What raw materials can Ruitu bromine extraction systems process?

Our bromine extraction systems are designed for seawater, bitter brine, salt lake brine, oilfield water, bromine-bearing industrial wastewater and concentrated brine from desalination plants. The process route is selected only after we review a laboratory analysis of your feed.

Do you supply single machines or complete plants?

Both. We supply individual machines such as salt washers, roller crushers, dryers, vibrating screens, belt conveyors and hot air furnaces, and we also deliver complete turnkey lines under an EPC contract.

What is included in your EPC service?

Water quality testing, site selection support, process design, project launch preparation, equipment manufacturing and procurement, packing and shipping, installation and commissioning, operator training, finished product production guidance, and output buy-back or decommissioning support where agreed.

Can your salt washing equipment produce food-grade salt?

Our salt washing machinery is used for both food-grade and chemical-grade salt. The achievable grade depends on the crude salt composition and the standard that applies in your market, so we design the washing, crushing, drying and screening stages around your target specification.

How do you support overseas installation?

Our engineers can be dispatched to site for installation and commissioning, train your operators, and stay involved until the line produces finished product at the designed daily capacity.

How do I start a project with Ruitu?

Send us your raw material analysis, target daily capacity, product specification and site information by email or phone. Our technicians will prepare a preliminary budget estimate and an economic benefit analysis based on your budget and expected output.

Custom Rubber Conveyor Rollers Product & Service

Primary Solutions

Specialized Heavy-Duty Process Equipment Series

High-performance custom conveyor rollers, anti-corrosive lagging, and continuous materials transport machinery deployed across high-salinity and corrosive processing lines.

China Industrial Belt Conveyor Factories, Service

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Custom Hammer Crusher Products, Service

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Custom Heavy-Duty Conveyor Belt For Salt Washing Production Line

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Custom PTFE-Lined Ball Valve Factory, Product

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China PTFE Lined Tower Section Factories, Products

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China PTFE-Lined Check Valve Factories, Service

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China PTFE Lined Pipe Products, Service

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Custom Industrial Hot Air Furnace Product, Products

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Executive Summary

Engineering Precision in Custom Rubber Conveyor Rollers

Strategic material selection, vulcanization kinetics, and hydrodynamic surface profiling for next-generation bulk handling.

60,000+

Design Service Life (L10h)

≤ 0.35mm

Total Radial Runout (TIR)

100%

Brine & Halogen Resistant

ISO 1940

G1.6 Dynamic Balance Rating

The Tribological Imperative in Chemical & Corrosive Material Conveying

Continuous bulk material handling within salt washing plants, bromine extraction facilities, and aggressive chemical processing complexes subjects conveyor components to severe tribological wear and chemical attack. Conveyor rollers (idlers) and drive pulleys operate under continuous dynamic loads while being exposed to saturated brine (NaCl), magnesium chloride (MgCl2), calcium chloride (CaCl2), acidic process mists, and fine abrasive mineral particles. Unprotected steel rollers suffer rapid galvanic corrosion, surface pitting, material accretion (cake buildup), and premature bearing seizure, resulting in catastrophic belt mis-tracking, edge fraying, and unplanned line stoppages.

Weifang Ruitu Automation Equipment Co., Ltd. resolves these operational challenges through precision-engineered custom rubber conveyor rollers. By integrating high-grade synthetic elastomers—including carboxylated nitrile (XNBR), ethylene propylene diene monomer (EPDM), chloroprene (neoprene), and cast polyurethanes—directly onto precision-machined, balanced carbon steel or stainless cores, we provide mechanical drive integrity and continuous corrosion isolation. Our hot-autoclave vulcanization process achieves molecular cross-linking between the bonding agent, the metallic substrate, and the elastomeric mantle, eliminating the risk of shell delamination under severe peripheral shear.

Elastomeric Chemistry

Tailored compounding based on chemical exposure. High-durability formulations resist degradation from hydrocarbon exposure, halogen gas diffusion, and extreme pH shifts.

EPDM mantles for high temperature & oxidative service
XNBR compounds for high tear resistance & abrasion
Food-grade synthetic nitriles compliant with FDA 21 CFR

Dynamic Lagging Geometries

Surface grooving patterns designed to manage fluid displacement, material shedding, and belt-to-roller traction across wet processing circuits.

Diamond (herringbone) grooves for bi-directional shedding
Spiral grooving for continuous return belt cleaning
Plain cylindrical rubber sleeves for carry idler cushioning

Hermetic Bearing Sealing

Multi-stage labyrinth seal assemblies that protect structural rolling bearings from corrosive liquids, salt crystals, and fine chemical dust ingress.

Multi-chamber non-contact POM or Nylon labyrinth rings
Secondary contact lip seals charged with synthetic fluorinated grease
Corrosion-resistant galvanized or polymer rain caps

Engineering Specifications

Custom Roller Technical Roadmap & Parameters

Precise geometric limits, bonding thresholds, and testing standards enforced across our automated manufacturing lines.

