Slate potassium-rich fraction is selected from potassium feldspar beneficiation of iron ore and concentrate, characterized in that the steps are as follows: (1) Reverse Flotation: a particle size of -200 mesh to 90% or more for the potassium-rich Slate The raw material is subjected to reverse flotation, and the reverse flotation adopts one rough selection, one selection and one sweep, and the selected tailings and sweeping concentrate are returned to the rough selection tank to continue rough selection. The pharmaceutical system: the inhibitor is water. The glass and collector are fatty acid collectors and the foaming agent is No. 2 oil. During the reverse flotation process, the mass concentration of the pulp is 30% to 50%, the pulp pH is 8-10, and the pulp temperature is 18~. 35 ° C, the amount of crude selection of the drug by weight: inhibitor 0.5 ~ 2.0Kg / t, collector 1.5 ~ 4.5Kg / t, foaming agent 0.005 ~ 0.02Kg / t, selection and sweeping agent added According to the weight ratio: inhibitor 0.5～1.5Kg/t, collector 1.0～3.0Kg/t, foaming agent 0～0.015Kg/t, the foam obtained by reverse flotation is easy to float tailings, the pulp is rich Potassium feldspar concentrate; (2) Strong magnetic separation: strong magnetic separation of the anti-flotation of potassium-rich feldspar-rich concentrate, obtaining magnetic minerals and non-magnetic minerals rich in potassium feldspar, magnetic field The degree is 1.0~1.2T; (3) Weak magnetic separation: Weak magnetic separation is performed on the floating flotation of the easy-floating minerals and the magnetic minerals selected by the strong magnetic separation. The weak magnetic separation adopts one rough selection, one selection and one time. The sweeping process will combine the selected tailings and sweeping concentrates and then combine them for rough selection. The magnetic field strength of the rough selection is 0.2~0.26T, and the magnetic field strength of the selected and sweeping is 0.17~0.2T. Concentrate and sweeping tailings; (4) Positive flotation: positive flotation of non-magnetic minerals rich in potassium feldspar obtained by strong magnetic separation, using one rough selection, one selection and one sweep, the fine The tailings and sweeping concentrates are returned to the coarse selection tank for further rough selection. The reagents used for the flotation are: the adjusting agent is sulfuric acid or hydrofluoric acid, the collector is an amine collector, and the second oil is foaming. In the process of positive flotation, the mass concentration of the pulp is 30% to 50%, the pH value of the pulp is 2 to 3, the temperature of the pulp is 18 to 35 °C, and the amount of the coarsely selected agent is added. According to the weight ratio: collector is 1.5-4.5Kg/t, foaming agent is 0.005-0.02Kg/t, and the amount of selected and sweeping agent is added by weight: collector 1.0-3.0Kg/t Electrofusion welding is the name given to resistive implant welding of thermoplastic pipes. It is one of two main techniques used for the joining of polyethylene gas and water pipes. Electrofusion welding employs fittings that are placed around the joint to be welded. Metal coils are implanted into the fittings, and electric current is run through the coils to generate heat and melt part of the pipes, forming a joint upon solidification. There are two possible fittings used in electro fusion welding: couplers and tapping tees (electrofusion saddles). Electrofusion Machines/Electrofusion Welders are used for electrofusion fittings welding. Electrofusion Fittings are a heat treatment method compared to butt fusion methods and are used to generate heat. Electrofusion welding is a type of pipe welding and polyethylene fittings, in which there are special connections that have electrical resistance wire to create welding melting temperatures. The electric current is transmitted through the electrofusion welding eequipment and through the control box to the two ends of the connection. Yuda offers a fulll range of EF315 HDPE Electrofusion Welders, EF500 poly pipe electrofusion welding machine, EF630 HDPE Fitting Electrofusion Equipments and EF800 Electrofusion hdpe fittings machines Electrofusion Machine,Electrofusion Equipment,Electrofusion Welding Machine,Electric Fusion Welding Machine WUXI MEIERTE MACHINERY TECHNOLOGY CO.,LTD , https://www.wxpipefusionweldings.com