Ball grinder available for solid state reaction of powder

Abstract

The invention relates to a ball grinder available for the solid state reaction of powder, which mainly comprises a ball grinding cylinder, an electromotor, a driving device, a grinding ball and a material inlet and outlet, wherein the horizontal type ball grinding cylinder is fixedly supported on a bracket; a jar is internally provided with the girding ball; the center of the ball grinding cylinder is provided with a rotatable main shaft; the main shaft is driven by the electromotor through the driving device to rotate; the main shaft is provided with a blade, wherein the rotating speed of the blade is 300-2000 r / min; the mechanical energy is transmitted to the grinding ball through the beating of the blade, so that the grinding ball can irregularly move with high speed; the bottom of theball grinding cylinder is in the shape of gradient with 0-30 degrees from the two ends to the center; the jar body of the ball grinding cylinder is provided with a cooling sleeve and an inlet and an outlet of cooling medium; and the jar body of the ball grinding cylinder is provided with an air exhausting opening and an air inlet. The ball grinder can lead the grinding ball to generate higher mechanical energy to provide high energy for inducing the solid state reaction among materials, thereby smashing, grinding and dispersing the materials and directly reacting to generate nanometer composite oxide.

Description

technical field [0001] The invention relates to a powder processing equipment, in particular to a ball mill, which can be used for ultrafine powder grinding, and can also be used for powder solid-state chemical reaction, such as grinding to prepare nano-composite oxides. technical background [0002] Ball mill is a commonly used powder processing equipment, which is widely used in the dispersion, grinding, mixing and mechanical alloying of various materials. Traditional ball mills are mostly vertical (such as the QM-1SP developed by Nanjing University, Chinese patent, patent No. ZL 02220259.5), and its structure is that several ball milling tanks are symmetrically installed on the turntable vertical to the ground. Under the action of centrifugal force, the movement will grind the powder in the tank to achieve the purpose of crushing the material. Chinese patent 200610045805.3 discloses a mechanical grinding technology, which proposes that under the action of specific atmosp...

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Problems solved by technology

Obviously, the existing vertical ball mill is difficult to meet the above requirements. Because the supporting shaft of the ball mill pot is supported by a cantilever beam, the alternating bending stress at the support is large, and it is easy to fatigue and fracture. Therefore, the maximum speed of the equipment can only reach 600 rpm, and the internal structure of the ball mill is simple, the steel balls only do simple centrifugal motion, so the mechanical energy generated by the steel balls is limited, and generally can only be used for grinding raw material particles. In addition, because ordinary ball mills do not have an effective temperature adjustment structure , it is impossible to eliminate the high temperature caused by the collision and friction between the material, the grinding ball and the tank wall, resulting in the accumulation and agglomeration of the material, which affects the solid state reaction effect of the material and the physical and chemical properties of the final product, uneven particle size, quality Not stable enough; in addition, there is no control and adjustment structure for the reaction atmosphere in the tank

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