Subject: Export Stamp Mill Gold Mining Trading Company – HighCapacity Ore Processing Solutions for Commercial Operations

1. PEMBUKAAN PAINPOINT DRIVEN

Your gold recovery operation faces a persistent bottleneck: achieving optimal liberation of precious metals from hardrock ore without excessive fines generation or prohibitive energy costs. Traditional crushing circuits often produce inconsistent particle sizes, leading to downstream recovery losses of 815% in cyanidation or gravity circuits. Meanwhile, outdated stamp mill designs suffer from high wear rates—replacing shoes and dies every 400600 operating hours—resulting in unplanned downtime costing $2,500$5,000 per shift in lost production.

Are your current milling solutions delivering less than 85% liberation efficiency below 75 mikron? Are you spending more than $0.18 per ton on wear parts alone? For plant managers and engineering contractors seeking reliable, exportready equipment, The Syarikat Perdagangan Perlombongan Emas Kilang Setem Eksport provides a standardized solution engineered for continuous, highthroughput operations in remote environments.

2. GAMBARAN KESELURUHAN PRODUK

The Syarikat Perdagangan Perlombongan Emas Kilang Setem Eksport offers a complete, preconfigured stamp mill system designed for primary and secondary gold ore reduction. This is a gravityoperated, multistamp crushing unit that processes feed material through controlled impact and attrition.

Aliran Kerja Operasi:
1. Penyediaan Makanan: Runofmine ore (80% passing 150mm) is fed via a vibrating grizzly feeder into the mill hopper.
2. Stamp Drop Sequence: A camdriven shaft lifts and releases 510 setem (each 400800 kg) in a timed sequence, dropping 90120 times per minute onto the ore in the mortar box.
3. Pengurangan saiz: Ore is crushed between the stamp head (kasut) and the die plate. Air diperkenalkan untuk menghasilkan buburan, which passes through a discharge screen (biasanya 2040 mesh).
4. Pelepasan Buburan: The milled slurry flows to a secondary classification system (mis., hydrocyclone or concentrating table).
5. Pengurusan Tailing: Bahan bersaiz besar diedarkan semula; undersize proceeds to recovery.

Skop Permohonan:

• Primary Use: Hardrock gold ore (urat kuarza, sulfide ores) with a Bond Work Index of 1218 kWj/t.
• Batasan: Not suitable for clayrich or highly abrasive ores (mis., >20% free silica) without prewashing. Saiz suapan maksimum: 150mm.

3. CIRI TERAS

HeavyDuty Cast Steel Mortar Box | Asas Teknikal: Highchrome alloy construction (450 BHN minimum) | Faedah Operasi: Resists deformation under 800 kg stamp impacts, reducing shell replacement frequency by 40% | Kesan ROI: Extends component life to 8,000+ waktu operasi, lowering annual maintenance costs by $12,000$18,000

Variable Speed Cam Shaft Drive | Asas Teknikal: Hydraulic or electric motor with VFD control (0120 rpm) | Faedah Operasi: Adjust drop frequency to match ore hardness, preventing overgrinding and reducing slimes generation | Kesan ROI: Improves gold recovery by 35% in gravity circuits through optimized particle size distribution

SelfLubricating Stamp Guides | Asas Teknikal: Oilimpregnated bronze bushings with sealed bearing housings | Faedah Operasi: Eliminates daily manual greasing, reducing operator labor by 2 jam setiap syif | Kesan ROI: Menjimatkan $6,000$9,000 annually in labor costs for a 3shift operation

Reka Bentuk Bingkai Modular | Asas Teknikal: Diketatkan, preassembled steel frame (ISO 9001 diperakui) | Faedah Operasi: Reduces onsite installation time from 14 hari ke 4 hari; no welding required | Kesan ROI: Cuts project mobilization costs by 30% for remote sites

Sistem Penindasan Habuk Bersepadu | Asas Teknikal: Water spray nozzles at feed point and discharge chute | Faedah Operasi: Reduces airborne silica dust to <0.5 mg/m³, meeting OSHA PEL standards | Kesan ROI: Avoids potential fines of $10,000$70,000 per violation and reduces respiratory PPE costs

QuickChange Shoe and Die Assembly | Asas Teknikal: Tapered locking pins and predrilled bolt patterns | Faedah Operasi: Enables shoe replacement in 45 minutes vs. 3 hours for conventional designs | Kesan ROI: Increases equipment uptime by 6%, adding 5070 operating hours per year

Antara Muka Pemantauan Jauh | Asas Teknikal: PLCbased control with Modbus RTU output | Faedah Operasi: Provides realtime data on stamp drop count, beban motor, and slurry density | Kesan ROI: Membolehkan penyelenggaraan ramalan, reducing unplanned downtime by 20%

4. KELEBIHAN KOMPETITIF

| Metrik Prestasi | Piawaian Industri (Conventional Jaw/Cone Circuit) | Export Stamp Mill Gold Mining Trading Co. Penyelesaian | Kelebihan (% Penambahbaikan) |
| : | : | : | : |
| Liberation Efficiency (<75μm) | 7278% | 8892% | +18% |
| Penjanaan Denda (<10μm) | 1822% | 812% | 45% (less slimes) |
| Kos Bahagian Pakai setiap Tan | $0.22 $0.28 | $0.14 $0.18 | 36% |
| Masa Pemasangan (10kilang setem) | 1822 hari | 46 hari | 73% |
| Masa Min Antara Kegagalan | 350 jam | 1,200 jam | +243% |
| Penggunaan tenaga (kWj/t) | 1824 | 1417 | 22% |

