JinChan Consumption: Selecting the Dosage for a Specific Ore

What the official manufacturer says

The working concentration of the solution and the consumption of the reagent per ton of ore are not the same thing.

Concentration cannot be converted into kg/t of ore without data on the liquid phase, its volume, process conditions and actual reagent consumption.

In the Dosage Calculation section, the manufacturer indicates that when initially selecting a consumption, the previously used NaCN consumption can be taken into account, but recommends conducting a beneficiation test and determining the optimal conditions by testing.

The manufacturer directly requires that the conditions be adjusted depending on the characteristics of the ore, including gold content and components affecting the process.

Why can't you just write "1 kg per ton"

The amount of reagent that had to be added during the entire leaching cycle depends not only on the initially specified concentration. It is necessary to take into account the actually maintained concentration in the liquid phase and its change during the process.

The official methodology involves measuring the current concentration of JinChan and making adjustments relative to the established target value.

Consumption is the result of a particular process, and not just the initial figure when loading the reagent.

What does a comparative study of two ores show?

The published example is not a standard

Yılmaz and Sayın tested two ores of different composition and mineralogical characteristics. For the selected conditions of 40% solid and 300 mg/l JinChan the following results were published:

Results from the specific laboratory study by Yılmaz & Sayın; they are not recommended JinChan parameters for other ores.

Even at the same target concentration, two different ores showed different actual reagent consumption and different recovery results.

Why an increase in concentration does not guarantee an increase in recovery

The Çukuralan study tested concentrations of 300, 400 and 500 mg/L in one of the conditions studied. The authors note that an increase in concentration in the studied range did not lead to a corresponding change in extraction by the eighth hour of the experiment.

In this particular experiment, increasing the concentration of JinChan did not provide an additional final effect. This does not mean that concentration never affects other ores.

Adding more reagent should be an experimental variable and not an automatic response to an unsatisfactory result.

Why can't published values ​​be copied to another ore?

In independent work by Guo et al., for a specific Carlin-type concentrate, the researchers obtained their optimal conditions at a JinChan concentration of 1,0 g/l.

1,0 g/L is a parameter of a specific published experiment and is not an instruction or recommended concentration of JinChan for use on other ores.

The meaning shows why the published conditions must be read in conjunction with the material examined and the experimental conditions, and not transferred to another object.

What needs to be determined by testing

How to compare multiple dosages

To determine the effect of concentration, it is necessary to carry out comparable tests on identically prepared material. The remaining essential conditions are recorded as comparable as the research program allows.

Specific concentration levels are determined by the test program.

Target concentration and actual concentration

At the beginning of the experiment, you can set a certain amount of the reagent, but for a correct assessment of the process it is important to know not only how much JinChan was added, but also what concentration was actually maintained in the solution.

The official instructions of Guangxi Senhe contain a separate titrimetric method for determining the concentration of JinChan.

The manufacturer provides analytical monitoring of JinChan concentration; Therefore, industrial control should not be based only on the calculated mass of the applied reagent.

Corrective addition of reagent

The official instructions describe the principle of calculating the additional dose through the difference between the target and measured concentration, taking into account the volume of the solution.

After determining the target conditions, the corrective application is calculated taking into account the actually measured concentration and amount of solution in the system.

The manufacturer's numerical example is not reproduced here: the English version of the page contains an incorrectly translated unit of volume. Therefore, the article retains only the confirmed principle without its own formula and unconfirmed units.

Is it possible to focus on NaCN consumption?

The manufacturer writes that JinChan consumption can refer to the dosage of sodium cyanide, after which it immediately recommends a beneficiation test.

The historical NaCN conditions can be used as an input when planning a test, but official instructions do not provide a basis for considering the mass consumptions of the two reagents to be universally equal for any ore.

The universal conversion factor for NaCN in JinChan does not apply.

How to calculate actual consumption after the test

For a closed laboratory test, the total actually applied mass of JinChan and the mass of the studied material are recorded. For processes with solution circulation, it is additionally necessary to take into account the return of the solution and the residual concentration of the reagent.

If additional applications were made during the test, a simple "initial load/ton" figure does not reflect the entire cycle.

The actual consumption should reflect the entire recorded reagent consumption for the cycle in question.

What consumption should be indicated to the client before testing?

Before testing a specific ore, only reference data from the manufacturer and the results of published studies can be provided, with a mandatory indication of their conditions. The calculation of working consumption for a specific object must be confirmed by testwork.