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INDUSTRY CLUSTER · New materials

Baiyin District resource recovery

“Resource recovery” in Baiyin is not one generic process: zinc-bearing smelting residue enters a rotary kiln, phosphogypsum can become binders or gypsum products, waste mineral oil needs regeneration, and ordinary paper or metal goes through sorting. Every load is first classified by property, code and licence boundary before recovery; valuable metal content does not turn hazardous waste into ordinary feed.

Formation and regional foundations

Long-standing nonferrous, chemical and energy industries generated varied solid by-products, and Baiyin developed routes in metal recovery, chemical-residue materials, construction products and recyclables sorting. The 2021 district figures describe cluster scale, while licence codes, assessment scope, operating status and annual handled amount remain entity-specific.

When a zinc-bearing residue load arrives, the first questions are not how much zinc can be recovered but its process origin, code, receiving licence and representative sample. Only then do kiln blending, metal recovery and residue destination have a verifiable starting point.

Core geography: Centred on industrial-waste recovery firms in Baiyin High-tech Zone and Baiyin District, linking waste characterisation, weighing and sampling, hazardous-waste manifests, segregated storage, rotary-kiln or hydrometallurgical treatment, metal recovery, phosphogypsum use, waste-oil regeneration, off-gas and wastewater control and residue destination

From generating process to lawful destination

Six responsibility handoffs for an industrial-waste lot

Nodes show handoffs of identity, quantity, treatment and destination responsibility; routes differ for zinc-bearing residue, phosphogypsum, waste mineral oil and ordinary recyclables.

  • Generator and waste identity — Process origin, code, hazard properties and lot form pre-entry identity.
  • Manifest, weighing and sampling — Vehicle, manifest, gross and net mass, seal and representative sample are linked.
  • Segregated storage and blending — Compatibility, moisture, heating value, metals and halogens guide segregation and blending.
  • Thermal, wet or materials route — Rotary kiln, separation, regeneration or binder conversion follows material identity.
  • Product, emissions and residues — Recovered product, off-gas, wastewater and secondary residue are measured separately.
  • Lot closure and destination — Product sale, residue transfer, inventory and manifest quantities reconcile.

01 · The first step is identity, not weighing

Residues of one colour can have different codes and hazards.

The generator states the process, inputs, generation time and any deviation. Process origin is important evidence, but it does not by itself replace hazard identification, catalogue code or qualified testing.

Historic analysis informs screening but does not assign last year’s average to today’s load. Feed changes, maintenance, incident clean-up or pond dredging can alter moisture, metals and hazards and trigger resampling.

General industrial waste, hazardous waste, ordinary recyclables and by-products have different transport, storage and destination requirements. Zinc, iron or oil content alone does not determine class; misclassification corrupts manifest, storage and process from the start.

02 · Manifest, vehicle and sample must identify one load

Quantity reconciliation starts at the weighbridge and seal.

At arrival, carrier qualification, plate, packaging, labels, manifest and booked waste are checked. Tears, leaks, odour or mismatch trigger isolation and review before unloading into any common store.

Gross, tare, net and time link automatically to vehicle and manifest, with scale calibration and anti-tamper records. Wet residue that drains while waiting affects both mass-balance basis and leachate collection.

Sampling covers positions, particle segregation and moisture layering before composite preparation and split test and retain samples. Seal, storage temperature and retention align with the manifest so analysis can be tied to the original load during disputes.

03 · Segregated storage keeps two problems from becoming one

Compatibility, moisture and fire risk determine storage.

Accepted waste enters clearly identified zones by property, code, packaging and route. Acids, alkalis, oxidisers, oily materials and reactive dust are not co-stored merely because they may enter one furnace, and floors and bunds suit possible leaks.

The store ledger tracks lot, position, quantity, container condition, retest and issue. Location updates with every move rather than monthly totals; a mismatch between signage and system stops blending until reconciled.

Outdoor storage assesses dust, rain and leachate and controls cover, drainage and collection. Post-rain moisture affects equipment stability and wet-basis metal content, so feed is reconfirmed before use.

04 · The blend sheet starts stable rotary-kiln operation

Recovery, furnace condition and emissions share one feed mix.

Before rotary-kiln treatment, zinc-bearing residue is blended by zinc, lead, iron, sulfur, chlorine, moisture, heating value and size. Maximising zinc alone can overload off-gas controls with chlorine or sulfur and cause rings or unstable operation.

The blend sheet lists every feed lot and mass, and feeders return actual weights. Bridging, belt spillage or recycle can separate plan from reality; operators do not merely edit system numbers without locating material loss.

Temperature, draft, speed, bed and residence respond to blend changes. Abnormal off-gas or elevated metals in residue are traced to exact feeding periods and lots, not explained by a monthly average mix.

05 · Different wastes follow different recovery routes

Thermal, wet, materials and regeneration routes are not interchangeable names.

