A gold mine CIP (carbon-in-pulp) plant with a daily processing capacity of 5,000 metric tons has joined the ranks of large-scale industrial processing plants.

This scale implies a significant leap in equipment specifications; a single ball mill may reach a diameter of Φ3,600 or more, and the SABC process—combining semi-autogenous grinding with ball milling—may even be considered. The number and volume of leaching and adsorption tanks are substantial, and the complexity of piping and automated control systems increases exponentially;the proportion of investment in civil engineering, electrical systems, and tailings facilities has risen significantly; any error in equipment selection or poor coordination at any stage could result in losses amounting to tens of millions.For projects of this magnitude, the EPC turnkey model is virtually the only option that allows mine owners to sleep soundly, as a break in the chain of responsibility would result in losses incomparable to those of a small plant.

Based on a daily processing capacity of 5,000 metric tons, this article systematically analyzes the process configuration logic, key equipment selection considerations, and the scope of delivery for an EPC turnkey CIP carbon-in-pulp plant, as well as the most common pitfalls at this scale.

I. What Does 5,000 Metric Tons Per Day Mean? Let\'s Run Some Numbers

Before discussing equipment, let\'s first quantify the concept of scale.

Note that this figure covers only the controllable costs of equipment and civil engineering; it excludes external supporting infrastructure such as land acquisition, tailings ponds, environmental protection facilities, power capacity expansion, and water supply projects. Tailings ponds often occupy an area larger than the plant site itself, depending on the terrain and the plant\'s design life.

In terms of equipment capacity: A daily processing capacity of 5,000 metric tons, calculated based on 24-hour continuous operation, equates to an hourly processing capacity of approximately 208 metric tons.If the crushing stage is designed for a 10-hour work shift, the crushing capacity must reach 500–600 metric tons per hour or higher; in the grinding stage, ball mills are typically sized at Φ3200×5400 or Φ3600×6000, depending on the ore hardness and required grind size.The total effective volume of the leaching and adsorption tank bank is calculated by multiplying the processing capacity by the leaching time and dividing by the effective volume. If the leaching time is 36 hours and the slurry concentration is 40%, the total volume required is on the order of several thousand cubic meters, typically requiring 8–12 large dual-impeller carbon-in-leach (CIL) tanks connected in series.

Investment costs vary depending on ore properties: for facilities of the same scale, investment differences can be enormous depending on the type of ore. For difficult-to-process gold ores containing arsenic and carbon, the total investment may be two to three times that of easily processable ores. The equipment configuration and process complexity for a 5,000-metric-ton-per-day facility processing difficult-to-process ores are on a completely different scale compared to those for easily processable oxidized ores.

Conclusion: There is no standard checklist for configuring a 5,000 metric tons per day CIP processing plant. Every variable—including ore properties, grinding fineness, leaching time, gold recovery efficiency, and site conditions—will affect the equipment models and quantities required. The configuration below serves as a typical framework; the actual plan must be based on mineral processing test reports and customized design.

II. Complete Process Stages and Equipment Configuration Framework for a 5,000-metric-ton-per-day CIP Plant

1. Crushing and Screening Section

The objective is to crush the raw ore to the feed size required for grinding, typically 12 to 15 millimeters or less, following the principle of “more crushing, less grinding.”

Core equipment includes large jaw crushers for primary crushing, hydraulic cone crushers for secondary and tertiary crushing (single-cylinder or multi-cylinder), circular vibrating screens or linear vibrating screens (screening area typically 20 square meters or more),heavy-duty feeders, and wide-belt conveyors (belt width 800–1,000 millimeters).

Key configuration points: For a capacity of 5,000 metric tons per day, the crushing stage typically employs a two-stage closed-circuit or three-stage closed-circuit process.Equipment selection must take into account ore hardness, moisture content, and maximum feed size. The choice of cone crusher chamber type (coarse, medium, or fine) directly affects product particle size and subsequent grinding energy consumption.

2. Grinding and Classification Stage

The objective is to grind the ore to the fineness required for the liberation of free gold, typically with 75% to 90% of the material below -200 mesh, subject to test results.

