Shandong Zhongyou Heavy Industry, a leader in China’s hydraulic machinery sector with two decades of experience, has engineered its Energy-Efficient Salt Block Press series to deliver high performance, low energy consumption, and intelligent operation. This makes it an ideal solution for salt processing, livestock nutrition supplementation, and the green transformation of the building materials industry. Through structural optimization, powertrain upgrades, and deep integration of smart control technologies, this series achieves over a 30% reduction in energy use per unit of output, while simultaneously boosting production efficiency and product quality stability, offering a sustainable industrial solution for global clients.
I. Technical Architecture: Modular Design Meets Energy-Saving Innovation
Robust Three-Beam, Four-Column Frame
The press is built on a sturdy three-beam, four-column hydraulic structure. The upper beam, intermediate sliding beam, and worktable form a rigid, closed-frame assembly connected by columns and fastening nuts. The main body, crafted from high-quality alloy steel via computer-optimized design, ensures strength and rigidity for high-pressure forming. The sliding block and worktable feature “T”-slots for quick mold fixation, accommodating production of salt blocks from 2.5 kg to 20 kg. The columns undergo quenching, tempering, and surface hardening (HRC 45-55), combined with hard chrome plating, enhancing wear resistance by 50% and extending service life.
Variable Frequency Drive & Cartridge Valve System
The power system utilizes a YCYI4-IB piston pump integrated with Variable Frequency Drive (VFD) technology. This allows the motor speed to adjust in real-time based on pressing pressure, eliminating the energy waste common with fixed-speed pumps. The hydraulic system employs two-way cartridge valves, reducing flow resistance by 40%, increasing flow rate by 30%, and cutting response time to 0.2 seconds, which significantly minimizes hydraulic shock and energy loss. Test data confirms this system reduces energy consumption per pressing cycle from 0.8 kWh to 0.5 kWh, achieving a 37.5% energy saving rate.
Water Cooling Cycle & Oil Purification Unit
An integrated water-cooling circulation system, via a heat exchanger, maintains hydraulic oil temperature within an optimal 40-50°C range, preventing the viscosity loss and seal degradation caused by overheating. A three-stage filtration system with 5μm precision ensures oil cleanliness meets NAS Class 6 standards, reducing valve wear and leakage risks. This design is calculated to lower hydraulic system failure rates by 60% and reduce maintenance costs by 40%.
II. Production Process: Full Automation and Energy Optimization
Raw Material Pre-treatment & Intelligent Feeding
After mixing in a twin-shaft paddle mixer, raw materials are evenly distributed into the mold cavity by a vibrating feeding device. Equipped with pressure sensors, this device monitors filling density in real-time and auto-adjusts vibration frequency, ensuring density variation per block is ≤1%. Compared to manual feeding, material utilization increases by 8%, reducing waste from trimmings.
Multi-Stage Pressing & Dwell Pressure Technology
The pressing cycle is executed in three precise stages:
Rapid Downstroke: The main cylinder descends at 0.5 m/s for initial shaping.
Multi-Stage Pressing: Pressure gradually increases from 500 tons to a maximum of 1000 tons, held for 2 seconds to ensure uniform internal density.
Dwell Pressure & Slow Release: Pressure increase rate slows to 0.05 m/s, with a 3-second dwell time to prevent powder rebound.
For a 10kg salt block, the complete cycle takes only 18 seconds, enabling a daily output exceeding 2000 blocks. Energy consumption per unit of output is 32% lower than conventional models.
Hot Air Circulation Drying & Waste Heat Recovery
Molded blocks enter a three-stage hot air circulation drying chamber. A waste heat recovery unit captures energy from exhaust air (60°C) to preheat incoming fresh air, lowering exhaust temperature to 40°C. This innovation increases thermal efficiency by 25%, reducing drying energy consumption from 0.3 kWh/kg to 0.22 kWh/kg. Dried products are tested by an online inspection system for hardness (≥85 N/cm²) and density, with non-conforming blocks automatically sorted to a rework line.
III. Performance Advantages: Triple Breakthrough in Efficiency, Quality, and Sustainability.
40% Increase in Production Efficiency
The intelligent PLC control system stores up to 100 sets of process parameters, enabling quick switching between production modes for different block formulations. At a 10,000-cattle farm in Inner Mongolia, equipment operational stability exceeded 99%, and mold changeover time was slashed from 2 hours to 20 minutes, helping the client achieve a 40% increase in monthly orders.
Precise Quality Control
Optimized pressure curves allow for the production of blocks with tailored formulations (sodium, calcium, iron, zinc, etc.), meeting the specific nutritional needs of livestock like dairy cows and sheep at various growth stages. Field data indicates a 12% increase in milk yield for dairy herds and an 18% improvement in lamb survival rates using customized blocks.
Green Manufacturing Practices
The use of low-viscosity environmentally friendly hydraulic oil reduces volatile emissions by 70%. An optional flue gas desulfurization unit controls sulfur dioxide emissions below 25 mg/m³, exceeding national standards. Calculations show a single production line can reduce CO2 emissions by 120 tons annually, equivalent to the environmental benefit of planting 6,000 trees.
IV. Application Scenarios: Global Reach and Customized Service
The Energy-Efficient Salt Block Press has been exported to over 30 countries, including Australia, Brazil, and South Africa, serving diverse clients from family farms to large agricultural conglomerates. Examples include:
Australian Dairy Project: A client using a 1000-ton model to produce high-calcium blocks achieved a machine failure rate below 0.2%, aiding their product’s certification for EU organic standards.
African Ranch Expansion: Custom-shaped molds produced curved blocks for long-horned cattle, improving lick comfort and increasing feed utilization by 25%.
Zhongyou Heavy Industry provides full-cycle support, from site planning and installation to operator training, backed by a 3-year warranty on wear-prone parts like hydraulic seals. Its 24/7 remote diagnostic system ensures prompt response to client needs, guaranteeing production continuity.

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