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CN-122006859-A - Superfine magnesium hydroxide flame retardant preparation production system and preparation method

CN122006859ACN 122006859 ACN122006859 ACN 122006859ACN-122006859-A

Abstract

The invention discloses a preparation production system and a preparation method of an ultrafine magnesium hydroxide flame retardant, and relates to the technical field of flame retardant production. According to the invention, the ball milling chamber is arranged above the lower isolation disc, the ball milling chamber is configured to grind materials through grinding balls with different specifications, the flow guiding chamber is arranged above the upper isolation disc, the flow guiding chamber is configured to guide in and guide out mixed liquid of the ball milling chamber, and the flow flushing part is configured to flow back the mixed liquid in the flow guiding chamber into the ball milling chamber from bottom to top during circulation stirring of the ball milling chamber, so that the aggregation of the grinding balls on the lower layer of the ball milling chamber is reduced. According to the invention, the back-flowing magnesium hydroxide mixed liquid is conveyed into the ball milling cavity from bottom to top through the flow pipe, so that a flow impact effect on the magnesium hydroxide mixed liquid at the lower layer of the ball milling cavity is formed, a circumferential rotation and axial circulation composite flow field is formed in the ball milling cavity, a grinding blind area at the bottom of the ball milling cavity is eliminated, the ball milling effect of magnesium hydroxide particles is improved, and the production quality of the superfine magnesium hydroxide flame retardant is ensured.

Inventors

  • GAO TING
  • LV LIPING
  • XU WEI

Assignees

  • 江苏意驰新材料有限公司

Dates

Publication Date
20260512
Application Date
20260401

Claims (10)

