Vacuum Belt Filter Solves Solid-Liquid Separation Difficulties for Lithium Ore Smelting in Frigid Mining Areas-Xinxiang Yinuo Machineries Co., Ltd.

Against the industrial upgrading of mining and chemical sectors in alpine regions, demand for continuous, high-recovery and low-temperature-resistant solid-liquid separation equipment keeps rising across lithium resource exploitation, non-ferrous metal smelting, industrial sludge treatment and other fields.
Lithium resources in high-latitude mining areas are mainly hard-rock lithium ores such as spodumene and petalite, matched with hydrometallurgical smelting processes. Northern alpine mining regions suffer from extreme cold in winter, labour shortages and complex operating conditions. Conventional batch filtration equipment features low efficiency, vulnerability to freezing and blockages, and high operation and maintenance costs, making it unable to meet local production requirements.
Boasting core strengths including fully automatic continuous operation, multi-stage countercurrent washing and customisable low-temperature resistant design, vacuum belt filters have become the mainstream solid-liquid separation equipment tailored for alpine mining areas. They are widely deployed in key local industries including new energy, mining and fine chemicals.

The core pain points of lithium ore processing in high-latitude mining areas fall into four categories: insufficient pulp washing, low lithium recovery rates, equipment incompatibility with low-temperature environments, and high labour costs for operation and maintenance.
Conventional plate-and-frame filter presses and small-scale filtration equipment operate in batch mode, requiring frequent shutdowns for cake discharge and equipment cleaning. Remote alpine mining regions struggle with labour recruitment and face steep labour expenses, so discontinuous production severely restricts the throughput of the entire production line.
Furthermore, pulp generated after acid leaching of hard-rock lithium ores contains highly corrosive media. Standard equipment is susceptible to corrosion and failure. In addition, temperatures dropping to minus 20 to 30 degrees Celsius in winter often lead to frozen pipelines, hardened seals and cracked filter belts, resulting in unplanned production shutdowns.

Tailored to operating conditions in high-latitude alpine regions, Yinuo Machinery’s optimised vacuum belt filters are perfectly matched to core processes for hard-rock lithium ore smelting.
Equipped with a multi-stage countercurrent washing system, the unit delivers integrated operations including lithium slurry filtration, impurity separation, material washing and advanced dewatering. Reverse spray washing enables sufficient recovery of residual lithium elements within the slurry, significantly lifting lithium resource recovery rates and effectively addressing the widespread industry challenge of high material loss during hard-rock lithium ore processing at alpine mining sites.
The filter supports 24/7 unattended continuous operation with fully automatic variable frequency regulation, eliminating frequent manual intervention. It adapts ideally to labour shortages at remote mines and substantially cuts production and operation costs for enterprises.

Customised design for extreme cold working conditions constitutes the core differentiating advantage that enables the equipment to operate in high-latitude alpine mining areas.
To adapt to low-temperature environments in northern alpine regions, the vacuum belt filter can be fitted with pipeline heat tracing and thermal insulation systems as well as low-temperature heating units for electrical control cabinets. Combined with low-temperature-resistant seals and special filter belts, the equipment can run stably under extreme temperatures down to -35°C, completely eliminating issues such as pipeline freezing and blockage, component failure and unplanned equipment shutdowns.
In addition, wetted parts of the machine are constructed from 316L stainless steel and PTFE-lined anti-corrosion materials. These materials withstand long-term erosion by acid-leached lithium ore slurry and corrosive chemical media, adapting to a wide range of complex industrial working conditions and significantly extending equipment service life.

Beyond new-energy lithium ore smelting, this vacuum belt filter also boasts outstanding applicability for traditional industries in alpine regions. It is widely deployed in scenarios including dewatering of non-ferrous metal concentrates, chemical slurry filtration, advanced dewatering of industrial sludge, and tailings dry stacking.
The equipment features a fully enclosed structural design that effectively prevents material volatilization and dust leakage, meeting stringent international environmental emission standards and supporting compliant production for mining and chemical enterprises.
Furthermore, the equipment control system supports multi-language interfaces and enables seamless integration with local DCS central control systems, catering to intelligent production requirements of various enterprises.

Compared with conventional filtration equipment, vacuum belt filters engineered for extreme cold conditions deliver remarkable comprehensive advantages. The fully automatic continuous operation mode greatly boosts production efficiency, while the multi-stage countercurrent washing process improves resource utilisation. Custom cold-resistant and anti-corrosion structures enable reliable performance under extreme working conditions, and standardised wearing part design ensures convenient cross-border spare parts supply.
At present, the equipment is compatible not only with mainstream hard-rock lithium ore smelting projects, but also meets production requirements for pilot lithium extraction projects from oilfield-associated brines in alpine regions. It serves as an all-round solid-liquid separation unit that supports both the upgrading of traditional industries and the development of the new energy sector.

With 17 years of in-depth expertise in the filtration equipment industry, Yinuo Machinery provides modular and customised vacuum belt filter solutions tailored to varied mining and chemical working conditions across different high-latitude alpine regions.
We support clients with full sets of multi-language technical documents, remote commissioning guidance and cross-border spare parts supply services. These offerings effectively address challenges concerning equipment operation, maintenance and after-sales service for overseas customers. We safeguard efficient, stable and cost-effective production for mining and industrial enterprises worldwide.