Barium Sulfate Supplier : The Application of Barium Sulfate in Paint- Sinoke Material

There are many Barium Sulfate Supplier in worldwide to offer kinds of barium sulfate, however only few suppliers can offer the best quality super white grade barite for paint. The reason is that because of their mines do not have condition to offer the rich barite mines. The main component of barite is barium sulfate(BaSO4), which is a common mineral in industrial production. The common barite is usually in the form of crystals, such as tubular, so the barite can be gathered to present roses. The form of flowers. Barite has a variety of colors, such as light white, light yellow, etc. Its usage is also very extensive.In this article we will discuss about the application of barium sulfate in paint industry.

In the paint industry, white barite powder fillers can increase film thickness, strength and durability. Zinc antimony pigments are also used in the manufacture of white paints, which have more advantages than lead white and magnesium white. Barite used in the paint industry requires sufficient fineness and high whiteness. Usually barium sulfate supplier offer the fineness white barite powder(barium sulfate power)form 300 mesh to1250 mesh with the lowest whiteness 95%. The paper industry, rubber and plastics industries also use white barite powder as a filler, which improves the hardness, wear resistance and aging resistance of rubber and plastics. White barite powder fillers for paint, rubber and paper making generally require BaSO4 content to be greater than 98% and CaO to be less than 0.36%. Magnesium oxide, lead and other components are not allowed.

1. White barium sulfate powder for Paint and thick coating

Barite powder has high filling properties and can be applied to all coating series, such as primer, thick coating and other types. Its low specific surface area and particle size fraction and flowability make the barite powder in the process. With low wear, barium sulphate is recommended for automatic primer surface layers and maintains good uniformity and smoothness even at high fill levels.

2.White barium sulfate power for top-coat/finishing coat

White Barite powder is superior to most other fillers, especially in chemical resistant coatings. It is inert, insoluble in water, acid, alkali and organic intermediary. Excellent gloss and fineness of the particles allow the topcoat to be protected from prolonged exposure. Barium sulfate is recommended for topcoats which increase surface hardness, color and stability.

3.White barium sulfate power for Latex paint/ emulsion paint

Due to the high specific gravity, barite powder can only be used in latex paints, mainly for high gloss and silk paint, and is known as “acid resistant” latex paint. It has acid resistance even when exposed. The easy dispersibility of barite powder, optical rotation and easy retention can increase its chemical properties. Barium sulfate can be used in high gloss paints and latex paints.

4.White barium sulfate powder for printing ink
The printing ink usually request for the finest white barium sulfate powder. Many Chinese barite supplier can not offer this grade because of their mill machine can not make such super fine which reach to D50 0.5-1.0 um. With the low abrasion, high gloss and color stability, low cohesiveness and flow ability, the barite powder is suitable for high quality printing inks, barium sulfate recommended for high optical efficiency inks.

5.White barium sulfate powder for power coating
Used in powder coatings, barite powder improves gloss, flow, filling and compatibility with pigments

As a professional white barite powder supplier, Sinoke is used in advanced production lines and strict testing measures. Because the main source of mine comes from China’s largest and best barite mine area – Guizhou. Our raw materials are extracted and have a high basic quality. Sinoke sincerely hope to have the opportunity to become your raw material supplier.

The Usage of Precipitated barium sulfate -precipitated barium sulfate  supplier

As a  precipitated barium sulfate  supplier  in China , precipitated barium sulfate appearance was a white amorphous powder having a relative density of 4.50 (15 ° C) and a melting point of 1 580 ° C. Due to its high refractive index (1.63~1.65), it exhibits a whiter color and a certain hiding power. At present, 95% of domestic manufacturers use the Glauber’s salt method to produce precipitated barium sulfate.

Precipitated barium sulfate can be used as a supplementary filler and is widely used in various coatings, plastics, rubber, paints, inks, insulating tapes, ceramics, storage batteries, enamel and other industries. Can be used in acid resistant rubber products and general products. It can also be used as a surface coating agent, a sizing agent, a weighting agent, and so on.

