Materials in Coatings

2024-06-04


In architectural coatings, commonly used mineral materials include barium sulfate, calcium carbonate, kaolin, mica powder, talc powder, quartz powder, silica micro powder, transparent powder, glass powder, wollastonite powder, etc. Reasonable application of various mineral materials can effectively improve or enhance the performance of coatings. Let's take a look at the application of different mineral materials in coatings.

Yuan Lei's Little Knowledge | Characteristics of Mineral Materials

2024-05-21


Mineral materials refer to the material products obtained by processing and transforming natural minerals (mainly non-metallic minerals) or rocks as the main raw materials, or minerals or rocks that can be directly used as materials and aim to utilize their main physical and chemical properties. This meaning mainly includes the following four aspects: first, natural minerals and rocks that can be directly utilized or processed to be utilized; Secondly, finished or semi-finished materials made mainly from natural non-metallic minerals and rocks through physical and chemical reactions; Thirdly, artificially synthesized minerals or rocks; Fourthly, the direct utilization targets of these materials are mainly their own physical or chemical properties, not limited to individual chemical elements.