Core equipment includes large ball mills (overflow or grate type, Φ3200 or larger), hydrocyclone banks (which replace traditional spiral classifiers and offer higher classification efficiency), large slurry pumps, and feeders.

Key Configuration Points: For a 5,000 metric tons per day operation, the grinding section is the primary driver of energy consumption and capital investment. If the ore has high hardness, the SABC process—combining semi-autogenous grinding with ball milling—may be considered. Although this increases capital investment, it simplifies the crushing process and reduces the load on the fine crushing stage.The classification efficiency and underflow concentration control of the hydrocyclone bank directly affect the fineness of the grinding product and leaching efficiency; therefore, it must be precisely matched to the ball mill.

3. Leaching Section: CIP Leaching

is to dissolve gold into gold cyanide complexes using a sodium cyanide solution under alkaline conditions (pH 10 to 11).

Core equipment includes large leaching tanks (equipped with high-efficiency aeration and agitation; typically 4–8 tanks connected in series, with the effective volume of a single tank determined by dividing the total volume by the number of tanks), sodium cyanide and lime preparation and dosing systems, large blowers, and online monitoring instruments for pH and cyanide concentration.

Key configuration points: Leaching time is typically 24–48 hours, subject to experimental verification. The agitation intensity, aeration rate, and pulp concentration (typically 35%–45%) directly affect the gold dissolution rate.For a 5,000-metric-ton-per-day operation, the accuracy and reliability of the chemical dosing system are critical; even minor deviations in chemical consumption can result in significant costs on an annual basis.

4. Adsorption Stage: The objective of CIP adsorption

is for the slurry to enter the adsorption tank, where it comes into countercurrent contact with activated carbon, causing the gold to be adsorbed.

Core equipment includes large, high-efficiency dual-impeller carbon-in-leach tanks (adsorption tanks, typically 4–6 sections in series, sized to match the leaching tanks), a carbon-retaining screen (with mesh size precisely matched to the activated carbon particle size, typically 0.8–1.0 millimeters), a carbon-lifting pump or air lifter, activated carbon (coconut shell carbon, particle size 6–12 mesh or 8–16 mesh), and a carbon regeneration system(rotary kiln regeneration or acid washing regeneration).

Key configuration points: The CIP process follows a “leach-then-adsorb” sequence, with the leaching tank and adsorption tank located separately. The number of adsorption stages affects the recovery rate; more stages result in higher recovery but also increase capital investment. The activated carbon concentration is typically 10–25 grams per liter, and the carbon extraction rate is designed according to countercurrent adsorption requirements.The carbon retention screen is critical for preventing carbon loss; at a scale of 5,000 metric tons per day, any carbon loss would result in significant financial losses.

5. Desorption, Electrolysis, and Smelting Section

The objective is to desorb the gold from the gold-loaded carbon, electrolytically produce gold slime, and smelt it into refined gold.

Core equipment includes desorption and electrolysis units (selected based on the daily output of gold-loaded carbon; multiple units in parallel or a single large-scale batch unit may be required), a gold smelting furnace, and carbon regeneration or acid washing equipment.

Key Configuration Points: At a scale of 5,000 metric tons per day, the daily output of gold-loaded carbon is substantial; the batch processing capacity of the desorption and electrolysis equipment must be precisely matched to the desorption cycle, otherwise gold-loaded carbon will accumulate or equipment will remain idle. Desorption and electrolysis efficiency targets must be clearly specified in the contract.

6. Tail Liquids and Environmental Protection Section

The objective is to treat cyanide-containing tailings liquid to meet regulatory standards and to ensure the safe stockpiling or dry discharge of tailings.

Core equipment includes large, high-efficiency thickeners (GX-type or deep-cone thickeners), large filter presses (for tailings dry discharge), cyanide removal or neutralization treatment systems (alkaline chlorination or hydrogen peroxide methods, designed based on treatment capacity), emergency ponds, and accident ponds.

Key Configuration Points: With a tailings volume of 5,000 metric tons per day, the choice between dry tailings disposal and compliant discharge directly impacts environmental investment and operating costs. The treatment capacity of the cyanide-containing tailings treatment system must align with the production schedule and must not become a bottleneck.

