EN
Precipitated barium sulfate is a refined synthetic white inorganic filler, totally different from ordinary ground barite powder which is made by direct ore crushing. Many customers confuse these two materials, while our precipitated barium sulfate adopts customized mineral raw materials and full chemical synthesis process, with purer texture, finer particle size and more stable performance. Made from eco-friendly natural barium ore resources, our product goes through low-pollution chemical reaction, multi-stage purification and standardized drying treatment. It features low impurity content, high whiteness, uniform particle distribution and good dispersion. All raw material sources are traceable, and the whole production process follows international environmental protection standards. With strict batch inspection and stable quality, our precipitated barium sulfate is trustworthy for long-term bulk purchase for global industrial manufacturers.
The core raw material of our precipitated barium sulfate is high-grade natural barite ore from designated mining areas. We select premium barite ore with high barium sulfate content, low heavy metal content and few impurity minerals as the base raw material. Compared with low-grade mixed barite ore on the market, our selected ore has stable mineral composition, less mud, quartz and harmful soluble impurities, which lays a solid foundation for high whiteness and chemical stability of finished products. We have long-term cooperative mining bases, which guarantee stable raw material supply, fixed ore quality and reasonable raw material cost. We refuse inferior leftover ore and recycled industrial residue materials to produce fillers, so our finished powder will not turn yellow, produce sediment or cause equipment corrosion during customer production.
After raw ore collection, we conduct primary physical purification before chemical processing. The crude barite ore is firstly washed, screened and crushed to remove surface soil, sundry stones and impurity minerals. Then purified barite powder reacts with industrial auxiliary materials under constant temperature workshop conditions to generate intermediate barium salt solution. This step adopts segmented reaction control, avoiding excessive chemical additives that will leave residual substances. Different from rough one-step synthesis technology used by small factories, our segmented reaction can adjust particle fineness, oil absorption value and pH value flexibly, to produce customized products for coating, plastic, ink and rubber industries respectively. Every reaction parameter is recorded for batch quality traceability.
Core precipitation reaction and deep purification are the key steps to distinguish high-quality precipitated barium sulfate from ordinary products. Qualified intermediate solution is mixed with purified sulfur-containing solution in sealed reaction tanks to complete neutral precipitation reaction, forming hydrated barium sulfate crystal slurry. The whole reaction is carried out in closed equipment to prevent external dust pollution. Afterwards, the crystal slurry goes through four cycles of press filtration and water washing to remove soluble salt ions, residual alkalis and chemical residues. Sufficient water washing reduces powder conductivity, improves product weather resistance, and prevents paint film bubbling, plastic aging and rubber performance decline caused by residual impurities. This deep purification process is the biggest advantage of our products over cheap crude precipitated powder.
Final drying, grinding and classification processing ensure unified finished product specifications. After impurity removal and filtration, pure barium sulfate filter cake is sent to automatic low-temperature drying equipment. Low-temperature drying will not damage the microscopic crystal structure, so the powder keeps good looseness and dispersion. Then dried materials are ultra-fine ground and graded by professional airflow screening machines, dividing powder into regular mesh specifications for different industrial needs. We add no brightening agent, dye or modifying agent artificially, so the powder owns natural permanent whiteness without fading. Meanwhile, we pack products with moisture-proof packaging materials to avoid caking during sea transportation and long-term storage.
Complete quality control system supports reliable product quality. From raw ore entry to finished product delivery, our testing lab detects whiteness, particle size, moisture content, impurity content and chemical inertness one by one. Unqualified products will be returned to reprocess strictly. Compared with ground barite, our synthetic precipitated barium sulfate has better compatibility with resin and pigment, lower equipment abrasion and higher product fineness. Benefiting from high-quality ore sources, mature purification technology and strict quality management, our products have stable batch difference, eco-friendly performance and cost-effective price. It is a reliable modified filler partner for long-term cooperative customers worldwide.