Before the test, the amount of the prepared preparation should be sufficient; it is necessary to understand and check the composition, purity, impurity content and source of the used agent to find out whether it is deteriorated; the water-soluble agent is added into the aqueous solution; the water-insoluble agent such as oleic acid and the second oil Black medicine, etc., directly added by a medical syringe. The prepared solution cannot be left for too long due to the deterioration of the agent due to decomposition, oxidation, and the like. The article also gives the calculation formula for the amount of added drugs, which can be used as technical guidance for practitioners related to “adding pharmaceuticals”, and can also provide reference for administrative and technical management personnel of mining enterprises. Before the test, the amount of the prepared preparation should be sufficient for the entire test and sealed and stored in the desiccator. Before using the drug, it is necessary to understand and check the ingredients, purity, impurity content and source of the drug used to determine whether it has deteriorated. The water-soluble agent is formulated into an aqueous solution. In order to facilitate the conversion and addition, when the weight of each raw ore sample is 500g, add tens to one or two hundred grams of the agent per ton of ore, which can be formulated into a concentration of 0.5%. Can be formulated to a concentration of 5%. When the ore weight is 1 kg, it can be formulated into 1% and 10% depending on the amount of the agent. The so-called 10% concentration means that 100 grams of the solution contains 10 grams of the drug, that is, 10 grams of the drug plus 90 grams (equivalent to 90 milliliters) of water, when the solution volume is not 100 milliliters in most cases, but Between 90 and 100 ml. If the amount of the added drug is required to be 1 gram, the amount of the added solution is not an integer and is extremely inconvenient. Therefore, in actual configuration, 10 grams of the medicament is dissolved in water to a total solution of 100 ml, that is, the actual concentration unit is "10 g / 100 ml", but it is still customarily referred to as 10%. When the concentration of the solution is very thin, the actual difference between the two is small. The amount of the added agent can be calculated as follows: V = (qQ) / (10M) where: V - volume of the added solution, ml; q - the amount of the agent, g / ton; Q - the weight of the ore tested, kg; The concentration of the drug to be used for M-, the amount of the water-soluble drug to be added can be used for pipetting camps, measuring cylinders, measuring cups, and the like. Non-water-soluble agents, such as oleic acid, No. 2 oil, black medicine, etc., are directly added by a medical syringe, but the actual weight of each drop of the drug needs to be determined in advance, and it is possible to drip 10 drops or more of the drug on the analytical scale. The method of weighing is determined. If necessary, an organic reagent can also be used as a solvent or as an emulsion. When using an organic reagent as a solvent, it is necessary to determine its effect on flotation. The amount of lime and the like is large, and it is necessary to add the agent in the mill, and the solid can be directly added without being formulated into a solution. Due to decomposition, oxidation and other reasons, the prepared solution can not be left for too long, such as xanthate, sodium sulfide and the like must be used on the same day.

Zinc Die Casting

Zinc is one of the most versatile die cast metals. It provides higher precision with lower tooling costs when compared to other die cast metals like aluminum or magnesium. Zinc Die Casting also offers a broad range of excellent physical and mechanical properties, finishing characteristics, and is the easiest to cast. Die casting is a versatile, efficient and economical process for producing engineered metal parts.
Die casting offers a broader range of shapes and components than any other manufacturing technique. The die casting process requires a steel mold. These reusable steel molds, called dies, can be designed to produce complex shapes with a high degree of accuracy and repeatability. The dies are mounted into a machine that injects molten metal into the dies under high pressure. Once the molten metal has solidified, the die is opened and the casting is ejected from the mold. The die is then closed and the process starts over.