The resources of barium sulfate in China are abundant, the total reserves of resources are more than 1 billion tons, and the grade of barium sulfate ore is relatively high. The reserves and output of barium sulfate are the first in the world at present, which is a favorable condition for the development of barium sulfate products.

Types of industrial barium sulfate

China's industrial barium sulfate mainly has the following types:

1. Heavy barium, also known as natural barium powder. It is made by the process of cleaning, grinding and drying after selecting natural barium sulfate. The impurities are more, the quality is mainly determined by the mine itself, but its price is low, usually applied in white pigment production or low-grade. Used as a filler in the coatings, plastics, and ink industries.

2. Precipitated barium sulfate, also known as industrial barium sulfate or sedimentation. It is made by artificial processing, and unlike the heavy sputum, the sputum is almost free of impurities. It is slightly soluble in water and insoluble in acid. It is not toxic by itself, but it can cause poisoning if it contains soluble hydra-zine. The precipitated barium sulfate in the industry is mainly formed by reacting barium sulfate with sulfuric acid, reacting barium chloride with sulfuric acid or sodium sulfate, and reacting barium sulfide with sodium sulfate. Precipitated barium sulfate is used as a filler in pharmaceuticals, high-grade coating inks, plastics, rubber, glass, ceramics, etc. because of its specific index. It is usually divided into coating grade precipitated sulfuric acid according to different applications. Barium, plastic grade precipitated barium sulfate, etc., which is relatively expensive compared to heavy barium.

The benefits of precipitating barium sulfate

Precipitated barium sulfate mainly has the following products: Refined precipitated barium sulphate, Superfine precipitated barium sulphate and Modified precipitated barium sulphate.Precipitated barium sulfate has the appearance of white amorphous powder, the relative density is 4.50 (15 ℃), the melting point is 1 580 ℃. Because of its high refractive index (1.63 / 1.65), the color is white and has a certain covering power. And can be used in paint, ink, plastic, rubber and battery raw materials or fillers; imprint paper and copper board paper surface coating agent; sizing agent for textile industry; Glass products as a clarifying agent, can play a role in defaming and increasing luster. Can also be used for radiation protection wall materials, but also for porcelain, enamel and dyestuff industries, but also for the manufacture of other barium salt raw materials.

How to identify precipitated barium sulfate

How do you distinguish the quality of precipitated barium sulphate? The main thing is to look at the following indicators.

1. Whiteness, a very intuitive indicator, if you can take samples, you can compare them with each other. Through visual comparison, it can be seen that the whiteness of different brands is different. For the precipitation of barium sulfate, the whiteness is more The quality is often better.

2. Particle size distribution and particle shape, this indicator directly affects downstream manufactured products. For example, in plastics or coatings, if the particle size distribution is uneven, it will cause uneven filling due to excessive particle size difference, which will affect the overall performance of the product. . Of course, the shape of the particles will also have an effect. Generally speaking, the particle size distribution is uniform, and the influence of the particle shape depends on the specific product.

3. Dispersal and oil absorption. Low oil absorption can save production costs, and the difficulty of dispersion also affects the quality of the product.

4. Impurity content, which contains many impurities in natural barium sulfate. Precipitated barium sulfate greatly reduces the content of impurities by artificial synthesis, but there are more or less mechanical impurities in the production process, the more impurities Less is less likely to form mechanical black spots, and the quality is better.

5. Fineness, although this index is not an indicator directly affecting the quality of barium sulfate, it is a decisive factor for the value of barium sulfate. Generally speaking, the finer the precipitated barium sulfate, the more difficult it is to process, and the higher its value. When it comes to nanosecond, its market prices vary greatly. Nona-scale precipitated barium sulfate is generally used in some high-end plastic ink coatings and other industries.

These are the indicators for the determination of precipitated barium sulfate. Now do you know how to identify high-quality precipitated barium sulfate? Welcome to Shaanxi Fuhua Chemical Co., Ltd to buy the precipitated barium sulfate suitable for you.