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Marketplace/Non-Ferrous Zinc/Zinc Dross
Zinc Dross
Non-Ferrous Zinc

Zinc Dross

Grade: Scrub/SealLow-Medium Tier

Galvanizer zinc dross and skimmings

Market Price EstimateUpdated Daily
$1,450/ MT
+45 (3.2%)vs yesterday
Verified specifications & market data
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Certification Requirements

Required certifications, standards compliance, and verification protocols.

ISO 9001:2015 Quality Management System
Scope

Zinc dross collection, handling, composition verification, waste stream management

Requirement
  • Supplier Must Maintain Active Iso 9001 Certification Throughout Contract Term
  • Zinc Waste Expertise Documented
Certification BodyAccredited third-party audit body with zinc dross/galvanizing specialization
RenewalAnnual audit required; dross recycling standards maintained
Certificate of Analysis
Content
  • Zinc content: 85-95% by weight DOCUMENTED (DROSS SPECIFICATION; lower than pure zinc due to oxide content)
  • Iron oxide: <10% confirmed (galvanizing bath residue; protective characteristic)
  • Iron metal: <8% verified (contamination control)
  • Aluminum: <3% quantified (galvanizing bath additives)
  • Copper: <2% documented (bath contamination trace)
  • Lead: <1% verified (legacy galvanizing contamination)
  • Cadmium: <0.1% documented (HAZMAT CRITICAL - occupational health concern)
  • Chromium: <1% quantified (coating bath residue trace)
  • Moisture: <2% verified (post-drying acceptance)
  • Ash/oxides: <5% documented (dross characteristic)
  • Material identity: ZINC DROSS CONFIRMED (galvanizing waste; oxide-rich composite; not ferrous slag)
  • Source: Hot-dip galvanizing facility origin documented
Cadmium Hazmat Screening
Explicit Requirement
  • Must State Explicitly: 'Cadmium <0.1% Verified (Occupational Health Protocol Acceptable)
  • Dross Processing Worker Safety Confirmed
  • Hazmat Exposure Risk Controlled
  • Environmental Contamination Risk Acceptable
  • Worker Protection Protocols Established'
ISRI Scrub/Seal Grade Verification
Content
  • Grade: ISRI Scrub/Seal (zinc dross/skimmings)
  • Zinc: 85-95% confirmed
  • Composition: Iron oxide + zinc composite verified
  • Source: Galvanizing facility confirmed
  • Form: Dross and skimmings verified
Explicit Requirement
  • Must State Explicitly: 'Zinc Dross, Isri Scrub/Seal Grade Confirmed
  • Zn 85-95% Verified
  • Galvanizing Process Waste Authenticated
  • Oxide-Rich Composite Verified
  • Dross Form Characteristic Confirmed
  • Commodity Grade Specification Met'
Galvanizing Source Documentation
Explicit Requirement

MUST state:

  • Zinc dross source: hot-dip galvanizing facility [facility name/location] CONFIRMED
  • process waste origin DOCUMENTED
  • material traceability ESTABLISHED
  • galvanizing waste authenticity VERIFIED
Iron Oxide & Composition Assessment
Explicit Requirement

MUST state:

  • Iron oxide <10% verified (galvanizing residue acceptable)
  • iron metal <8% documented (contamination control)
  • aluminum <3% confirmed (bath additive)
  • dross composition ESTABLISHED
  • processing compatibility VERIFIED
Moisture Control Certificate
Explicit Requirement

MUST state:

  • Moisture <2% verified (post-drying condition)
  • drying protocol ESTABLISHED
  • material condition ACCEPTABLE for transport
  • storage condition SUITABLE
  • drying maintenance required [specify protocol]
XRF Elemental Analysis
Explicit Requirement

MUST state:

