United States Tilden beneficiation plant is the use of selective flocculation cationic reverse flotation processing particles disseminated low-grade iron ore. The main iron-bearing minerals in the ore are illusory hematite and hematite. The iron mineral inlay has an average particle size of 0.01 to 0.025 mm. In addition to quartz , gangue minerals also contain small amounts of calcium, magnesium and aluminum minerals. The ore contains 35% iron and 45% silicon. Flotation process technology of iron ore beneficiation equipment. Water glass and sodium hydroxide are the dispersing agent of the slime and the pH value of the pulp is adjusted to 10-11. Corn starch is added, and the stirred pulp enters the thickener for selective flocculation. mud. In the thickener, the quartz slurry is discharged by overflow, and the sand of the thickener is flocculated concentrate. When the thickener is supplied with iron containing 35% to 38%, the discharged overflow contains 12% to 14% of iron, the grit contains 44% of iron, and the concentration is 45% to 60%. The grit is then passed through the slurry distributor. The tank was stirred, then corn starch was added as an inhibitor, and the amine floc was used for reverse flotation of gangue minerals. The final concentrate contains 65% iron, contains 5% quartz, and the iron recovery rate is about 70%. The plant uses selective flocculation and reverse flotation to treat fine-grained hematite. The main features are: 1) Fine grinding: adopting the two-stage closed grinding process of “self-grinding-fine crushing-gravel grindingâ€, using large-scale wet self-grinding machine (φ8.2m×4.4m) and large gravel mill (φ4.7m×9. 1m) matching purchase. Balancing the two-stage load by 1:2, coupled with the application of the cyclone grading, enables the industrial production to meet the requirements of fine grinding (80% less than 0.025 mm), creating conditions for selective flocculation flotation. 2) Flocculation and desliming: The dispersant is added to the mill, which saves auxiliary equipment and strengthens the dispersion operation but does not affect the grinding classification. 3) Reverse flotation: using amine as a collector, after high-concentration slurry adjustment, only concentrate once to obtain concentrate. The iron minerals in the foam are reduced by increasing the number of sweeps. 4) Backwater utilization: Industrially successful application of flocculant and lime to treat backwater separately. Simple and easy. The water reuse rate is up to 95%, reducing drug consumption and cost, and reducing environmental pollution. 5) Concentrate dehydration: Because the fine grain size is not easy to dehydrate, a three-stage dehydration process is adopted. Flocculation is to first cause the fine iron mineral to form a flocculation group to sink, and then remove the partially dispersed suspended gangue slime by concentration. This process can be carried out several times. Iron concentrates are obtained, but such coarse concentrates often fail to meet quality requirements, and further reverse flotation is required to improve the grade of iron concentrates. In the reverse flotation, the inhibitor of iron mineral is first added to the slurry, and then the reverse flotation is carried out with a cationic collector or an anionic collector. When reverse flotation is carried out with an anionic collector, Ca2+ is added as an activator for quartz, and the pH of the slurry is adjusted to about 11. After reverse flotation, the product in the tank is iron concentrate and the foam product is tailings. Chlorine Test Strips,Good Chlorine Test Strips,Sanitizer Chlorine Test Paper,Custom Chlorine Test Kits Jilin Test Bio-Electron Co., Ltd , https://www.tst-check.com
The national standard is, factory water ≥0.3ppm, pipe network terminal water ≥0.05ppm;
The residual chlorine value is too high, and the stench of chlorine in the water will be very strong, which will not only stimulate the human respiratory system and eyes, but also may lead to allergies in many people.
The residual chlorine value is too low, the disinfection effect cannot be guaranteed, and the bacteria content in the water exceeds the standard, endangering human health.
Algae can also multiply rapidly, turning the water green and muddy, and accelerating pollution.
State regulations, swimming pool residual chlorine content in 0.3-0.5mg/L.