The Usage of Precipitated barium sulfate/ The application of Precipitated barium sulfate

1.Plastic industry

Precipitated barium sulfate is used as a gasket for titanium dioxide and pigments in plastics to reduce the amount of pigment added and to save about 10% of the cost. The application of precipitated barium sulfate (about 25%) to PP can make the PP surface resemble ABS without affecting the existing properties of PP, providing a high gloss and high hardness surface. Precipitated barium sulfate can reach 80% of its weight filling rate. It can be used to effectively isolate noise and noise when used in drain pipes, speakers and sounds. Precipitated barium sulfate N can be added to curtains to increase weight. It is used in household appliances to provide high gloss, good color, scratch resistance and dimensional stability.

2.Topcoat industry

Precipitated barium sulfate is superior to most other fillers, especially in chemical resistant coatings. It is inert, insoluble in water, acid, alkali and organic. Excellent gloss and fineness of the particles make the topcoat exposed for a long time. It can be protected. Precipitated barium sulfate is recommended for topcoats, which increase surface hardness and color stability.

3.Printing ink

Low abrasion, high gloss and color stability, low cohesiveness, combined with its flowability make barium sulfate suitable for high quality printing inks. Precipitated barium sulfate is recommended for high optical performance oils.

4.Latex paint industry

For reasons of weight, precipitated barium sulfate can only be used in latex paints, mainly for high gloss and silk paints, and is known as “acid resistant” latex paint. It has acid resistance even when exposed. Easy dispersibility of precipitated barium sulfate , optical rotation and easy to retain properties can increase its chemical properties. Precipitated barium sulfate can be used in high gloss paints and latex paints.

5.Primer and thick coating

Precipitated barium sulfate has high filling properties and can be applied to all types of coatings, such as primers, high-build coatings, etc. Its low specific surface area and particle size fractionation and flowability make precipitated barium sulfate in the process. With low wear, precipitated barium sulphate is recommended for automatic primer surface layers and maintains good uniformity and smoothness even during high filling.

6.Precipitated barium sulfate for powder coating

Powder coatings are one of the fastest growing markets in the coatings industry. Due to the special properties of precipitated barium sulfate, low binder demand and excellent dispersibility, it is an indispensable component of powder coatings. Precipitated barium sulphate has a higher specific gravity than titanium dioxide, giving us the opportunity to formulate non-flying lacquer powder coating formulations, even when using fine powders. The mechanical properties of precipitated barium sulphate-filled powder coatings in a typical powder coating formulation are related to particle size (the finer the finer the better).

7.Precipitated barium sulfate for waterborne coatings

Due to the chemical inertness and insolubility of precipitated barium sulfate, it is used in waterborne coatings as well as in conventional coatings. The role of micronized precipitation of barium sulfate has been confirmed, even in electrophoretic coatings (the requirements for particle deposition or wettability of electrophoretic coatings are very complex). Usually the amount of substitution for titanium dioxide is in the range of 10-30%.

Barium Sulfate Supplier in china:what is barium sulfate

As a professional Barium sulfate supplier in china- Sinoke material showing the following date to let you know clear about barite:


1.Type and characteristics of barite ore


Ore typeOre characteristicsMajor minerals and associated minerals
Sedimentary typeBlocky striped bean grainBarite, Quartz, Clay, Pyrite
Hydrothermal typeGrey or WhiteBarite, Pyrite, Chalcopyrite,fluorite
Volcanic sedimentary typeBarite, Siderite
Residual slope typeEasy to use, high qualityBarite



  1. The main properties of barite minerals
Ore NameChemical formulaChemical componentsDensity


Moh’s hardnessCrystalShapeColor
BariteBaSO4BaO,65.7 SO3,34.34.2-4.525-3.5ItalicPlate or columnGrey or White


