Minerals & Metals

Calcium Carbide Stones are a primary and unprocessed bulk form of Calcium Carbide, typically ranging in size from 15mm to 25mm. They are produced directly in an electric arc furnace at extreme temperatures (~2,200°C) from a mixture of lime and coke. This lump form is the foundational product from which other forms like granules or powder are derived, and it is primarily used in large-scale industrial applications such as acetylene generation for gas welding/cutting and as a desulfurizing agent in steelmaking. Wanding provides this high-quality, industrial-grade product to meet robust industrial demands. Shape: white crystals, black lumps, purple or gray cross-section for industrial products Available particle size: 1-4mm, 4-7mm, 7-15mm, 15-25mm, 25-50mm, 50-80mm, 80- 120mm. Gas production: 210L/KG, 230L/KG, 260L/KG, 295L/KG, depending on the size of the particles.  Physicochemical Properties: The solid of the ore is brown or black solid, the pure product is white crystal (containing CaC2 is purple). Density 2.22g/cm3, melting point 2300℃ (with CaC2 content), immediately react violently with water to generate acetylene and release heat, calcium carbide content of different melting point will also change.

Calcium Carbide 7-15mm is widely used in various industrial processes, including nitrogen fixation in cyanamide production and sulfur removal in the steelmaking industry. This chemical compound appears as a gray to black solid and exhibits high reactivity with water. Calcium Carbide is widely used in various industrial processes, including nitrogen fixation in cyanamide production and sulfur removal in the steelmaking industry. This chemical compound appears as a gray to black solid and exhibits high reactivity with water. With a density of approximately 2.22 g/cm³ and a molecular formula of CaC₂, it plays a crucial role in the production of acetylene, which is essential for oxyacetylene welding. In ladle treatment facilities, Calcium carbide 7-15 mm for acetylene production acts as an efficient deoxidizer and serves as a fuel to enhance the scrap ratio to liquid iron in steelmaking processes. The use of Calcium Carbide for Welding 7-15 mm (1) Acetylene from calcium carbide with water can synthesize many organic compounds. For example: synthetic rubber, artificial resin, acetone, ketene, carbon black, etc; At the same time, acetylene oxygen flame is widely used for metal welding and cutting. (2) When heating powdered calcium carbide with nitrogen, the reaction generates calcium cyanamide, which is called lime nitrogen. The cyanide melt generated by the reaction of heated lime nitrogen with table salt is used in gold mining and non-ferrous metal industries. (3) Calcium carbide itself can be used as a desulfurizer in the steel industry.

Calcium carbide granules are a key processed form of Calcium Carbide (CaC₂). Industrially produced in an electric arc furnace at ~2,200 °C, they are essential for generating acetylene, steelmaking, and more. Our industrial-grade product meets strict standards (GB209-2006) and is verified by international inspections (SGS/CIQ/BV). Wanding supplies this reliable, high-quality product for global industrial needs. Calcium Carbide Granule Applications Acetylene Gas Production: Generates a portable and on-demand fuel source for metal cutting/welding and chemical synthesis. Steelmaking (Desulfurizer): Efficiently removes sulfur impurities from molten iron/steel to improve product quality. Calcium Cyanamide Production: Serves as a key precursor for nitrogen fertilizers and various industrial chemicals. Other Industrial Uses: Assists in wastewater treatment (phosphate removal) and acts as a powerful desiccant.

Neoprene Rubber Bearing Pads are essential elastomeric components widely used in bridge construction, commercial buildings, and industrial applications to absorb shock, distribute loads, and accommodate structural movements. Manufactured from durable chloroprene rubber (neoprene), these bearing pads offer excellent resistance to weathering, ozone, temperature fluctuations, and chemicals, making them suitable for both indoor and outdoor environments. Available in plain and laminated types, plain neoprene pads provide reliable performance for static loads and foundational support, while laminated variants —with reinforcement layers such as PTFE or stainless steel—enhance durability and allow for thermal expansion and multidirectional movement. Commonly used in bridge supports, seismic retrofitting, machinery bases, and expansion joints, Neoprene Rubber Bearing Pads comply with international standards like AASHTO and ASTM, and are engineered to ensure long-term performance, flexibility across wide temperature ranges, and reduced maintenance in modern infrastructure.

Round Laminated Elastomeric Bearing Pads are structural support elements used in bridges and buildings to absorb vertical loads and accommodate horizontal movements such as thermal expansion, seismic activity, and wind-induced shifts. These bearings consist of multiple layers of natural or neoprene rubber bonded with internal steel plates, providing a balance of flexibility and strength. Their circular design ensures even load distribution and allows for efficient rotational and shear deformation, reducing stress on supporting structures. Widely used in highway bridges, precast concrete structures, and seismic isolation systems, these pads offer long-term durability, resistance to aging, and consistent performance under varied environmental and load conditions.

Rectangular Laminated Elastomeric Bearing Pads are essential components in bridge and structural engineering, designed to support vertical loads while accommodating horizontal movement and rotational deflection. These bearing pads are constructed by alternating layers of high-strength natural or chloroprene rubber and steel plates, which are vulcanized together to form a durable, flexible unit. The laminated structure allows the pad to effectively distribute loads, absorb vibrations, and adapt to movements caused by thermal expansion, traffic loads, or seismic activity. Ideal for use in straight-span bridges, viaducts, flyovers, and buildings, rectangular laminated elastomeric bearing pads provide long-term performance, excellent weather resistance, and are commonly specified for structures requiring precise load transfer and movement control.

