KYF (XCF) type and BS-K type pneumatic mechanical stirring flotation machine
These two flotation machines were successfully developed by the North Mine Institute and the China Nonferrous Metals Institute in the mid-1980s. They are similar to the Finnish Outokumpu OK flotation machine and absorb the American Dolly-Oliver flotation machine. The advantages. They are shown in Figures 1 and 2, respectively. The XCF flotation machine is used in conjunction with the KYF flotation machine. The structural features of the two are similar and the dimensions are the same.
The KYF flotation machine is taken as an example.
The flotation machine uses a "U" shaped trough body, a hollow shaft inflating and a suspension stator, in particular a new type of impeller. This is a conical impeller with an angle of blade backwards. It is similar to a high-speed centrifugal pump wheel. It has a large amount of slurry, low head, low power consumption and simple structure. A porous cylindrical air distributor is also disposed in the impeller chamber to allow air to be uniformly dispersed in most of the impeller blades in advance, providing a larger slurry-air contact interface.
During the operation of the flotation machine, as the impeller rotates, the slurry in the tank is sucked from the periphery of the tank from the bottom of the tank to the impeller blade through the bottom of the impeller, and at the same time, the low-pressure air fed by the blower passes through the air distributor of the hollow shaft and the impeller. Also entered into it. After the slurry and air are thoroughly mixed between the blades, they are pushed upward from the periphery of the upper half of the impeller, and the stator is stabilized and oriented to enter the entire trough. The bubble rises to the foam stabilization zone, and after the enrichment process, the foam overflows from the overflow weir and enters the foam tank. A part of the slurry flows to the lower part of the impeller, and then is stirred by the impeller to remix to form mineralized bubbles, and the remaining slurry flows down to a trough until it finally becomes a tailings.
Product example:
1. Jiangsu Baolong The KYF flotation machine produced by the company has the following characteristics: 1 large inflation, uniform gas dispersion and low energy consumption; 2 significant energy saving, saving 30%~50% compared with general flotation machine; The structure is simple and easy to maintain; the wear is small, the cost of wearing parts can be saved by 70%~80%; 4 the pulp circulation performance is good, the consumption of chemicals is less, the consumption can be reduced by 10%~15%; 5 can be configured at the same level The formation of an independent flotation circuit does not require a foam pump, which is superior to other flotation machines; 6 can also be smoothly started after no parking; 7 has an advanced slurry level control system for easy operation and adjustment . Gas supply and administration can be automated.
The technical properties of the KYF type flotation machine and the XCF type flotation machine used as the suction tank are shown in Table 1, and the external dimensions thereof are shown in Fig. 3 and Table 2. The step configuration formed when the KYF type flotation machine is used alone is shown in Fig. 4. The XCF flotation machine has a suction capacity and can be horizontally arranged. No foam pump is required. The horizontal configuration formed when used in combination with the KYF flotation machine is shown in Fig. 5. The dimensions of these two configurations are shown in Table 2.
2. North Mine Institute In recent years, on the basis of the original, the North Mine Institute has further developed KYF and XCF flotation machines. The specifications have increased and the volume has expanded to a maximum of 160m 3 , which is close to or reaches the world advanced level. Its characteristics are: 1 less energy consumption; 2 air dispersion is good; 3 impeller functions as a centrifugal pump to keep the solid in suspension in the tank; 4 wear light, low maintenance cost; 5 with load start; 6 less consumption of chemicals; The structure is simple, the maintenance is easy; the 8U-shaped trough body reduces the short-circuit cycle; 9 the advanced slurry surface control system is convenient for operation and management. The flotation machine is designed with a suction tank to make the flotation operation horizontally arranged, eliminating the need for a foam pump. The technical performance is shown in Table 3. The mounting dimensions and configuration are shown in Figures 6 and 7.
