In order to better ensure the best properties of the drug, the location and method of peristaltic pump dosing machine delivery should be effectively selected based on the characteristics of the iron ore, drug and technology.
(1) Dosing location. The choice of dosing location is related to the use and characteristics of the drug. Usually, the pH adjuster is put first and can be added to the cement ball mill. It can not only make the retarder and collector at the pH value It can be fully exerted in a suitable coal slurry, and at the same time, it can solve certain "unavoidable ions" that are harmful to flotation agents. The retarder needs to be added before the collector, and is usually added to the cement ball mill to allow the retarder to It can form a fresh surface layer with inhibited minerals as early as possible. Active agents are often added to the mixing tank and mixed with the coal slurry for a while to promote and activate the minerals. Collecting agents and foaming agents are added In the mixing tank or flotation machine, insoluble collectors are often added to the grinding mill, in order to better promote their dispersion and improve the effectiveness of the minerals.
The general order of addition depends on the situation: ① When flotation reagents are used for raw ore: pH adjuster - retardant - collector - foaming agent. ② When flotation reagents are inhibited for minerals: active agent ——Collecting agent——Foaming agent.
(2) Peristaltic pump dosing machine dosing method. There are usually two ways of dosing, one is one-time addition, the other is divided into times. One-time addition is to centralize the drug before rough selection. Fill it up at once. The concentration of the drug added in this way is high and it is easy to add. Generally, for drugs that are soluble in water and will not be carried away by the foam and are not easily reflected in the coal slurry and become ineffective, they are often added in one go. amount, such as lime powder, baking soda, etc. The incremental addition is divided into several rounds and multiple additions along the flow of coarse, fine, and sweeping. Usually, 60% to 70% of the total output is added before the flotation agent. Others are added in appropriate locations in several rounds. For the following situations, divided addition should be used: ① Drugs that are easy to oxidize, dissolve, and easily cause qualitative changes, such as xanthate, SO2 gas, etc.; ② are difficult to dissolve in water and are easily absorbed by water. Drugs brought by foam plastics, such as oleic acid and fatty amine collectors; ③ Drugs with strict dosage regulations, such as sodium sulfide. If too much of a part is used, it may have a counterproductive effect.
According to the above regulations, during production and processing, the dosing position and dosage of the peristaltic pump dosing machine design are not allowed to be changed at will. However, in the long-term flotation chemical industry, if the flotation machine "runs out of the tank", " "Sink tank", centralized metal tailings pond with poor quality or large amount and other emergencies, it can temporarily add some agents at appropriate locations to reduce losses as soon as possible according to the situation. But the cause of the abnormality must be investigated in time and as soon as possible Adjust to bring production and processing status back to daily routine.
