As the global energy shift accelerates, the demand for reliable energy storage options has peaked. Among the practical utility-scale thermal energy technologies, nitrate-based molten salts are leading in efficiency. Typically consisting of binary or ternary compositions of high-purity potassium nitrate ($KNO_3$) and sodium nitrate ($NaNO_3$), these compounds serve as the thermal engine for Concentrated Solar Power (CSP) plants, industrial steam recovery operations, and grid-scale energy storage. With their high thermal density and stability at high temperatures, molten salts facilitate a continuous supply of electricity, transforming solar power into a reliable dispatchable resource.
Our standard thermal salt blend (historically called 'Solar Salt') consists of 60% Sodium Nitrate ($NaNO_3$) and 40% Potassium Nitrate ($KNO_3$). Under optimal conditions, this eutectic and near-eutectic mixture provides specific heat capabilities ($C_p$) exceeding $1.5 \text{ J/g}\cdot\text{K}$ at operating ranges. The quality rating of these salts is determined during the fractional crystallization process. If traces of sodium or potassium oxides remain, the melting point changes, causing crystallization and risk of blockages inside thermal pipes.
Shanxi Vojin New Materials utilizes high-purity synthetic nitric acid reacting with sodium and potassium carbonates under computerized feedback systems. This limits chloride content to less than 100 ppm, extending the operational lifespan of CSP plants to over 30 years without the need for extensive pipe replacements.
Essential chemical salts including $KNO_3$, $NaNO_3$, and calcium formulations designed for industrial heat transfers, glass manufacturing, and process chemistry.
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Fully water-soluble macro and micronutrients formulated for fast uptake in modern fertigation networks and industrial greenhouse applications.
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Specialized secondary salts and chemical compounds refined for industrial waste processing, metal heat treating, and custom formulations.
View SeriesActing as a thermal medium for Concentrated Solar Power (CSP) facilities. Our salts safely store thermal energy during the day to generate steam for grid power at night.
Supplying ultra-refined potassium nitrate for chemical glass strengthening processes. This is key for high-strength smartphone covers and digital display monitors.
Delivering high-temperature process heat for petrochemical processes, oil sand recovery, and coal gasification, substituting direct gas firing with clean stored heat.
Supplying high-purity water-soluble potassium nitrate ($KNO_3$) to boost crop resilience, increase yields, and optimize modern drip irrigation systems.
Driven since 2000, we have been committed to the entrepreneurial spirit and passion for innovation. Our team takes pride in delivering dependable products and services with a quality distinction in thermal energy storage & water-soluble fertilizer industries globally.
Located in the heart of China's heavy chemical raw material hub, our production plants are optimized to source raw materials efficiently. This enables us to maintain continuous operation and supply consistency even amidst global logistical changes.
View Corporate HistoryIntegrated global export processes. We handle all logistics, compliance documentation, and customs procedures to ensure on-time delivery.
600,000 tons annual capacity of molten salts and nitrates ensures consistent volume supply, mitigating the risk of project construction delays.
Our experienced chemical and thermal engineers are available to resolve handling, safety, pumping, and thermal degradation issues at your facility.
Flexible procurement options spanning KNO3, NaNO3, Ca(NO3)2, and custom ternary formulations designed to lower thermal melting thresholds.
Choosing a molten salt partner requires evaluating their raw material security. Our primary manufacturing facility is located in Shanxi, China, which provides strategic geographical benefits. By utilizing direct pipelines to synthesize nitric acid ($HNO_3$) and having close proximity to major potassium carbonate production nodes, we minimize transport costs for precursor materials. This integrated structure limits vulnerability to transport delays, offering stable price control compared to competitors lacking localized feedstocks.
Our quality verification system tests raw materials before processing. Trace metals like iron ($Fe$), lead ($Pb$), and chromium ($Cr$) are monitored using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) to keep them within safe thresholds. High trace metals can accelerate oxidation reactions in storage tanks, potentially reducing the operational lifespan of solar thermal storage systems.
The industry is transitioning toward high-temperature configurations. Although traditional solar salts perform reliably up to 565°C, next-generation CSP designs target temperatures above 600°C. Vojin's technical team is researching ternary formulas and nanoparticle-enhanced salts. Adding silica nanoparticles is being tested to raise the specific heat capacity ($C_p$) by up to 10-15%, which could lower the required volume of salt and reduce overall infrastructure costs.
Recent developments in molten salt technologies allow systems to operate at higher temperatures, directly improving steam turbine performance.
Concentrated solar plants convert solar energy into reliable electricity. Learn how dual-tank hot and cold salt storage architectures prevent energy drops.
Thermal energy storage is a viable option for grid balancing, helping steel and concrete manufacturers reduce greenhouse emissions.
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