7. Auxiliary and Automation Section

Core equipment includes large slurry pumps, carbon recovery pumps, water pumps, agitation tanks, electrical control systems (MCC, PLC, central control room), and online monitoring systems (pH, cyanide concentration, flow rate, liquid level, density).

Key Configuration Points: For a 5,000-metric-ton-per-day facility, the level of automation directly impacts production stability and labor costs. We recommend implementing at least a medium level of automation—combining PLC control with central control room operation and online monitoring of key parameters. While this increases investment by approximately 15%–20%, it significantly reduces fluctuations in performance indicators caused by human operational errors.

III. The Unique Value of an EPC Turnkey Solution at This Scale

For a 5,000 metric tons per day project, the value of an EPC turnkey solution lies not in convenience, but in risk control.

IV. Five Common Misconceptions Regarding the Configuration of a 5,000-Metric-Ton-Per-Day CIP Processing Plant

• Misconception 1: Quoting based on standard 5,000 metric tons per day specifications without conducting pilot tests. Even for the same 5,000 metric tons per day capacity, the equipment configuration, process complexity, and investment scale for easily processable oxidized ore versus difficult-to-process arsenic- and carbon-bearing ore can differ by two to three times.Quoting a price without a pilot test report is either a half-hearted effort or a trap.
• Misconception 2: “The grinding stage doesn\'t need to be precise.”A 5-percentage-point difference in grinding fineness can result in a several-point difference in leaching efficiency, and grinding accounts for the lion\'s share of a processing plant\'s total energy consumption. Under-sizing ball mills creates a bottleneck in capacity, while over-sizing wastes investment and electricity. Calculations must be precise, based on ore hardness and the grinding fineness determined by testing.
• Misconception 3: Mismatched volumes of leaching and adsorption tanks. In the CIP process, leaching precedes adsorption; insufficient leaching time results in incomplete gold dissolution, while an inadequate number of adsorption stages leads to low recovery rates. For a 5,000-metric-ton-per-day operation, even a slight deviation in tank group design translates into tangible financial losses when scaled up to annual production.
• Misconception 4: Neglecting the carbon separation screens and carbon recovery systems. In large plants, carbon loss can result in daily losses equivalent to a month\'s worth of gold-laden carbon at a small plant. Screen mesh size, screen area, and carbon recovery capacity must be precisely designed according to the plant\'s scale—approximations are unacceptable.
• Misconception 5: Putting environmental protection and tailings facilities on the back burner until after production begins. For a 5,000 metric tons per day operation, tailings volume and cyanide-containing wastewater treatment are hard constraints; if environmental protection facilities are inadequate, the plant faces the risk of shutdown immediately upon commissioning. The EPC solution must incorporate dry tailings disposal or compliant treatment into the overall design—this cannot be left to be addressed later.

V. OreSolution\'s 5,000 Metric Tons Per Day Gold Mine CIP Processing Plant EPC Turnkey Solution

OreSolution specializes in mining equipment and mineral processing solutions, operating three modern manufacturing bases (Shahe Industrial Park in Zhanggong District, Ganzhou, Jiangxi; Guzhang Industrial Park in Shicheng County, Ganzhou, Jiangxi; and Weifang Heavy Industry Park in Shandong),with 20 years of experience in mining equipment manufacturing and solution integration, and products exported to more than 80 countries and regions worldwide. For a 5,000 metric tons per day CIP carbon-in-pulp processing plant, we provide a comprehensive EPC turnkey service framework.

Regarding the estimated timeline, for a 5,000-metric-ton-per-day project, the overall cycle from ore sample testing to production commencement is typically 10–15 months:

• Mineral processing trials: 30–45 days
• Engineering design: approximately 45–60 days
• Equipment manufacturing: approximately 90–120 days
• Logistics and transportation depend on the destination
• Installation and commissioning: 90–180 days

For large-scale projects, it is recommended to allow for a more generous buffer period.

VI. Frequently Asked Questions

VII. Entrust the certainty of a 5,000-metric-ton-per-day operation to a team accountable for results