The processing capacity of mineral processing is the quantity of raw ore processed by the plant, which is subject to the entry of a ball mill . The working time of the plant is also calculated. Includes pre-selected waste rock volume, qualified ore volume, and mud removal overflow. It is the main body of the mining volume in the stope. The mining loss rate can be calculated from the actual amount and the geological reserves within the mining range. The selection of the plant, the number of people, and the working time can be calculated as the ore recovery rate and the labor productivity of the selected plant. Matter of scale mining, metal balance, technical specification and the contract settlement, mine production and prices, closely related to benefits, provide the basis for stope to the ore processing plant and processing plant yard to dry tailings transportation costs calculated. So its measurement is extremely important. The belt scraping method is the most primitive traditional measuring method. Cut the bamboo poles that are half a meter long and use them as a ruler. After half an hour, scrape off all the materials containing muddy water, such as bamboo poles, on the belt, and then install them in containers such as tweezers. Weigh the record and then measure the moisture to determine the water content coefficient. In order to ensure the accuracy of the measurement, it is possible to scrape 2 to 3 segments at different points at a time, and weigh the arithmetic mean. Shutdown when scraping off, determined by belt speed under convenient and safe conditions. The hourly ore amount (ton/hour) is equal to 3.6 times the average amount of mined material (kg) and the ore water content coefficient, belt speed (m/s), divided by the length of the bamboo pole (m). Assume that the bamboo raft is 0.5 meters long, and the amount of minerals equal to the length of the bamboo raft is scraped at two different points on the belt for half an hour, respectively, 6.8 kg and 7.2 kg. When the moisture content is 5%, the water content coefficient is 0.95. For 1.0 m / s, the hourly supply of the belt to the mill is [3.6 × (6.8 + 7.2) / 2 × 0.95 × 1.0] ÷ 0.5 = 47.88 tons, the operating rate is 95%, and the daily processing capacity is 1091.66 tons. The nuclear scale is a non-contact measurement that can adapt to harsh environmental conditions, is easy to install, and has complete test data. A gold mining enterprise in southern Shaanxi, the transportation of the ore silo ore to a ball mill is completed by pendulum feeding machine and belt. The nuclear scale is used to measure the amount of processing, because the oxidized ore contains more mud, and the powder ore warehouse The mine is not smooth, with detonator bombing, high pressure water rushing, the mill is feeding the mine belt with frequent minerals, water, pulp, mud, sometimes "hula", the people underneath are poured into "falling chicken", and the nuclear scale screen is hidden At the time, the fault was frequent and there was nothing to do. I had to dismantle it and change it to a belt scraping method. The actual swing of the BGJ400×400 pendulum feeder is 50 times/min (note that the signage is sometimes different from the actual one). It can be seen that the pendulum is 1.2 seconds per time and the belt speed is 1.0 m/s, which is equivalent to a pendulum. The length of the secondary mine scraped on the belt is 1.2 meters. The bamboo pole is used as a ruler, the measuring ruler scrapes it, the weighing is a kilogram, and the second scraping weight is b kilogram. It can be seen that the scraping amount is 1.5 in 1 hour. a+b) tons. A gold mining enterprise in southeast Gansu also used nuclear scales to measure the processing capacity of mineral processing. Basically, the main ore body ore was used to measure the nuclear scale after the scale was measured, and the other pits were used with the coefficient. As a result, the monthly ore balance error was very large. The amount of minerals, the last three days of the "mineralization daily" is pending, the actual processing of the ore is the measurement of the scale, the daily processing capacity is adjusted one by one, the coefficient is 0.7-0.8, indicating that the daily report is more than the actual measured ore, for the usual mineral processing production The technical management was misleading, combined with the influence of moisture and screw-like iron parts, and the harm of nuclear radiation sources was later cancelled. The belt scale is developed from a mechanical roller into an electronic type. The former consists of a gravity transmission system, a roller counter and a speed disk. The roller rotates from the center of the speed disk to zero, the counter does not accumulate until the gravity becomes large, and the total weight of the material is accumulated by the counter. The latter consists of a steel mechanical scale, a speed sensor, a high-precision load cell, and an electronic belt scale control display instrument. When weighing, the load-bearing device transmits the gravity of the material on the belt to the load cell, and converts it into a digital quantity A after being amplified; after the material speed is input to the speed sensor, the number of pulses is output B; A, B are sent to the calculator after calculation , the total weight of the material is obtained cumulatively. Of course, the electronic belt scale is highly accurate, easy to proofread, operational management and reading. No matter what kind of scale, "there is no change from the ancestors", the structural principles of scales, scales, scale hooks, weighing pans, rope buttons and so on are no different from the original scales. As far as the electronic belt scale is concerned, when there are foreign objects or too much dust on the scale frame, and the zero point is not corrected in time, the measurement error becomes larger, as the weight of the scale weighs and the scale zero point does not change, the reading result of the scale Larger than the actual. A mining enterprise found that the error of the processing volume of the electronic belt scale measuring and selecting plant was as high as +6%, that is, the monthly processing of 12,000 tons of ore, and the "mineraling daily report" was 720 tons more than the actual one. Therefore, the belt scale zero point and interval were repeated. After checking and confirming the error, the manufacturer of the belt scale was invited to come to the site for guidance. The result was that the TGT-500A scale was in disrepair and the deviation was large when it was used. It was changed to 25 kg electronic platform scale and 50 kg platform scale to weigh the material sand at the same time. Then placed on the belt scale after the zero point correction, the belt scale was calibrated by a steel mechanical scale, and the error was 0.2%. Therefore, when the belt scale measurement error is large, in addition to checking the scale itself, it is also necessary to consider the series of work before and after the school scale, including the scales and platform scales used for the school scales, and the acts of artificially falsifying on the scales, according to the national measurement. The law is brought to justice. The accuracy of the belt scale measuring ore processing volume provides reliable first-hand basic data for the determination of mining scale, metal balance, process index and contract settlement, as well as the production efficiency and calculation of transportation costs. Dump trucks come in various sizes, ranging from small ones used for residential construction projects to massive off-road models used in mining and quarrying operations. They are typically equipped with large wheels or tracks to handle rough terrains and carry heavy loads. dump trucks ,Dumper Truck china , Mini Dump truck FengXian Enland International Trading Co.,LTD , https://www.jsenland.com
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