Testing items and testing methods for mineral processing
There are many items to be tested during the mineral processing process, and the detection methods are not completely consistent. I. Detection of heavy ore and concentrate The ore processing and concentrate are quantitative indicators of the ore dressing plant and require accurate measurement. There are many measurement methods, which are mainly determined according to the ore particle size and transportation mode. Most concentrators have installed electronic belts on the ore belt of the grinding machine, or the electronic belt is called an automatic instructor, and the error is required to be no more than 2% . Therefore, the belt scale should be checked frequently. The small concentrator mostly scrapes a certain length of ore on the ore belt of the grinding machine, and weighs the belt and calculates the amount of the ore after the weighing. This method is large and inconvenient. Concentrate metering is to install the automatic weighing on the unloading belt of the filter, or to install the automatic measuring device in the unloading belt of the concentrate belt for metering. If the factory concentrate is transported by car or train, it can be measured by the ground balance or railway scale. . Second, the determination of pulp concentration The concentration of pulp is one of the important factors affecting the beneficiation index. It affects the productivity of the mill, the efficiency of the grinding technology, the classification efficiency, the separation of the particle size; the flotation speed, the flotation time and the dosage of the agent during the flotation process; It affects the productivity of thickeners and filters. There are many methods for determining the concentration of pulp. At present, most of the concentrating plants use concentration pots, which will gradually be replaced by automatic testing instruments. The formula for determining the concentration of pulp using a concentration pot is as follows:     δ - the density of ore, g / cm 3 ;     △ - the density of the pulp, g / cm 3 . The density of the ore is known. The tare weight and volume of the concentration pot can be measured in advance. When the concentration of the pot is filled with the slurry, the density of the slurry can be calculated. Substituting the formula can determine the concentration of the slurry. In the actual application, a table can be made by using the above formula. The method is to take the ore density δ of the factory as a known number, and then artificially give a pulp density and calculate the corresponding pulp concentration P. If a lot of pulp density values ​​with small spacing are continuously given, a series of corresponding pulp concentrations can be calculated, and the corresponding values ​​are listed as a table, which becomes the concentration table used by the factory. With this watch, as long as the weight of the pot filled with the slurry is weighed, the corresponding pulp concentration can be found on the meter. Third, the determination of grinding fineness Grinding fineness is expressed as a percentage ratio of -200 mesh content. The determined fineness of grinding is the best fineness corresponding to the best selection index through experimental research. In production, the grinding operator must be strictly controlled and must be continuously measured. There are many methods for determination, which are generally carried out in a graded overflow sampling sieve. Only one rapid screening method is introduced here: Apply a certain volume of concentration pot ( should be It should be noted that this test method assumes that the density of the product on the sieve and the product under the sieve are equal. If their density differs greatly, the detection result is an approximation. In the actual production of the plant, in addition to rapid screening, it is necessary to take a sieve sample for the graded overflow, and then shrink it out after drying. Fourth, the chemical composition of the inspection The content of useful components and impurities in the ore and other products in the concentrator are determined by chemical analysis. The raw, fine and tailings in the production of the plant are sampled and analyzed by class. Sometimes for a need, you can take a quick analysis for quick analysis. The test results can be obtained within 1 to 2 hours, which is convenient for solving the problem in time. V. Determination of the amount of administration In the flotation plant, heap leaching plant and cyanide plant, it is necessary to check the pharmaceutical system and the dosage of each dosing point. After the ore dressing agent is prepared in the dispensing room, it is sent to the drug delivery machine and enters the various dosing points of the flotation along the catheter. The measuring cup manually measures the flow rate of the medicament, and then calculates the dosage of the medicament as follows.        q - the flow rate of the drug added per minute, ml / min;        c -% drug concentration;       Δ——the density of the drug when the concentration is c , g / ml;        Q - the number of tons of raw ore processed per hour. Some concentrators use a numerically controlled drug delivery machine to accurately and accurately calculate the amount of drug used. There are many items to be tested in the production of the concentrator, such as the determination of the pH of the pulp, the determination of the moisture, the determination of the temperature, the determination of the aeration, the determination of the vacuum and the strength of the magnetic field, etc., which are not introduced here, if necessary, reference book. Water Tank Truck is widely used for water transportation, sprinkling and irrigation,water tank truck also could be used to deliver potable drinking water.the tank materials available in high strength steel, stainless steel and aluminum. Water Tank Truck Water Tanker Truck,Isuzu Water Bowser Truck,Edible Water Tanker Truck,Eatable Water Tank Truck Hubei Jiangnan Special Automobile Co., Ltd , https://www.cn-firetrucks.com
δ( △ - 1 )
P = —————— × 100%
△( δ- 1 )
Where: P - pulp concentration, solid content weight percentage, % ;
q - a - b
X = ————— × 100%
q 1 - a - b
q × c × δ × 60
A = ————————g/ton mine Q
In the formula: Â A - the dosage of raw materials per ton of raw ore, g / ton of ore;
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