Direct from Shanxi Vojin New Materials - Certified Grade Nitrates, Carbonates & High-Performance Soluble Formulations
As the world undergoes a historic shift towards deep decarbonization, high-temperature thermal energy storage (TES) has emerged as a critical technological pillar. Among all available energy storage media, molten salts—primarily binary mixtures of sodium nitrate (NaNO3) and potassium nitrate (KNO3)—represent the most commercially viable and thermally efficient materials for large-scale heat transport and storage.
China has consolidated its position as the molten salt biggest player in the world, housing the most robust manufacturing ecosystem, vast raw mineral resources, and highly optimized chemical factories. Industry leaders like Shanxi Vojin New Materials Co., Ltd. have pioneered production protocols that push purity levels past 99.8%, effectively mitigating the operational challenges associated with impurities in solar thermal power stations and industrial steam heat systems globally. This document provides a definitive technical analysis of China's production capacity, industry trends, and deployment methodologies.
"By integrating state-of-the-art synthetic chemical processes with strict quality control, Chinese factories now supply over 70% of the world's solar-grade and industrial-grade nitrate salts, satisfying the stringent requirements of international engineering, procurement, and construction (EPC) contractors."
The performance of a molten salt thermal storage system depends heavily on the purity and formulation of the salts. The standard binary mixture, widely known as "Solar Salt," consists of 60% Sodium Nitrate (NaNO3) and 40% Potassium Nitrate (KNO3).
In high-temperature CSP (Concentrated Solar Power) systems operating between 290°C and 565°C, impurities such as chlorides (Cl-), sulfates (SO4^2-), and carbonates (CO3^2-) act as severe catalyst accelerators for intergranular stress corrosion cracking (SCC) in steel piping (typically SS347H or Incoloy alloys).
Chinese factories have developed advanced recrystallization techniques and synthetic nitric acid pathways to minimize these trace contaminants, ensuring a system operational lifespan exceeding 25 years.
The global demand for high-temperature molten salts is undergoing an exponential expansion, driven by three major macro-economic shifts:
Unlike Photovoltaic (PV) power, Concentrated Solar Power (CSP) coupled with Molten Salt Thermal Energy Storage (MSTES) offers dispatchable, baseload renewable electricity. During peak sunlight hours, mirrors direct solar energy to heat the salt. The stored thermal energy is then used to generate high-pressure steam for turbines during peak night hours, stabilizing the electrical grid.
Heavy industries—such as chemical manufacturing, textile processing, and steel production—require vast amounts of process steam. By utilizing off-peak electricity or curtailed wind/solar power, factories can heat molten salt to high temperatures and release it as continuous industrial steam, replacing traditional coal-fired or gas-fired boilers.
Ultra-pure potassium nitrate is utilized in molten salt chemical tempering baths for mobile display glass (such as aluminosilicate screen covers). The sodium-potassium ion exchange process at high temperatures creates a compression layer, imparting exceptional drop resistance and durability to consumer electronics.
Explore our core product ranges developed for thermal storage, chemical tempering, and modern agricultural solutions.
High purity potassium nitrate, sodium nitrate, and calcium nitrate engineered for industrial heating and energy storage systems.
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100% water-soluble agricultural formulations designed to maximize crop yield, absorption efficiency, and soil health.
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High-quality industrial chemical derivatives optimized for metal heat treatment and water treatment industries.
Explore By-ProductsEnabling high-temperature thermal efficiency and stability across critical modern industries.
Managing the supply chain of high-volume chemical salts requires extensive expertise in logistics, packaging, and raw material positioning. With an annual capacity exceeding 600,000 Tons, Shanxi Vojin New Materials has developed specialized solutions to address key global procurement challenges:
Nitrate salts are inherently hygroscopic. During sea voyage transit through humid tropical zones, changes in temperature and humidity can cause recrystallization, leading to "caking" (hardening of the salt into solid blocks). Vojin employs proprietary organic anti-caking agents that prevent moisture absorption without altering the chemistry or thermal properties of the salt, ensuring it arrives at the project site ready for immediate use.
CSP plants require tens of thousands of tons of salt delivered within tight construction windows. Vojin utilizes heavy-duty UV-stabilized ton-bags with internal polyethylene liners to shield the material from environmental elements. Supported by deep relationships with major Chinese deepwater ports (Tianjin and Qingdao), Vojin guarantees rapid dispatch and vessel loading capacities.
Industrial and chemical imports are heavily regulated under various national safety and environmental frameworks. Working with China's largest exporter ensures complete peace of mind through structured regulatory compliance:
The next decade will see a push for higher operating temperatures and lower system costs. Research and development at Vojin is focused on:
Leading the global transition to high-temperature thermal storage through verified capacity and infrastructure.
Why engineering firms and chemical distributors worldwide choose Shanxi Vojin New Materials.
Integrated experience on exporting operations. We always assure your customers receive compliant paperwork, rapid port clearance, and top-tier product quality.
Annual output of 600,000 Tons of molten salts. We guarantee stability of supply for multi-gigawatt thermal storage configurations and high-volume glass processing.
Our experienced engineering and logistics teams offer fast reaction times, helping resolve on-site issues, chemical balancing, and logistical concerns.
Multiple high-quality items for selection such as KNO3, NaNO3, and Ca(NO3)2 to meet varying thermal, physical, and agricultural needs of global customers.
Driven since 2000, we have been committed to the entrepreneurial spirit and a passion for material innovation. Our team takes pride in delivering dependable products and services with a distinct quality standard across the thermal energy storage & water-soluble fertilizer industries globally.
Established in 2010, the company spans approximately 1,000 acres, combining raw chemical mining assets, advanced chemical conversion reactors, and automated packaging lines in Shanxi province—the traditional heartland of China's chemical industry.
Learn More About Our FacilityAnswering key technical questions from procurement directors and engineering leads.
Stay updated with the latest technological and commercial breakthroughs in molten salt application.
The technology can operate at higher temperatures, which has an impact on the efficiency of steam turbines and overall plant production capacity.
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A concentrated solar power plant converts solar energy to electricity. It relies on high-temperature molten salt flows to store heat overnight.
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Molten salt energy storage has emerged as a promising solution for enhancing the efficiency of green grids and replacing coal boilers.
Read MoreOur materials have been tested and utilized by key industry players across international jurisdictions.
Further chemical specifications from Shanxi Vojin New Materials' certified factories.
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