5. SPESIFIKASI TEKNIKAL



| Parameter | Spesifikasi (10Stamp Model) |
| : | : |
| Penilaian Kapasiti | 58 tan per jam (asas makanan kering) |
| Keperluan kuasa | 75 kw (100 Hp) motor elektrik, 480V/60Hz (or 380V/50Hz) |
| Stamp Weight per Unit | 600 kg (1,323 lbs) |
| Drop Height | 250 mm (9.8 inci) |
| Drop Frequency | 90110 jatuh seminit (boleh laras) |
| Discharge Screen | 2040 mesh (0.840.42 mm) keluli tahan karat |
| Spesifikasi Bahan | Mortar box: ASTM A148 Grade 8050; Shoe/Die: 15% chromium white iron (650 BHN) |
| Dimensi Fizikal (L x W x H) | 6.5m x 3.2m x 4.8m (21.3 kaki x 10.5 kaki x 15.7 ft) |
| Jumlah Berat | 28,000 kg (61,730 lbs) |
| Julat Operasi Persekitaran | 10°C to 50°C (14°F to 122°F); altitude up to 4,000m |
| Tahap Kebisingan | 92 db(A) di 1 meter (with enclosure) |

6. SENARIO APLIKASI

Artisanal to Commercial Transition, Afrika Barat | Cabaran: A client processing 50 tpd of quartz vein ore was losing 12% of gold due to overgrinding in a hammer mill, creating excessive slimes that bypassed gravity tables. | Penyelesaian: Installed a 10stamp Export Stamp Mill with VFD control, set to 95 drops/min with a 30mesh screen. | Keputusan: Gold recovery increased from 78% ke 91%. Slimes content reduced from 18% ke 9%. Payback period: 8 bulan.

Remote HighAltitude Operation, Andes Region | Cabaran: An engineering contractor needed a mill that could operate at 4,200m elevation with limited skilled labor and no welding capability onsite. | Penyelesaian: Deployed a preassembled, boltedframe 8stamp mill with selflubricating guides and a hydraulic cam drive. | Keputusan: Installation completed in 5 days by a 3person crew. Mill achieved 95% uptime over 18 bulan. Wear part consumption was 0.16 kg/tan, 30% below industry average.

Sulfide Ore PreTreatment, Nevada | Cabaran: A midtier producer needed to liberate fine gold from pyrite before flotation, but existing cone crushers produced 40% bersaiz besar (+100 mesh). | Penyelesaian: Integrated a 12stamp mill as a secondary stage, set to 105 drops/min with a 28mesh screen. | Keputusan: Feed to flotation was 92% berlalu 100 mesh. Flotation recovery improved by 6.5%. Energy cost per ton dropped from $0.42 ke $0.33.

7. PERTIMBANGAN KOMERSIL

Peringkat Harga Peralatan (FOB Port of Export):

• Standard 5Stamp Mill: $185,000 $220,000 (termasuk motor, rangka asas, panel pemula)
• Standard 10Stamp Mill: $340,000 $395,000 (includes VFD, penindasan habuk, spare shoe set)
• HeavyDuty 12Stamp Mill: $480,000 $550,000 (includes PLC, pemantauan jarak jauh, spare die set)

Ciri Pilihan:

• Automated Feed System: $28,000 (belt feeder with load cell control)
• Sound Enclosure Package: $15,000 (reduces noise to 82 db(A))
• Kit Alat Ganti (2year supply): $45,000 (kasut, mati, bushings, skrin)

Pakej Perkhidmatan:

• Pakej Pentauliahan: $12,000 (2week onsite technician, training for 4 pengendali)
• Kontrak Penyelenggaraan Tahunan: $18,000/tahun (diagnostik jauh, penghantaran bahagian keutamaan, 2 site visits)

Pilihan Pembiayaan:

• LeasetoOwn: 36month term, 8% APR, 10% residual value
• TradeIn Program: 15% discount on new unit when trading in any functional stamp mill (any brand)

8. Soalan Lazim

Q: Can the Export Stamp Mill handle ores with high clay content?
A: The mill is designed for hardrock ores. For ores with >15% tanah liat, we recommend a prewashing drum or scrubber to prevent binding in the mortar box. Data lapangan menunjukkan a 12% reduction in throughput with clay content above 20%.

Q: What is the typical lead time for export orders?
A: Standard lead time is 1214 minggu dari pengesahan pesanan. This includes fabrication, perhimpunan, and factory testing. Expedited orders (8 minggu) are available at a 5% surcharge.

Q: How does the stamp mill compare to a ball mill for gold recovery?
A: Stamp mills produce a coarser, more uniform particle size with less slimes, which is advantageous for gravity recovery. Ball mills are better for fine grinding (<75μm) but generate 1520% more slimes. For freemilling gold, stamp mills typically achieve 37% higher recovery in gravity circuits.

Q: What is the expected lifespan of the mortar box?
A: Under normal operating conditions (450500 operating hours per month), the mortar box lasts 8,00010,000 jam. The highchrome alloy construction resists cracking and deformation. Replacement cost is approximately $22,000.

Q: Do you provide training for local operators?
A: ya. Our commissioning package includes a 5day onsite training program covering operation, penyelenggaraan, dan penyelesaian masalah. We also provide a 200page technical manual and video guides in English, Spanish, and French.

Q: What are the shipping requirements for export?
A: The mill ships in 23 bekas (20foot or 40foot opentop). Total shipping weight is 2832 tan metrik. We provide a detailed packing list and lifting plan for remote offloading. No special permits are required for standard export.

Q: Is financing available for international buyers?
A: ya. We offer financing through our partner export credit agency for qualified buyers in 40+ countries. Minimum down payment is 20%. Terms range from 24 ke 60 bulan. A credit application and 3 years of financial statements are required.