The role of oxygen in the capture of metal sulfide ore by xanthate
Xanthate collector is the main metal sulfide flotation, but only in the presence of oxygen takes place only xanthate. When flotation of metal sulfide ore, the role of oxygen mainly has the following two points: Therefore, the repulsion of the negative electricity can be eliminated, and the adsorption of the flotation agent on the mineral surface is facilitated. The role of galena and xanthate can be written as: Manual Welding Fume Exhaust System
1. Product description:
Manual welding fume exhaust system is an entire dust and smoke extraction system for multi-welding station workshop. For industrial central dust extraction, we usally have cantilever type fume extraction system for manual welding, hoodus suction type welding fume extraction system for manual and robotic welding, room type fume extraction system for robotic welding, blow suction type fume extraction system for manual or/and robotic welding.
2. Moland Product Series
Moland Portable Fume Extractor series contain of MLWF50, MLWF70, MLWF100, MLWF360, MLWF120, MLWF200, MLWF280-basic, MLWF280S, MLWF290, MLWF300, MLWF300A, MLWF350, MLWF350D, MLWF400, etc.
Except portable fume extractors, we also supply stationary fume extractors (MLWF350-dust bucket type, MLWF500-6T, MLWF500-6T dust bucket type, MLWF500-9T, MLWF800, MLWF800-dust bucket type, MLWF1000, MLWF1500, MLWF2000, MLWF3000, MLWF3500, MLWF4000). The electric control cabinet can be seperated from main equipment for convenient operation when the main equipment is placed outdoors.
Grinding dust extractors are our another dust extraction product series, which contain of downdraft table (MLWF100D, MLWF150D, MLWF200D, MLWF320-DM, MLWF180, MLWF380, MLWF480) and grinding cabinet (MLWF900). The grinding cabinet is usally equipped with telescopic or fixed grinding room, to form a semi-closed space to control dust and smoke spread. It also improves the filtration efficiency with low air volume and energy consumption.
3. R&D
In order to provide advanced products, our R&D department develops 3 to 5 new products every year, and irregularly improves the performance, appearance, and installation methods of existing products.
4. Certification
All our products are approved by CE, ISO9001, ISO14001, utility model patent, design patent, Program copyright, etc.
5. Exhibition
Moland participates at least 5 industry exhibitions each year.
6. Central Fume Extraction System
1) Cantilever type fume extraction system
Cantilever dust removal can be used for manual welding conditions where the work stations are evenly distributed and the span is small. The smoke and dust generated by each welding station can be effectively absorbed at the dust generation point, and will not pollute other parts of the workshop. The skeleton of the suction arm is similar to a human arm and can hover in a space within a certain length. The outer layer of the suction arm is a temperature-resistant hose, which not only prevents the hose from being burned by sparks, but also ensures the flexibility of the movement of the suction arm. A unique rotating structure is designed on the position of the Suction Hood to ensure that the suction hood can be aligned with the welding position in any orientation, so that the suction arm can effectively capture the smoke and dust generated during the welding process. The advantage of the suction arm capture is that it can be close to the place where the smoke is generated, and the collection effect is better.
2) Hood suction type fume extraction system
Cantilever dust removal can be used for manual welding conditions where the work stations are evenly distributed and the span is small. The smoke and dust generated by each welding station can be effectively absorbed at the dust generation point, and will not pollute other parts of the workshop. The skeleton of the suction arm is similar to a human arm and can hover in a space within a certain length. The outer layer of the suction arm is a temperature-resistant hose, which not only prevents the hose from being burned by sparks, but also ensures the flexibility of the movement of the suction arm. A unique rotating structure is designed on the position of the suction hood to ensure that the suction hood can be aligned with the welding position in any orientation, so that the suction arm can effectively capture the smoke and dust generated during the welding process. The advantage of the suction arm capture is that it can be close to the place where the smoke is generated, and the collection effect is better.
3) Room tupe fume extraction system
Room-type dust removal is suitable for the purification of fumes and smoke generated during the production of automated equipment, such as welding robots, welding machines, grinding, grinding and polishing of metal and plastic parts, drilling, thermal processing, cutting and crushing, stone processing, powder packaging, solid particles and various dusts and fumes produced by mixing and processing.