  • XRF elemental profile complete
  • Zn 85-95% confirmed
  • Fe-oxide <10%, Fe-metal <8%, Al <3%, Cd <0.1% all verified
  • dross specification MET
  • hazmat acceptable
  • processing compatibility ESTABLISHED
Dross Processing Protocol
Content
  • Roasting yield: estimated zinc and zinc oxide recovery percentage
  • Processing temperature: typical roasting protocol specified
  • Residue management: slag/residue disposal protocol established
  • Environmental: off-gas treatment protocol specified
Explicit Requirement

MUST state:

  • Material CERTIFIED suitable for dross roasting
  • zinc oxide-rich composition ESTABLISHED
  • roasting yield ESTIMATED
  • processing protocol VIABLE
  • zinc recovery feasibility CONFIRMED
Insurance Certificate
Minimum Coverage
  • Low-Value Commodity
  • Moderate Cadmium Hazmat
  • Occupational Risk Standard

Rejection Criteria

Conditions and thresholds that trigger immediate rejection or downgrading.

Zinc content insufficient
Threshold

Zn <85%

Action

FULL REJECTION or severe downgrading

Reason
  • Material Below Dross Specification
  • Processing Viability Compromised
  • Recycling Economics Marginal
Test Method
  • Xrf Verification
  • Zinc Quantification
Severity

CRITICAL - SPECIFICATION VIOLATION

Consequence:
  • Full Rejection Or Substantial Downgrading
  • Material Unsuitable For Dross Processing
Cadmium contamination excessive
Threshold

Cd >0.1%

Action
  • Immediate Full Rejection
  • Hazmat Protocols Required
Reason
  • Hazmat Critical: Cadmium Exceeds Occupational Safety Limit
  • Worker Protection Risk Extreme
Test Method
  • Icp-Aes Verification
  • Cadmium Detection Ppm Level
Severity

ABSOLUTE CRITICAL - OCCUPATIONAL HEALTH VIOLATION

Consequence:
  • Full Rejection
  • Hazmat Emergency Investigation
  • Worker Safety Concern
  • Regulatory Reporting
Iron contamination excessive
Threshold

Fe >8% OR Fe-oxide >10%

Action

Full rejection or substantial reclassification

Reason
  • Iron Exceeds Dross Tolerance
  • Processing Difficulty Extreme
  • Yield Degradation
Test Method
  • Xrf Verification
  • Iron Quantification (Oxide Vs. Metal)
Severity

CRITICAL - PROCESSING TOLERANCE

Consequence:
  • Full Rejection Or Substantial Downgrading
  • Processing Economics Marginal
Moisture excessive
Threshold

Moisture >3% OR visibly wet material

Action

Full rejection or mandatory drying requirement

Reason
  • Moisture Exceeds Acceptable Threshold
  • Processing Difficulty
  • Transport Risk
  • Material Degradation
Test Method
  • Loss On Ignition Or Moisture Analyzer
  • Visual Assessment
Severity

CRITICAL - MATERIAL CONDITION

Consequence:
  • Full Rejection Or Mandatory Re-Drying
  • Material Unsuitable For Transport
Ferrous slag or non-dross waste detected
Threshold

Material identified as ferrous slag OR >10% non-dross contamination

Action

FULL REJECTION

Reason
  • Material Is Not Zinc Dross
  • Wrong Material Stream
  • Processing Protocol Violated
Test Method
  • Material Analysis
  • Magnetic Testing
  • Visual Confirmation
Severity

CRITICAL - MATERIAL IDENTITY FAILURE

Consequence:
  • Full Rejection
  • Material Unsuitable For Dross Processing
  • Wrong Commodity Stream
Unknown composition or source
Threshold

Cannot confirm dross origin OR hazmat status unverifiable

Action
  • Full Rejection
  • Quarantine Pending Investigation
Reason
  • Material Identity Uncertain
  • Galvanizing Source Unconfirmed
  • Cadmium Hazmat Risk Unverifiable
Test Method
  • Material Analysis
  • Dross Authentication
  • Source Documentation Verification
Severity

CRITICAL - IDENTITY/SAFETY FAILURE

Consequence:
  • Full Rejection
  • Material Quarantined
  • Comprehensive Investigation Mandatory
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