  1. 1. A preparation production system of superfine magnesium hydroxide flame retardant is characterized by comprising: The tank body assembly (1) comprises a lower isolation disc (2), a ball milling chamber is arranged above the lower isolation disc (2), and the ball milling chamber is configured to realize material grinding through grinding balls with different specifications; The reflux stirring assembly (3) is hermetically arranged at the top of the tank body assembly (1) and comprises an upper isolation disc (4), a diversion cavity is arranged above the upper isolation disc (4), and the diversion cavity is configured to guide in and guide out mixed liquid of the ball milling cavity; the flushing assembly (5) is hermetically arranged at the bottom of the tank body assembly (1) and comprises a plurality of flushing parts which are arranged in a circumferential direction and communicated with the flow guiding cavity, and the flushing parts are configured to flow back mixed liquid in the flow guiding cavity into the ball milling cavity from bottom to top when the ball milling cavity is subjected to circulation stirring, so that grinding balls are reduced to gather at the lower layer of the ball milling cavity.
  2. 2. The preparation and production system of the superfine magnesium hydroxide flame retardant according to claim 1, wherein the tank body assembly (1) further comprises a ball milling production tank (6), a first flange (7) is fixedly arranged at the top of the ball milling production tank (6), a first sealing groove (8) concentric with the first flange is arranged at the top of the first flange (7), a second flange (9) is fixedly arranged at the bottom of the ball milling production tank (6), and a first sealing ring (10) concentric with the second flange is fixedly arranged at the bottom of the second flange (9).
  3. 3. The production system for preparing the superfine magnesium hydroxide flame retardant according to claim 2, wherein the reflux stirring assembly (3) further comprises a diversion box (11) with an opening at the bottom, a third flange (12) matched with the first flange (7) is fixedly arranged at the bottom of the diversion box (11), a second sealing ring (13) matched with the first sealing groove (8) is fixedly arranged at the bottom of the third flange (12), and the upper isolation disc (4) is installed inside the diversion box (11) and is configured to prevent grinding balls from entering the diversion cavity.
  4. 4. The preparation and production system of the superfine magnesium hydroxide flame retardant according to claim 3, wherein a stirring motor (14) is installed at the top of the flow guide box (11), the output end of the stirring motor (14) is connected with a stirring shaft (15), the lower end part of the stirring shaft (15) penetrates through the lower isolation disc (2) and rotates relatively, stirring blades (16) positioned in the ball milling cavity are fixedly installed on the peripheral side surface of the stirring shaft (15), and the length of the stirring blades (16) is gradually increased from bottom to top.
  5. 5. The preparation and production system of the superfine magnesium hydroxide flame retardant according to claim 4, wherein the first conveying pipe (17) and the second conveying pipe (18) are respectively communicated with the peripheral side surfaces of the diversion box (11), a plurality of diversion pipes (19) are arranged in a circumferential array on the peripheral side surfaces of the diversion box (11), the diversion cavity is communicated with each diversion pipe (19) on the peripheral side of the diversion cavity, a backflow port of each diversion pipe (19) is higher than the upper isolation disc (4), and a bearing plate (20) is fixedly arranged on the outer side of the diversion box (11).
  6. 6. The preparation and production system of the superfine magnesium hydroxide flame retardant according to claim 5, wherein the flushing assembly (5) further comprises a reflux box (21) with an opening at the top, a fourth flange (22) matched with the second flange (9) is fixedly arranged at the top of the reflux box (21), and a second sealing groove (23) matched with the first sealing ring (10) is arranged at the top of the fourth flange (22); The inner side of the reflux box (21) is provided with a linkage shaft (24) in a sealing and rotating manner, a plurality of limiting parts are arranged in an inner cavity at the upper end part of the linkage shaft (24), the lower end part of the stirring shaft (15) is inserted into the inner cavity at the upper end part of the linkage shaft (24), the lower end part of the stirring shaft (15) is provided with a limiting groove matched with the limiting parts, and the limiting parts and the limiting groove are configured to realize power transmission between the stirring shaft (15) and the linkage shaft (24).
  7. 7. The production system for preparing the superfine magnesium hydroxide flame retardant according to claim 6, wherein the flushing assembly (5) further comprises a bearing base (25), the reflux box (21) is arranged at the central position above the bearing base (25), a rotating disc (26) is fixedly arranged at the lower end part of the linkage shaft (24), and a bevel gear ring (27) concentric with the rotating disc is fixedly arranged at the top of the rotating disc (26).
  8. 8. The preparation production system and the preparation method of the superfine magnesium hydroxide flame retardant according to claim 7 are characterized in that the flushing part comprises a mounting plate (28) fixed on the top of a bearing base (25), a horizontal through-flow cylinder (29) and a power transmission rod (30) are respectively fixed on the mounting plate (28), the horizontal through-flow cylinder (29) is communicated with a reflux tank (21) through a flushing pipe (31), the flushing pipe (31) is of a bent pipe structure with an angle of 60-90 degrees, a reflux pipe (32) is arranged on the top of the horizontal through-flow cylinder (29), and the reflux pipe (32) is connected with a corresponding diversion pipe (19) in a sealing mode.
  9. 9. The preparation production system and the preparation method of the superfine magnesium hydroxide flame retardant according to claim 8 are characterized in that one end of the power transmission rod (30) is fixedly provided with a bevel gear (33) meshed with a bevel gear ring (27), the other end of the power transmission rod (30) is fixedly provided with a first synchronous wheel (34), the inner side of the horizontal through-flow cylinder (29) is hermetically rotated and provided with a rotating shaft (35), one end of the rotating shaft (35) is fixedly provided with a flushing impeller (36) positioned in the horizontal through-flow cylinder (29), and the other end of the rotating shaft (35) is fixedly provided with a second synchronous wheel (38) connected with the first synchronous wheel (34) through a synchronous belt (37); The flushing impeller (36) is configured to rotate synchronously with the stirring blades (16) when the stirring blades (16) rotate in the forward direction, and the mixed liquid in the diversion cavity flows back into the ball milling cavity along the flushing pipe (31) so as to reduce the aggregation of grinding balls on the surface of the lower isolation disc (2).
  10. 10. The preparation and production system and the preparation method of the superfine magnesium hydroxide flame retardant according to claim 9 are characterized in that the ball milling production tank (6) consists of a lower same-diameter tank body, a variable-diameter tank body and an upper same-diameter tank body, the inner diameter of the variable-diameter tank body is gradually increased from bottom to top, an arc-shaped guide plate (39) tangential to the variable-diameter tank body is fixed on the inner wall of the variable-diameter tank body close to the top, the arc-shaped guide plates (39) are arranged along the circumferential array of the inner wall of the variable-diameter tank body, and a lower isolation disc (2) is fixed inside the ball milling production tank (6) and is configured to prevent grinding balls from entering a reflux tank (21); A hollow guide ring (40) is arranged in a central hole on the bearing base (25), a plugging ring (41) which is in sliding fit with the inner wall of the hollow guide ring (40) is fixed at the bottom of the rotary disk (26), an annular through hole (42) communicated with the inner cavity of the hollow guide ring (40) is formed in the inner wall of the hollow guide ring (40), a suction water distribution pipe (43) communicated with the annular through hole (42) is fixed on the inner wall of the plugging ring (41), a mounting hole (44) on the horizontal through flow cylinder (29) is connected with the hollow guide ring (40) through a drainage pipe, and an opening and closing valve is arranged on the drainage pipe; The impeller (36) is configured to convey the mixed liquid in the ball milling chamber into the hollow guide ring (40) along the discharge pipe and discharge the mixed liquid into the vacuum suction box in an annular track through the suction water distribution pipe (43) when the stirring blade (16) rotates reversely and synchronously with the stirring blade (16).