For working conditions such as robot automatic welding, circular seam and longitudinal seam welding, the smoke and dust purifier is installed with the robot workstation, so that the workstation has its own dust removal function. The fume and smoke are effectively collected through equipment components such as pipes and dust hoods. The room-type design prevents the volatilization and diffusion of smoke to keep the air in the workshop clean.
The working conditions with moderate welding workpieces and large amounts of dust and smoke are suitable for room-type treatment solutions. The room type centralized dust dedusting solution is divided into side suction and top suction method dust collecting ways. The appropriate solution can be designed according to the site conditions and treatment goals.
4) Blow suction type fume extraction system
Blow-suction type dust removal solution is a ventilation air flow composed of blown air and inhaled air flow. Therefore, it is a dust removal method that can effectively control the spread of pollution sources. This dust removal method is installing exhaust inlets on two-span center column or single-span side column (wall) and air outlets on the opposite wall column to form a circulating air flow to drive the smoke and dust into the purification machine, consequently performing overall dust removal and purification in the workshop. This system occupies a small area and has obvious purification effect, which is suitable for the purification of smoke and smoke in more complex production workshops.
7. Company information
Jinan Moland Environmental Tech Co., Ltd., is located in No. 11889 Jingshi West Road, Changqing District, Jinan City, Shandong, China, established in 2016. It`s an environmental protection technology enterprise specializing in research, development, manufacture and sale of efficient smoke purification systems.
The company is committed to reducing the environmental impact of production process, protecting workers from harmful gases and dust, and creating a cleaner working environment. At present, the company′s products have been successfully applied in automobile, railway, construction machinery, marine engineering, aviation and other mechanical processing industries, as well as new materials, grain, wood, recycled resources processing and other industries. The company has passed the ISO 9001 quality management system certification, obtained the certification of China Environmental Protection Products issued by China Environmental Protection Industry Association, and CE certification of EU. It also has a number of invention patents, utility model patents and appearance patents. Through continuous R&D and innovation, many products of the company have reached the international leading level.
Moland′s environmental services cover the whole process from project design, product manufacturing to installation, commissioning and after-sales service. We will provide you with the most professional governance program and the best quality service.
Manual Welding Fume Exhaust System,Welding Dust Collector,Cartridge Filter Jinan Moland Environmental Tech Co.,Ltd , https://www.sdmoland.com
1. Formation of semi-oxides on the surface of sulfides During the flotation process, the surface of the sulfide minerals is slightly oxidized to facilitate flotation, and excessive oxidation will reduce the floatability. Most of the sulfide ore is oxidized on the surface after oxidation. Galena e.g. surface oxidation film formed PbSO 4, reaction formula:
PbS+2O 2 →PbSO 4
Since the solubility of the sulfate is much larger than the corresponding sulfide, this facilitates the ion exchange between the xanthate collector and SO 4 2- . For example, the surface of galena is slightly oxidized. When it is collected by xanthate, the following replacement reactions exist:
PbS] Pb 2+ 2A - +2X - →PbS] Pb 2+ 2X - +2A -
In the reaction formula, X - represents a xanthate anion, and A - is SO 4 2- or SO 3 2- .
However, the oxidized galena has a thick lead sulfate shell formed on its surface, and the solubility of lead sulfate is too large and unstable. The collector ions cannot be strongly adsorbed and floated, so galena oxidation Too deep, its buoyancy is worse.
The degree of oxidation is affected by the following factors: the temperature of the pulp, the application of the oxidant, the presence of oxidation products on the surface of the mineral, the pH of the slurry, the strength and time of the aeration, and the oxygen content of the water.
2. The presence of oxygen eliminates the potential grid on the surface of the sulfide mineral and promotes the electrochemical reaction of the mineral surface.
Since sulfide minerals contain more or less impurities, there are various lattice defects, which make it have semiconducting properties, and have both a positive and a cathode region. For example, galena generally contains silver in a cyanide-containing slurry. Silver reacts as follows:
Ag+2CN - →Ag(CN) 2 - +e
Free electrons are generated and transported to the cathode region, causing more electrons in the vicinity of the cathode region to accumulate, resulting in a negative potential grid. In this way, it is bound to generate an electrostatic repulsion to the xanthate anion X- near it, preventing it from adsorbing on the mineral surface. However, in the presence of oxygen in the slurry, the following reactions can occur: 