Electrodialysis Electrolysis Treatment of Waste Hard Alloys for Recovery of Cobalt and Tungsten Carbide

Carbide Materials Process Electrodialysis Electrolysis Solution Disposal of Waste Cemented Carbide Recovering Metallic Cobalt and Tungsten Carbide Tang Yunyun Department of Chemistry, Yiyang Teachers College, Yiyang, Hunan, 413049 Duanping Yiyang Powder Metallurgical Plant, Yiyang, Hunan, 413000 Cobalt and Carbonization The principle and method of tungsten.

1 Introduction Due to its high hardness and wear resistance, hard alloys occupy a very important position in high temperature and corrosion resistance materials of a modern material. At present, the world's cemented carbide core is estimated to reach 30,000 years. The demand for nearly 7,000 waste carbides is the most important part of the recycling of metallic cobalt and tungsten. There are many recycling methods for waste carbides. This paper reports on the use of sulfuric acid as the electrolyte, electrolysis treatment and cation exchange membrane electrodialysis to treat waste carbs, carbides, and cobalt and tantalum carbide ions, reducing chemical reagents. The consumption. Simplified recycling operations.

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2 Experimental 2.1 Preparation of Ion Exchange Membrane When electrodialysis electrolysis is used to treat waste cemented carbide, a cation exchange membrane, abbreviated as Yang membrane, is used as electrodialysis membrane. It can be prepared by preparing functionally high-grade materials. Polystyrene, like benzene ring Ge like benzene, 4 generation, generation reaction, is a good material for the ion exchange depolymerization of the parent material. A styrenated hydrazine is copolymerized with a small amount of 12 vinyl hydrazine benzene to form a slightly cross-linked polymer to ensure its mechanical properties. Thermochemical stability 23, the polystyrene was made into a sheet-like film, which was swollen with a solvent and then regenerated. The resultant sulfonated polystyrene was freed from a cation exchange membrane having good performance.

This film is a homogeneous film. Although its mechanical properties are not as good as the grinding of nets, there are more than two articles, and there are studies on the disposal and comprehensive utilization of waste materials. Academic journals at or above the provincial level Relevant papers have more than one film, but because of their small porosity, they are not easy to leak, their thickness is thin, their film resistance is low, and their parts are of the same nature, they have better selective permeability, higher chemical stability and Temperature resistance, and is not easy to fouling, so, we use the homogeneous membrane 2.2 recovery experimental device pole, cation exchange membrane is strictly to block the entire reaction as positive and negative chamber, the positive electrode chamber, the electrolyte solution is dilute sulfuric acid, from The initial concentration of 1.2 waste carbide is packed in a porous plastic basket and placed next to the anode plate, or the anode plate is directly inserted into the perforated plastic basket along the wall of the basket; the polar water in the negative electrode room is pure water 1 cation exchange membrane 23 Recycling principle The possible side reaction is that in the anode chamber, the acidity of the solution is extremely high, the number of buckles is very small, and the discharge potential of 0 is high, so in fact, it is difficult for the two side reactions to occur that the cathode reaction is mainly hydrogen generation. Hydrogen is the return In the treatment of a by-product, its possible side reaction for this side reaction on the dialysis dialysis electrolysis reaction has no positive impact, except that the metal cobalt carbide is directly obtained in the anode chamber is a solid solution of cobalt metal and tungsten carbide, in the electrolysis And electrofluidic process. The binder phase gold flex diamond discharges at the anode. Generated, ion, and it passes through the positive film under the action of a DC electric field, moves into the cathode chamber, and begins to precipitate, with the value of the lifting of the pole chamber, the precipitation of the final 02 precipitation, hard phase 1. not The reaction eventually becomes a skeleton or self-exploding into a scale in the Yin Yin porous plastic basket.

23.1 Principle of electrodialysis 2.4 Recycling operation method 扪 Ion exchange membrane structure, eg, 03, the active exchange group on the benzene ring of the polymer matrix is ​​composed of negatively charged fixed ions and strong cations in aqueous solution. When the active exchange group is ionized, the active cation diffuses into the aqueous solution, which destroys the original neutrality of the active exchange group and makes the fixed ion on the membrane become negatively charged, resulting in the positive membrane attracting cations in the aqueous solution. The ability to repel anions.

Under the action of an external DC electric field, the ions in the reaction cell move in a fixed state, positive ions migrate to the negative electrode, and negative ions move away from the positive electrode. However, since the ionized membrane membrane is negatively charged, it has the ability to attract cations in the solution and repel the anions. The ability to selectively permeate only the ion-exchange membrane in the solution allows the selective permeability of the ion-exchange membrane to be used to transfer the dissociation of part of the solution to the four-part solution under the action of an external DC electric field. Achieve Concentrate Purification Synthetic Separation Goal 23.2 Electrolysis Principle Electrolysis principle is mainly oxidation-reduction reaction 2.4.1 Recovery treatment process waste cemented carbide The cathode crucible is dried or I calcined and reduced by heat Deionized jellyfish plantation Star abandonment To wash the gold ball diamond powder lotion, to test the screening double 0 powder, the reaction is mainly the dissolution of cobalt.

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