Elastomeric Bridge Bearing Pads are essential structural components designed to support bridge loads while accommodating movements caused by thermal expansion, contraction, and vibrations. Made from high-quality natural rubber or neoprene, these bearing pads provide excellent elasticity, compressive strength, and durability, ensuring effective load transfer between bridge superstructures and substructures. Their ability to absorb shocks and reduce vibration enhances bridge stability and extends structural lifespan. Commonly used in highway bridges, railway bridges, and viaducts, elastomeric bearing pads are preferred for their maintenance-free performance, corrosion resistance, and ability to function in varying environmental conditions.

Spherical Bridge Bearings are specialized structural bearings designed to support heavy vertical loads while allowing smooth rotational and limited translational movements in bridges and large-span structures. Composed of a precision-machined steel spherical surface combined with PTFE or composite sliding materials, these bearings efficiently transfer loads from the superstructure to the substructure while accommodating thermal expansion, rotational deformation, and seismic forces. Known for their high load-bearing capacity, excellent durability, and resistance to extreme weather and corrosion, spherical bridge bearings are widely used in highway bridges, railway bridges, viaducts, and large concrete or steel structures, ensuring structural safety, extended service life, and reduced maintenance requirements.

Pot bridge bearings are structural components designed to support large vertical loads while accommodating limited rotational and horizontal movements in bridges and heavy structures. Comprising a steel pot, an elastomeric disc, and a piston, these bearings transfer vertical loads through confined elastomeric compression while allowing rotational movement due to the deformation of the elastomeric disc. Pot bridge bearings are widely used in highway bridges, railway bridges, and other infrastructure where high vertical load capacity, durability, and minimal maintenance are required. Their robust design ensures stable performance under heavy loads and temperature variations, making them ideal for long-span bridges and structures requiring reliable load distribution and movement accommodation.

Lead Rubber Bearings (LRB) are advanced seismic isolation devices engineered to protect bridges, buildings, and other critical structures from earthquake damage by minimizing vibrations and dissipating seismic energy. These bearings are made of alternating layers of natural or neoprene rubber and reinforced steel plates, with a lead core securely embedded in the center. The rubber layers provide flexibility and allow controlled horizontal movement, while the steel plates ensure high vertical load-bearing capacity. During seismic events, the lead core undergoes plastic deformation, absorbing and converting seismic energy into heat, which reduces structural acceleration and lengthens the vibration period. Widely applied in highway bridges, railway systems, high-rise buildings, and essential infrastructure, lead rubber bearings offer superior load distribution, long-lasting durability, and cost-effective seismic protection.

High Damping Rubber Bearings (HDRB) are advanced seismic isolation devices designed to protect bridges, high-rise buildings, and critical infrastructure from earthquake damage. These bearings are constructed from alternating layers of natural or neoprene rubber and steel reinforcement plates, providing high vertical load capacity and exceptional horizontal flexibility. Their unique damping properties allow effective energy dissipation by converting seismic energy into heat, reducing structural acceleration and extending the vibration period during earthquakes. High Damping Rubber Bearings are widely used in highway bridges, railway systems, and industrial buildings due to their excellent durability, corrosion resistance, and maintenance-free performance. Available in both round and rectangular shapes, standard sizes typically range from 200 mm × 300 mm to 600 mm × 600 mm, with thicknesses from 50 mm to 200 mm, and custom dimensions can be manufactured upon request.

Seismic isolation rubber bearings are structural components designed to reduce seismic forces and horizontal displacements transmitted to bridges and buildings during earthquakes. These bearings typically include high damping rubber bearings and lead rubber bearings, each offering different energy dissipation properties. High damping rubber bearings absorb vibrations effectively, while lead rubber bearings provide high ductility, enabling quick recovery after seismic events. By introducing a flexible layer between the superstructure and foundation, seismic isolation bearings extend the vibration period of the structure, reduce acceleration, and protect structural integrity. They are widely applied in highways, railway bridges, residential complexes, hospitals, and critical infrastructure across various seismic zones and soil conditions.

Friction Pendulum Seismic Isolation Bearings are advanced structural components designed to reduce seismic impact on buildings and infrastructure by utilizing the pendulum effect and controlled friction. These bearings consist of a combination of spherical sliding surfaces, friction plates, guide devices, and damping assemblies that work together to convert earthquake-induced kinetic energy into heat through friction, while also allowing controlled horizontal displacement and vertical load transfer. Their structural design includes upper and lower bearing plates, stainless steel sliding interfaces, rubber sealing rings, and a spherical pendulum mechanism that extends the natural vibration period of a structure, thereby reducing acceleration and enhancing seismic protection. Available in fixed (GD), one-way sliding (DX), and multi- directional sliding (SX) types, Friction Pendulum Bearings accommodate various movement demands and structural layouts. Key advantages include automatic re- centering, reliable performance across different load conditions, and minimal influence from environmental factors. These bearings are widely applied in bridges, high-rise buildings, hospitals, museums, and other critical facilities in seismic zones, ensuring long-term durability, energy dissipation, and structural resilience during earthquakes.

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