  1. Main use of barite
Application fieldMain usageMark
Oil drillingDrilling mud weighting agentCool the drill bit, lubricate the drill pipe, increase pressure and prevent blowout
Chemical UsageManufacture of cerium oxide, cerium carbonate, cerium chloride, cerium nitrate, precipitated barium sulfate, barium hydroxide
GlassDeoxidation, fluxingIncrease the optical stability, gloss and strength of the glass
Rubber, Plastic, PaintFiller, brightener
Building materialAnti-radiation cement







  1. Quality requirements for barite powder for oil drilling


ITMETech data
Density  g/cm3≥4.2
Size  -200mesh




Water soluble,%≤0.1
BaSO4, %≥90


  1. Grade classification of chemical barite
GradeItem %
BaSO4SiO2Fe2O3Al2O3Water soluble


  1. Quality requirements for barite powder for paints, etc



Paint90-95%0.05>325Super white
Rubber>98<0.36few>325Can not have Mn, Cu, Pb


Distribution characteristics of barite resources in China

China’s barite resource ranks first in the world and is concentrated in distribution. The 82th of the identified reserves are distributed in five provinces: Guizhou (34%), Hunan (21 ~ 22%), Guangxi (14%), Gansu (7%), and Shaanxi (6%).

Barite deposits in China are relatively simple and can be divided into three types: sedimentary type hydrothermal type and residual slope type.

  • Sedimentary type is the most important deposit type, and the accumulative resource reserves account for 67. 7%. It is mainly concentrated in Cambrian, followed by Devonian, with the advantages of large scale and easy mining.
  • The accumulative resource reserves of hydrothermal barite deposits account for 31. 3%. 0, mainly small and medium ore deposits, mainly in Ordovician, Devonian and Triassic, often associated with other minerals.
  • The accumulative identified resource reserves of residual slope type barite deposit are only 1.4, and the scale is small, only in Quaternary.

Why to add precipitated barium sulfate in plastic modification?

General plastics generally refer to large production, wide use, good molding, cheap plastics, such as polyethylene, polypropylene, phenolic and so on. Many of the products people use in their daily lives are made of these common plastics.

General plastics have the advantages of good formability and low price, but their disadvantages such as easy aging and easy deformation bring many inconvenience to use. In order to overcome these shortcomings, it can be improved by modifying and adding precipitated barium sulfate to meet the needs of practical application.

Because of its unique and excellent properties, barium sulfate precipitated has been widely used as one of the new functional modified materials for plastic products. Precipitated barium sulfate has the characteristics of improving chemical corrosion resistance, heat resistance and appearance of plastic products.

In addition to these characteristics, precipitation of barium sulfate in the plastic modification process played a specific role in what?

1.Improve the rigidity of plastics. Usually the rigidity of plastics is poor. For example the flexural modulus of pure PP is about 1000MPa which is far from satisfying the application requirement of some parts. When 30% talc powder is added its flexural modulus can reach 2000MPa. It can be seen that talc powder has a remarkable toughening effect.

2.Improve the hardness of plastic appearance. Plastic hardness is usually low, the appearance easily scratched, affect the appearance, and then affect its appearance and decorative. The hardness of inorganic filler is higher than that of plastic.

3.Improve the dimensional stability of plastic products and components. Some plastic crystals shorten greatly, which results in large shortening rate of plastic products, which is easy to deform and unstable in scale after coming out of mould, and the shortening rate of plastics can be greatly reduced by adding fillers, and then the dimensional stability of plastic products and components can be improved.

4.To improve the formability of plastics. Some fillers can improve the processability of plastics, such as barium sulfate, glass beads, etc.

5.The strength of progress. The tensile strength of the general plastics is not high. When the inorganic filler is added, the tensile strength and flexural strength of the plastics can be improved within the range of the proper filling amount, and then the engineering applicability of the plastics can be improved.