Rotary volatilisation moves zinc and other volatile components into collected dust used as secondary zinc oxide feed, while residue is separated for iron, carbon and other recoverables. Whether dust is product or hazardous waste depends on quality and legal identity.

Phosphogypsum use controls free acid, soluble phosphorus and fluorine, moisture and applicable radioactivity before neutralisation, ageing, modification or calcination into retarders, binders or plaster. Planned capacity is not proof that every line operates steadily.

Waste mineral oil regeneration removes water, solids, light fractions and degradation products through dehydration, filtration, distillation or refining. Mixed origins change flash point, chlorine and metal load, so collection scope, pretreatment and product standard align with licence and process.

06 · Off-gas, wastewater and secondary residues need accounting

Making a recovered product does not mean the process creates no new waste.

Rotary-kiln gas passes heat recovery, dust collection and desulfurisation, each changing gas and solids. Bypass use, bag failure or sorbent change is recorded and linked to emissions and collected-dust analysis.

Wet treatment and wash water may contain salts, metals or oil; segregated collection matters more than end dilution. Recycled water can accumulate salts and affect leach, washing or product impurities, requiring control limits.

Kiln residue, filter cake, sludge, spent sorbent and off-spec product are reclassified for destination. When secondary residue goes to another entity, a new manifest, carrier and receiving permission are required rather than reusing incoming paperwork.

07 · A recovery rate does not replace mass balance

A percentage is not comparable when numerator and denominator differ.

A firm first states period, material scope, wet or dry basis and what counts as recovery. Receipt, actual feed, closing inventory and returns differ, and dividing product mass by receipts misses moisture and process loss.

Metal recovery uses target-metal content across feed and output streams rather than two wet masses. Assay frequency, representativeness and inventory changes affect the result; monthly anomalies are traced to lots, not hidden in an annual average.

District figures of 7.60 million tonnes and 85 percent describe the 2021 cluster and cannot be allocated to one firm. A firm reporting throughput also states licensed capacity, actual receipt, actual recovery or disposal and inventory change.

08 · A lot closes only when product and waste have destinations

An unnamed residue in storage is a broken responsibility chain.

Recovered products release against standards, specifications, methods and use limits. Secondary zinc oxide, gypsum material or regenerated base oil requires stable quality, contractual use and legal product status, not merely market value.

Product sale documents and waste manifests use different identities. If a lot misses product requirements and becomes waste again, the system changes status, blocks stock and starts a lawful transfer rather than shipping under another name.

The lot file connects generator, transport, manifest, weighbridge, sample, storage, blend, operation, product, emissions and residue destination. For complaints, environmental anomalies or quantity gaps, it shows where material was, who handled it and when it left.

Sources and reading notes

District indicators retain the 2021 scope and are not assigned to individual firms. Planned, operating, licensed and actual throughput are stated separately. Hazardous waste, general industrial waste, ordinary recyclables and compliant recovered products do not share one identity.

  • Baiyin government material records 7.60 million tonnes of recovered resources and an 85 percent recovery rate for the cluster in 2021.
  • The same source records RMB 6.368 billion of recovery output value and 8,421 workers in 2021.
  • The municipal solid-waste notice lists hazardous-waste codes, approved capacity, actual volume and licence validity, showing that general recovery ability does not replace a specific licence.

Related companies

These companies have a locally relevant industry role supported by public information. Order is not a ranking, inclusion does not imply authorization, partnership or endorsement, and Hello China does not participate in or guarantee transactions.

A company may request a free correction or removal through the formal channel if its record is inaccurate or it does not wish to be shown. Do not send business licences, authorization letters or other sensitive files through insecure channels.

  • Baiyin Huaxin Jiuhe Recycling Co Ltd — Huaxin Jiuhe treats zinc-bearing smelting residues in rotary kilns, recovering secondary zinc oxide and separating iron, carbon, silver and other components from kiln residue. Planned, first-phase and expansion capacities are different stages; actual receipt follows licences, assessments and current operation.
  • Gansu Dongfang Titanium Industry Co Ltd — Dongfang Titanium uses industrial by-products including sulfuric acid in titanium-dioxide production and develops phosphogypsum materials and related circular projects. Titanium dioxide, phosphogypsum recovery and battery-material projects are separate plants and products; planned capacities are not one recovery figure.
  • Gansu Kelon Environmental Technology Co Ltd — Kelon Environmental recovers waste mineral oil into regenerated lubricant base oil. Source, hazardous-waste code, water and contaminants and licensed collection scope decide acceptance; refined quality and applicable standards decide product status.
  • Request a company-record correction or removal — Requests are reviewed by a person, handled promptly after verification, free of charge and not tied to commercial cooperation.

Sources

Use the original publishers to check dates, scope and definitions; public material is not a transaction guarantee.