Performance / Structural Parameter	Industrial Salt & Brine Circuit	Bromine & Halogen Handling	General Heavy-Duty Mining & EPC
Base Shell Material	Q235B Carbon Steel / SS316L	SS316L / Titanium Gr. 2 / Lined Steel	Seamless Heavy Carbon Steel Tube (API/DIN)
Elastomeric Mantel Compound	Modified Neoprene / Highly Filled SBR	Specialized Halogenated EPDM / Fluoroelastomer	Natural Rubber / Premium Polyurethane Mantle
Hardness Range (Shore A)	65° ± 5° Shore A	70° ± 5° Shore A	60° – 90° Shore A (Application Specific)
Peel Adhesion Strength	≥ 12.5 N/mm (ASTM D429 Method B)	≥ 14.0 N/mm (Cohesive Rubber Failure)	≥ 10.5 N/mm (Metal-to-Elastomer Standard)
Total Indicated Runout (TIR)	≤ 0.40 mm at Center Point	≤ 0.30 mm High-Speed Precision	≤ 0.50 mm Standard Dynamic Tolerance
Bearing Housing Configuration	Deep-drawn steel, robotically welded	Cast stainless or polymer insert housing	Heavy-duty pressed steel, fully welded
Lubrication & Temperature Bounds	-25°C to +90°C (Synthetic lithium)	-20°C to +140°C (Perfluoropolyether)	-40°C to +80°C (Extreme Pressure Grease)

Global Industry Panorama

Procurement Demands & Industry Solutions

How modern chemical plants, industrial salt washing refineries, and bulk fertilizer operations overcome material handling bottlenecks.

Industrial Salt & Chlor-Alkali

Raw sea salt and rock salt contain hygroscopic impurities like magnesium chloride and insoluble clays. Rollers without rubber lagging develop crust build-up that alters the roller diameter unevenly, inducing severe belt wandering. Our rubber disc return rollers and dynamic diamond-grooved drive rollers shed damp cake continuously, maintaining belt alignment and preventing downtime in continuous refinery circuits.

Bromine & Halogen Processing

Vaporized halogens and acidic process washings create aggressive airborne exposure. Standard idlers experience shell wall thinning within months. Ruitu supplies full-coverage vulcanized rollers with PTFE-sealed labyrinths, preventing atmospheric halide penetration and extending service life over 400% compared to basic epoxy-coated steel idlers.

Bulk Fertilizers & Chlorides

Handling granular calcium chloride and potash involves heavy drop impacts at transfer chutes. Impact rubber rollers with specialized buffer rings absorb dynamic loading, protecting the conveyor belt carcass from punctures while shielding internal roller bearings from brinelling and premature mechanical fatigue.

Compliance & Quality

Standards Compliance & Engineering Assurance

Rigorous international validation protocols ensure operational reliability, personnel safety, and compliance with environmental standards.

ATEX & Anti-Static Standards

In explosive chemical, grain, or sulfur-handling zones, electrostatic discharge poses severe fire and explosion risks. Our conductive rubber compounds maintain surface electrical resistance under 300 MΩ in compliance with ISO 284 and DIN 22104, preventing electrostatic accumulation while retaining superior abrasion resistance.

FDA & Food-Grade Compliance

Edible salt refining and pharmaceutical mineral processing demand contamination-free materials handling. We provide non-marking white and blue food-grade rubber formulations meeting FDA 21 CFR 177.2600 and European EC 1935/2004 directives, with zero toxic plasticizers or heavy metal pigments.

CEMA & DIN Dynamic Precision

Every roller shell is manufactured to DIN 22107 and CEMA B/C/D/E standards. Post-vulcanization CNC cylindrical grinding and ISO 1940-1 Grade G1.6 dual-plane dynamic balancing ensure reduced vibration, lower motor power consumption, and extended bearing life across high-speed belts.

Engineering Knowledge Base

Frequently Asked Questions (FAQ)

Clear technical insights into elastomeric selection, maintenance intervals, and custom fabrication parameters.

Cold bonding relies on chemical contact adhesives applied at ambient temperature, which are prone to edge lifting, moisture penetration, and adhesive breakdown when exposed to saline water, brine, or severe peripheral shear stresses. Ruitu utilizes autoclave hot vulcanization: the raw rubber compound is cured directly onto shot-blasted (Sa 2.5), chemlok-primed steel cores under high steam temperature and hydrostatic pressure. This creates a cohesive chemical bond between rubber and steel, preventing mantle delamination.

Smooth cylindrical lagging is typically applied on non-drive idlers or dry material conveyors where slippage is low. Herringbone and diamond patterns are machined onto drive pulleys and wet processing idlers to increase friction and disperse water or slurry away from the belt contact area. Diamond lagging provides bi-directional water dispersion, suitable for reversing conveyors. Herringbone must be oriented in the belt travel direction to direct liquids toward the pulley edges.

Yes. For edible salt purification lines, we manufacture rollers using food-grade white or blue synthetic nitrile or silicone compounds fully compliant with FDA 21 CFR 177.2600 regulations. These rollers are non-toxic, odorless, non-marking, and resistant to regular chemical sanitization, ensuring that food products are protected from carbon-black contamination or plasticizer leaching.

Our heavy-duty chemical idlers incorporate a multi-layer sealing arrangement. This consists of an outer steel or polymer rain cap, an outer labyrinth, a precision multi-stage inner labyrinth seal filled with high-purity water-resistant synthetic grease, and a secondary contact lip seal. This design prevents salt crystal ingress and saline slurry penetration, safeguarding deep-groove 2RS C3 clearance bearings for an L10h service life exceeding 60,000 hours.

To size and engineer your custom roller, our engineering team requires: outer roller shell diameter, finished diameter after rubber lagging, shell face length, shaft diameter, bearing specification, shaft end configuration (flat milled, threaded, or internal bore), conveyed material profile (chemical makeup, temperature, particle size), conveyor belt speed, and operating environment parameters.

Supporting Industrial Hardware