6.Some functions are given to the plastics to improve the added value of plastic. Some fillers can give some functions to plastics, such as PP adding talcum powder and calcium carbonate to improve the antistatic and printing functions of PP; when the hollow glass bead is added to the plastic guessing, it can improve the thermal insulation function of the plastic; the metal particles can improve after the plastic guessing. The thermal conductivity and conductive function of plastic.

Three methods for removing impurity and whitening barite

When barite is used in different fillers, its product requirements are different. For example, when used on coatings, the whiteness of barite is not less than 90, and the rubber filler is not allowed to contain impurity such as MnCU, Pb and so on. To this end, today sinoke for everyone to introduce the barite impurity whitening technology in detail.

1.The method of whitening by flotation.

For sedimentary barite ore and hydrothermal barite ore associated with fluorite sulphide ore, the size of inlay is very small, and the physical impurity removal effect is not good. There are two kinds of flotation reagents: one is anionic collector with alkyl sulfonate fatty acid sulfate, the other is cationic collector with high amine salt in barite flotation. Because of the diversity of associated minerals, the use of a single flotation reagents is often unable to achieve the desired goal. Therefore, combination reagents are often used to promote each other and achieve better flotation results. Fluorite, calcite and barite belong to calcium ionomer compounds. The energy is between 417~519kJ/mol and the floatability is similar, which determines that the complex barite ore is difficult to separate.

The mixed collector sodium dodecyl sulfate oleate sodium oleate 96g / t 24g / t sodium silicate, a mixed inhibitor, can also be used to flotation the tailings of Pingshui Copper Mine for barite recovery. A better index was obtained than the single collector inhibitor: the concentrate grade of 95.2 and the recovery rate of 83.1 and 2.67 were increased by 3.52 and 83.1 respectively.

In addition, barite can be fine ground and dissociated from quartz monomer. Oleic acid plus oxidized paraffin soap or sodium dodecyl sulfonate plus oxidized paraffin soap can be used as collector, and sodium carbonate as adjuster and gangue inhibitor. The flotation effect is good. The BaSO4 of concentrate grade is greater than 98 and Sio 2 is less than 1, which reaches the expected target.

2.Method of calcining and whitening

During the formation of barite, some colored organic compounds will inevitably be mixed, which will make barite grey and green and black, thus reducing the whiteness of barite and affecting the application of barite in white coatings. Due to the explosion of endothermic materials at high temperature, hydrothermal barites volatilize the chromogenic organic matter distributed in the crystal or gap of barite. The whiteness of barite powder calcined at 850 ℃ for 2 h can be increased from 88.19% to 90.64%, and 93.5% after calcined at 950 ℃ for 2 h.

3.The method of removing impurities and whitening by leaching

Pure barite shows white luster, due to the characteristics and quantity of the mixture, will appear light gray, light blue, yellow, pink, brown, light brown and so on.

The surface chemical properties of barite and associated minerals are different from those of barite, and the carbon, iron, manganese, magnesium, nickel and other impurities in the ore are removed by acid (or alkali) leaching and redox. Acid (alkali) leaching is the reaction of hydrochloric acid sulfate and other metal compounds (or Sio _ 2) associated with barite to form compounds soluble in water or dilute acid (silicate) which are then washed and filtered and separated from soluble matter. The oxidants such as hydrogen peroxide, sodium hypochlorite or concentrated sulfuric acid are used to dissolve the associated metal compounds in the mineral and oxidize the chromophore organic compounds in the barite. Then the Fe3 is added to the reduction agent. Reduction to Fe2, leaching iron in a short time, to achieve the purpose of removing impurities and whitening to improve the grade of minerals.

The barite mineral content was increased from 95.60% before purification to 97.29%, and the main chromophore Fe3 was completely removed. After flotation of low grade barite ore, barite powder with 96.12% whiteness and 89% whiteness of BaSO4 can be obtained by using aluminum powder as reducing agent under acid pickling condition of sulfuric acid.