In recent years, the wet technology for extracting nickel and cobalt from iron- vanadium ore has received increasing attention due to low production costs and environmental protection compared to energy-intensive and air-polluting fire technology. In the case where both iron and aluminum are dissolved and precipitated, the recovery of nickel and cobalt exceeds 90%. The test was carried out by a pressure leaching method, and the test equipment was an acid- injectable titanium autoclave and a sample recovery device. Test conditions: The acid accounts for 30% of the ore mass and the temperature ranges from 230 to 270 °C. The characteristics of solid products in the limonite bauxite ore and leaching process were studied by transmission electron microscopy. The results show that nickel is mainly related to the iron mineral phase, while cobalt exists only in the nickel-rich manganese structure; during the leaching process, the goethite dissolves and releases nickel, and the iron reprecipitates in situ in the form of dense hematite; The cobalt dissolves quickly and remains in the aqueous phase, after which the manganese dissolves, but the dissolution rate is lower than the cobalt dissolution rate. At the end of the leaching, cobalt-depleted manganese particles are obtained. In the test range, the temperature increase during the leaching process has little effect on the dissolution rate of cobalt, but the increase of the slurry agitation rate leads to an increase in the dissolution rate. TEM photographs of solid materials and their respective mineralogical analyses indicate that membrane diffusion is a possible rate controlling step and that the shrinkage core model can be used to explain the dissolution kinetics of cobalt. Tungsten carbide thermal spray powder is a type of powder material that is used in thermal spray processes. It is composed of tungsten carbide particles, which are combined with a binder material to form a powder. Tungsten Carbides,Tungsten Carbide Powder,Tungsten Carbide Coating,HVOF Tungsten Carbide Coating Luoyang Golden Egret Geotools Co., Ltd , https://www.xtclasercladding.com
Thermal spraying is a coating process that involves heating the powder material to a molten or semi-molten state and then spraying it onto a surface to create a protective or functional coating. Tungsten carbide thermal spray powder is known for its hardness, wear resistance, and high melting point, making it suitable for applications where extreme wear or high temperatures are present.
The tungsten carbide particles in the powder provide the coating with excellent wear resistance, while the binder material helps to bind the particles together and adhere them to the surface. The powder can be sprayed using various thermal spray techniques, such as flame spraying, plasma spraying, or high-velocity oxy-fuel spraying.
Tungsten carbide thermal spray coatings are commonly used in industries such as aerospace, automotive, oil and gas, and mining, where components are exposed to harsh environments or abrasive conditions. These coatings can provide protection against wear, erosion, corrosion, and high temperatures, extending the lifespan of the coated components.