Laboratory hopper mixer is mainly used for the tests of mixing different components of dry powders with dry powders, granules with granules, or powders with granules in laboratories. It is an ideal machine for exploring the best process parameters in material mixing, and a mechanically and electrically integrated advanced experimental machine.
Features:
The laboratory mixer is installed on a moveable base. Its main parts include machine frame, rotation system, electric control system, hopper, etc. The conical mixing hopper is mainly composed of hopper, hopper cover, ferrule, butterfly valve, etc.
The hopper that can rotate at 360° is installed on the rotation shaft by adopting the cantilever fixing mode. As the symmetrical axis of the hopper forms an included angle with the rotary arm rotation axis, different components of materials will make three-dimensional movement in the closed hopper, producing strong turning and high shearing and achieving the best mixing effect.
The rotation system is a key system for completing the mixing function. The rotary motor is a low speed high torque speed reducing motor, which is the power unit for mixing. The rotation shaft is installed with sensing components. When the gyrator turns to the set position, the sensor installed on the machine frame sends the sampling signal. The signal passes through the PLC system, which reads the hopper rotation speed and position information, continuously displays rotation speed and accumulated number of revolutions on the touch screen, and sends stopping instructions according to the set time. The hopper stops rotation, and stops at the best discharging position under the action of the brake motor.
The electric control system is mainly composed of two parts such as the electric cabinet and sensor. The core control parts PLC controller and frequency converter are installed in the electric control cabinet. During the use, the operations of electric appliances are mainly completed on the operation panel (touch screen) of the electric control cabinet, including printer, touch screen, power switch and emergency stop switch. The touch screen displays running time, rotation speed, etc.
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1) Pyrometallurgical smelting generally firstly increases the raw ore containing a few percent or a few thousandth of copper by beneficiation to 20-30%, as a copper concentrate, in a closed blast furnace, reverberatory furnace, electric furnace or flash furnace. The smelting smelting is carried out, and the produced smelting (copper copper) is then sent to a converter for blowing into blister copper, and then oxidized and refined in another reverberatory furnace to remove impurities, or cast into an anode plate for electrolysis, and the grade is up to 99.9% electrolytic copper. The process is short and adaptable, and the recovery rate of copper can reach 95%. However, the sulfur in the ore is discharged as sulfur dioxide exhaust gas in the two stages of smelting and blowing, which is difficult to recycle and easily causes pollution. In recent years appear as white bath smelting silver method, Noranda method as well as Japan's Mitsubishi method, pyrometallurgical gradually to the continuous, automated development.
2) Modern wet smelting has sulphation roasting-leaching-electrowinning, leaching-extraction-electrowinning, bacterial leaching, etc., suitable for low-grade complex ore, copper oxide ore, copper-containing waste ore heap leaching, tank leaching Or leaching on the spot. Wet smelting technology is gradually being promoted. It is expected to reach 20% of the total output by the end of the century. The introduction of wet smelting will greatly reduce the cost of copper smelting.
Introduction of copper
Copper is one of the earliest human discovered an ancient metal, and began to use copper as early as 3,000 years ago humans. Metallic copper, elemental symbol Cu, atomic weight 63.54, specific gravity 8.92, melting point 1083oC. Pure copper is light rose or reddish, and the surface is copper-copper when it forms a copper oxide film. Copper has many valuable physicochemical properties, such as high thermal conductivity and electrical conductivity, strong chemical stability, high tensile strength, easy fusion, corrosion resistance, plasticity, and ductility. Pure copper can be drawn into very thin copper wire to make a very thin copper foil. It can form alloys with metals such as zinc , tin , lead , manganese , cobalt , nickel , aluminum and iron . The development of copper smelting technology has gone through a long process, but so far copper smelting is still dominated by pyrometallurgical smelting, and its output is about 85% of the world's total copper production.