Determination of the dissociation degree of elite minerals

The process product is first delimed, dried, and sieved into several grades typically used for beneficiation screening. Weigh the grades of each grade and calculate the yield of each grade. Then, 2~58 samples were uniformly taken from each sieve level, and sent to the laboratory for analysis of the content of each relevant element.

The ore sample used in the stereomicroscope method is generally available for observation after the above treatment. The mineral sample used for the observation of the spectroscopic microscope needs to be further processed on the basis of the above treatment. The method is: uniformly picking up a part of each sieve grade sample (generally not less than 5 ~ 10g, using a binder agglomerate to make a small nugget of about 2cm × 2cm × 1cm. Then grinding it for microscopic observation Light sheet or sheet.

If it is a pre-enrichment method, the sample is subjected to the step of enriching the target mineral after de-mudging, drying, and sieving. Commonly used separation and enrichment methods are heavy liquid and electrical and magnetic separation. Since the amount of sample for observation is generally only a few grams or tens of grams, the separation and enrichment effect is good as long as the operation is carefully and carefully performed. The samples of each sieve grade are processed into the corresponding "concentrate" and "tailings" by separation and enrichment. It is then sent to the laboratory to analyze the useful elemental content of the “raw ore” and “tailings” at each level of the sample. As for the "concentrate" of each level, the same method is used to form a mine, and then it is ground into a light sheet or a sheet for observation under the microscope.

(two) determination

After the samples are prepared, they can be counted and observed under the microscope. Of course, before implementing statistics, the observer must first make a correct judgment on the mineral to be observed under the microscope. The mineral type is judged incorrectly, and all subsequent statistical work loses its value. Therefore, the observer of the microscopic identification of the mineral must be done carefully.

There are many statistical methods for obtaining the dissociation degree of the monomer. Among them, the "over-rule method" and the "number-particle method" are more practical and statistically accurate. The over-foot method is to place an eyepiece micrometer in the field of view, screw the mechanical table on the stage, and pass all the mineral particles one by one through the eyepiece to measure the total length of all the monomers and all kinds of continuum. The total length of the mineral in the purpose. The monomer dissociation degree of the target mineral can be obtained by using the total length of the monomer particles as the total length of the mineral (the total length of the monomer plus the total length of the mineral in the continuum). When using the particle method, before the formal observation, the continuum should be divided into several types (the proportional number represents the volume relative value of the target mineral in a continuous granule) and then one field of view followed by one field of view. The number of monomers in the number of minerals and the number of particles of various types of continuum were not repeatedly checked and recorded item by item in the format of Table 2-11-9.

The infected body in the table refers to those continuous bodies in which the volume of the target mineral in the particles is less than 1/16. This type of continuum has little effect on the calculation of monomer dissociation, but it is very useful when analyzing the problems in the process product. Therefore, it is necessary to distinguish them and record them separately when observing. The gangue refers to all the unwanted minerals in the product. When the density of these useless minerals is not much different, it can be classified as gangue. If the density is very different and the content is similar, the gangue should be divided into several categories and then counted and recorded separately.

[III] Calculation of dissociation degree of granular monomer

For the direct observation method in the stereomicroscopy method and the reflective microscopy method, after recording the observation results according to the above table, calculate the monomer dissociation degree of each particle size of the sample by the following formula (for example, the level of ten 100 mesh)

Total number of observed particles:

The pre-enrichment method in the spectroscopic microscopy method, after separation and enrichment, can only obtain the monomer dissociation degree L(e) of the granular "concentrate" by observation and recording results. ), the monomer dissociation degree of the entire granular grade mineral is calculated by the following formula:

The premise of the above formula is that in the separated "tailings", the target minerals are all in a continuous state.

(4) Calculation of the proportion of the target mineral monomer in the process product

The process products have been observed, calculated, and sorted out, and the mineral content and monomer dissociation degree of each grain grade China are completely clear. However, from the actual requirements of mineral processing, it is necessary to understand not only the degree of monomer dissociation of minerals in a certain size, but also the dissociation of minerals in the whole sample. Therefore, based on the above results, the monomer occupancy rate of the mineral in the product, that is, the monomer dissociation degree of the mineral in a product, is further calculated. This sorting and calculation work can be carried out item by item according to the format of Table 2-11 - 10.

The gangue content, gangue distribution rate, gangue monomer occupancy rate and the corresponding meanings and calculation methods of the target element (mineral) are generally consistent. See the above description.

Note: The sieve grade is selected according to the product size and the actual production condition of the ore dressing plant.

The ratio of the product amount of each level to the total sample after the screening one by one;

Analyze the analytical analysis of the elements in the product.

The target mineral content - the ratio of the mineral content enriched to the total weight of the product.

The gangue mineral content - the ratio of the mineral content to the total weight required for the product. The calculation method and the target mineral content are the same.

The statistical grade is the content of the target element converted according to the results of the useful mineral content of the microscope observation.

The target mineral monomer solution height is calculated according to the results obtained by microscopic observation, and the calculated monomer dissociation degree of the target mineral in each particle size is calculated.

The dissociation degree of the gangue mineral monomer-based on the microscopic observation results, the monomer dissociation degree of the gangue minerals in each of the granular grades was calculated.

The content of the target element---the amount of the target element in the whole sample, which is allocated in a certain level. The sum of the content of each level element is the grade value of the element in the whole sample.

Distribution rate of the target element - the proportion of the elements in the whole sample in each size.

The target mineral monomer occupancy rate - the distribution value of the mineral monomer amount in each particle size. The sum of the fractions of each fraction is the monomer dissociation degree of the target mineral in the whole sample.