3. Internal machine The factory produces BS-K type flotation machine. Its structure and characteristics are as follows: 1 The main shaft part is hung on the frame, the bearing body structure is light and convenient, the installation is convenient, the transmission parts are adjustable, and it is convenient for maintenance adjustment and overhaul. 2 impeller has a truncated cone shape, the stator is radial, the structure is simple, easy to manufacture, and the stirring force is strong; 3 generally does not have a foam scraper device, can also ensure the concentrate grade, and the operation is reliable, thereby reducing the maintenance workload. The scraper can also be installed in the thin working area of ​​the foam layer; the four-row mine adopts two types of tapered plugs, one is automatic adjustment, which is reasonably matched with automation, and the other is manual adjustment, which is safe and reliable in operation and flexible in up and down movement. In addition, there is a manual adjustment gate, which is reasonable in configuration and convenient to operate. 5 The operation console is on the tank body, which is easy to maintain and operate, has a strong sense of safety, compact equipment and small floor space. The "U" shaped trough body reduces the accumulation of the bottom of the trough, the support of the trough body is reasonable, the span between the supports is large, the equipment stability is good; 6 the energy consumption is low. The total power consumption per unit volume (including the fan) is 0.95~0.97kW/m 3 , and the BS-K38 flotation machine can save about 50% more energy than the JJF-16 and BS-K8 flotation machines than the 6A flotation machine; 7 air The dispersion is good, the bubbles are evenly dispersed, and the foam is stable; 8 the ore particles are well suspended. Due to the strong agitation of the impeller, the slurry is thoroughly stirred. Through different areas and stratified sampling, +80 mesh and other particle grades are evenly distributed throughout the flotation machine, maintaining a good suspension state, no sinking; 9 load start is easy; 10 sorting effect is good. It has been proved by production that the flotation time is up to or exceeds the original flotation index when the flotation time is short or the same; 8BS-K38, BS-K24, BS-K16, BS-K8 flotation machine console is on the tank, occupying land The small area can save a lot of capital investment.
The use and configuration of the BS-K flotation machine are as follows:
The flotation machine is divided into single tank, double tank, three tank, four tank, five tank, six tanks, BS-K38, BS-K24 up to four tanks, BS-K16 up to five tanks BS-K8 up to For six slots, the BS-K4 has a maximum of eight slots and consists of several units. The first part is equipped with a feeding box, the tail part is equipped with a discharging bin, and the middle box is installed between the units. The equipment also comes with a console, foam tanks, railings and cable brackets.
In addition, the flotation machine cannot return to the foam and slurry by self-priming, so it is necessary to use a pump to assist in returning the foam, so that the flotation machine can fully exert the flotation function. This saves energy and reduces production costs. A step configuration is required between each unit. It can also be connected between each row of flotation machines by a running platen to form a large operating table for easy walking and operation.
In order to prolong the service life of the tank body, the foam tank and the impeller and the stator, the tank and the impeller and the stator are lined with wear-resistant materials. The specific form of the railing and foam chute can be selected by the user. Considering that the BS-K4 model is small, there is no operating platform on the tank body, nor a foam chute, and other specifications are all included. When you have special requirements for the foam chute, you can make it at the time of ordering.
The BS-K flotation machine produced by the internal machine and its technical performance are listed in Table 4. The appearance and configuration dimensions are shown in Figure 8, 9 and Tables 5 and 6, respectively. The quality of each component is listed in Table 7.
4. Zhaoyuan Huangji General Factory The technical performance of the BS-K flotation machine produced by the factory is listed in Table 8. The external dimensions and configuration are shown in Figure 10.
Table 8 Technical performance of BS-K flotation machine (Zhongyuan Huangji General Factory)
model | Tank size (length * width * height) /mm×mm×mm | Effective volume / m 3 | Processing capacity / (m 3 /min) | Spindle motor power / kW | Impeller speed / (r / min) | Aeration amount / (m3 / min) | Wind pressure / MPa |
BS-K4 | 1850×1850×1550 | 4 | 0.5~4 | 7.5 | 210 | 3~6 | 0.015 |
FK-2.8 | 1550×1550×1350 | 2.8 | 0.4~3 | 5.5 | 248 | 2.5~5 | - |
The characteristics of the flotation machine are as follows: (1) U-shaped tank body is used for uniform mixing and is not easy to deposit; 2 structure is light and easy to adjust; 3 impeller has a parabolic parabola type, strong stirring force, easy load start; 4 low energy consumption, can be sectioned Electricity 30%~50%; 5 air is evenly dispersed, the foam is stable and suspended, and it does not sink.
In addition, Jiangsu Baolong, Zhangji and other plants also produce BS-K flotation machines.
   Table 1  Table 2  table 3  Table 4  Tables 5 and 6  Table 7
   Figure 1, 2  image 3  Figure 4, 5  Figure 6  Figure 7  Figures 8, 9  Figure 10
Working principle
The design of the steam kettle makes heating and cooking very efficient and fast. Kettles have a double wall or [jacket" covering the bottom and at least half the height of the sides, to provide space for steam to circulate, thereby heating the cooking surface. Typically steam is introduced to the kettle and circulated through the jacket to deliver the heat for processing. The use of steam as the heating medium has many advantages: uniform heating, rapid heat transfer and easy control of the heating rate through a steam valve. Steam can be supplied to the kettle by an independent boiler through a pressurized pipe.
Why choose a steam kettle?
Because steam kettles heat indirectly by blasting the exterior of the kettle cooking chamber with superheated pressurized steam, cream- and milk-based recipes and delicate foods like chocolate are not as easily scorched.
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