Description

Superfine magnesium hydroxide flame retardant preparation production system and preparation method Technical Field The invention belongs to the technical field of flame retardant production, and particularly relates to a preparation production system and a preparation method of an ultrafine magnesium hydroxide flame retardant. Background Magnesium hydroxide belongs to a novel inorganic flame retardant, has the advantages of high decomposition temperature, no toxicity, no smoke, no generation of corrosive gas and the like, is widely used by people, and has the defects of small binding force with a polymer, poor compatibility, influence on the processability and mechanical properties of the polymer and the like, and is often modified in the process of preparing the magnesium hydroxide flame retardant in order to improve the compatibility with the polymer. In the production and preparation process of the superfine magnesium hydroxide flame retardant, a ball milling method is generally adopted to carry out ball milling treatment on the modified magnesium hydroxide so as to produce and prepare the superfine magnesium hydroxide flame retardant. The superfine magnesium hydroxide flame retardant is prepared by a ball milling method, wherein the superfine magnesium hydroxide flame retardant comprises magnesium hydroxide, an auxiliary agent, a solvent and a pH regulator. In the process of preparing the superfine magnesium hydroxide flame retardant by the ball milling method, through single stirring She Daidong, the grinding balls rotate in the magnesium hydroxide mixed solution, and although the purpose of grinding magnesium hydroxide can be realized by collision of the grinding balls, heavy grinding balls are easy to deposit and delaminate at the bottom of the tank, so that the collision of the balls at the bottom is insufficient, and large-particle magnesium hydroxide is easy to be broken insufficiently, thereby influencing the production quality of the superfine magnesium hydroxide flame retardant. Disclosure of Invention The invention aims to provide a preparation production system and a preparation method of an ultrafine magnesium hydroxide flame retardant, which solve the problems in the background technology through the specific structural design of a tank body component, a reflux stirring component and a flushing component. The invention relates to a preparation production system of superfine magnesium hydroxide flame retardant, which comprises a tank body assembly, a tank body assembly and a control system, wherein the tank body assembly comprises a lower isolation disc, a ball milling chamber is arranged above the lower isolation disc, and the ball milling chamber is configured to realize material grinding through grinding balls with different specifications; the backflow stirring assembly is hermetically arranged at the top of the tank body assembly and comprises an upper isolation disc, a flow guiding cavity is arranged above the upper isolation disc and is configured to guide in and guide out mixed liquid of the ball milling cavity, and the flow flushing assembly is hermetically arranged at the bottom of the tank body assembly and comprises a plurality of flow flushing parts which are annularly arranged and communicated with the flow guiding cavity and are configured to flow back the mixed liquid in the flow guiding cavity into the ball milling cavity from bottom to top when the ball milling cavity circulates and is stirred so as to reduce grinding balls from gathering at the lower layer of the ball milling cavity. The invention further provides that the tank body assembly further comprises a ball milling production tank, the top of the ball milling production tank is fixedly provided with a first flange, the top of the first flange is provided with a first sealing groove coaxial with the first flange, the bottom of the ball milling production tank is fixedly provided with a second flange, and the bottom of the second flange is fixedly provided with a first sealing ring coaxial with the second flange. The invention further provides that the reflux stirring assembly further comprises a diversion box with an opening at the bottom, a flange III matched with the flange I is fixedly arranged at the bottom of the diversion box, a sealing ring II matched with the sealing groove I is fixedly arranged at the bottom of the flange III, and the upper isolation disc is arranged in the diversion box and is configured to prevent grinding balls from entering the diversion cavity. The invention is further characterized in that the top of the flow guide box is provided with a stirring motor, the output end of the stirring motor is connected with a stirring shaft, the lower end part of the stirring shaft penetrates through the lower isolation disc and rotates relatively, the peripheral side surface of the stirring shaft is fixedly provided with stirring blades positioned in the ball milling cavity, and the length of the st