TWI291893B - - Google Patents

Description

1291893 V. INSTRUCTION DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a method for producing a high solid content particulate powder slurry, and more particularly to a slurry obtained by centrifugation in a vibration and stirring environment. In the vibration and agitation, the powder bridge in the slurry is destroyed, and the solid and liquid are further separated by energy such as secondary centrifugation to increase the centrifugal efficiency and contribute to obtaining a slurry with a higher solid content. [Prior Art]

Nano-grade materials have high activity, large surface area, self-assembly, superlattice characteristics and special photoelectric effect. In the next five years, China will invest more than 2 billion yuan in research and development, and the output value of nanometer will reach in 2010. The size of a hundred billion dollars. Through the development of nano-characteristics, new breakthroughs in technology and products will be brought about, which will change the future lifestyle of people's livelihood. For example, new generation energy storage products provide high energy storage density batteries and high-efficiency environmentally friendly energy sources, accelerate the development of low-pollution and high-efficiency energy sources, and reduce air pollution and petrochemical energy consumption.

The nanoelectronic components manufactured at the nano level will far outweigh the existing semiconductor technologies in terms of component density, speed, energy consumption and cost. Nanotechnology's home appliances such as nano-fans, dehumidifiers, air cleaners, air-conditioning, etc.; as well as nano-technology applications such as clean bathroom equipment, mainly focus on deodorization and sterilization. Nano materials and processing can be applied to all aspects of food and clothing such as medicines, which can accelerate the absorption of the body; the glass and clothes of buildings have the function of fire prevention and sterilization; and the windshield and mirrors on the car are not Easy to fog, bright, etc. Nano-grade textiles with intelligence, comfort, health and functionality. The fiber itself or its surface is treated with nano-related technology to produce warm, waterproof, breathable, and resistant

Page 5 1291893 V. Description of invention (2) Effects such as pollution, deodorization, sterilization, and gloss change. The application of these forestry technologies has gradually entered the market and become an inevitable need of people's livelihood. On the other hand, the application of the powder slurry is extensive, and the particle α-A 1 2 0 3 is taken as an example, and its potential is endless. 4°/。 The demand for non-metallurgical aluminum alumina has an average annual growth of about 2. 4 ° /. It will reach 4.4 million metric tons in 2006. However, it is understood that its growth direction is also slightly different from the past. The most obvious is that the amount of use in the past has increased, and there have been new uses; the amount of refractory used has only grown in a small amount, while in the synthesis of zeolite (Z e ο The amount of 1 ite, as a cleaning agent) and other aluminosilicates, as well as refining catalysts, has increased, and its growth rate has exceeded 2 · 4 % / year. In addition, alumina used in the electronics industry in precision ceramics and abrasives has also increased significantly, with a growth rate of 16 to 30% per year. It is worth noting that the oxidized powder used in synthetic minerals and grinding operations is dominated by particulate powder. Since the yield and cost of chemical synthesis are related to the reactivity of the raw materials used in the synthesis, and the particle size is also the main factor', therefore, if there is a readily available fine-grained raw material, it will contribute to the reduction of the product cost, resulting in a large amount. Adoption. This is helpful for the incorporation of nano-α-A 1 2 3 micropowder into the future of oxidation. In addition to the conventional grinding function, the alumina powder used in the grinding operation is currently the most popular consumable object for the polishing of metals and metal oxides. However, with regard to the increase in the demand for the powder slurry P as described above, since the powder content affects the transportation cost and the subsequent process has become a problem, the low powder content greatly increases the cost of transportation and storage, and the subsequent cooperation Extrusion processes and the like generally require high powder content.

1291893 V. Description of invention (3)

Up to now, centrifugal sedimentation can be used to enhance particle sedimentation and accelerate the sedimentation process of the particles. In the centrifugal force field, the artificial centrifugal acceleration can be several tens of times or even hundreds of times greater than the inherent gravitational acceleration in nature, so that fine-grained and low-density materials settle much more effectively in the centrifugal field than in the gravity field. Centrifugal sedimentation is a highly efficient sedimentation method 'has been used as a concentrated treatment method for powder slurry. It uses the density difference of solid two phases to rapidly settle the solid phase particles dispersed in the suspension in a centrifugal position. Process, centrifugal sedimentation can be concentrated, clarified and graded according to different separation requirements. There are two types of work methods: idle discharge and continuous discharge. However, in the face of high solid content requirements, the treatment effect is not satisfactory. In view of the above high solid content problem, it is very important for concentrated nano pulp, because the concentrated pulp has a compression and decompression process similar to computer files, convenient for transportation, transportation and application; plus the concentration process must avoid damage The dispersibility of the powder particles can be restored to the original paddle performance by simple treatment (for example, adding water) during decondensation; the concentrated paddle material does not change its properties after long-term storage. In the past, the use of flocculants, re-filtration and drying processes were not suitable.

However, the treatment method described in the past literature does not mention the powder bridging process after destroying a centrifugal slurry. Since the centrifugation process can increase the solid content of the slurry, the centrifugation process causes the coarse powder or coarse coagulum to be stressed. Large and rapid sedimentation, fine powder or fine coagulation remains in the upper layer of the slurry. This phenomenon, even if the centrifugal speed is increased and the working time is lengthened, the solid content of the slurry obtained after separating the liquid is limited.

Page 7 1291893 V. INSTRUCTIONS (4) Destruction of powder bridging technology has been applied to powder conveying in food, pharmaceutical, ceramics, and chemical industries, but there is currently no centrifugal crushing powder bridge designed for concentrated slurry. The process, especially the non-added and non-heated properties, achieves the effect of increasing the solid content, and the residual moisture is mostly left between the powder contact surfaces of the powder layers, and the stirring causes the upper and lower powders to be discharged. The effective accumulation of the powder makes the accumulation denser. As the grading treatment can increase the density, the secondary centrifugation is continued. In the centrifuge tube, the centrifugal force acts on the powder because the powder density is greater than the liquid, and the water is along the water. The intergranular gap moves up and the intergranular water is discharged. At the same time, the method can treat the nano powder or the general powder, and the process method is different from the conventional one, which not only improves the solid content, but also increases the value of the slurry. Adding agitation to homogenize the powder, reducing the defects of subsequent processes, which is a new use not mentioned in the literature, especially suitable for the special requirements of nano-powder. Sex. SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing circumstances to create a high solid content particulate powder slurry manufacturing method, in particular, a slurry obtained by centrifugation, placed in a vibrating and stirring environment, due to moisture content Affecting transportation costs, packaging, storage, and subsequent processes, using vibration and agitation to break the powder bridge in the slurry, and stirring can achieve large and long-range movement of the slurry powder, while vibration provides short-range movement of the powder. The energy, before the second centrifugation, first arranges the fine powder in an orderly and dense manner, and then separates the solid and liquid by the secondary centrifugal energy, without heating, so the slurry is not deteriorated, so that the large-width can increase the centrifugal efficiency. And it is helpful to obtain a slurry having a higher solid content, for example, increasing the alumina alumina content of 3 6 % solid content to 54.6% or more.

Page 8 1291893 V. INSTRUCTIONS (5) ^ The invention can quickly settle powder, is advantageous for mass production, and has the advantages of fast, simple and low cost. [Embodiment] Next, the specific contents of the present invention and the effects thereof can be exemplified in detail. The nano alumina slurry having a particle diameter of less than 1 Ο Ο η Π1 is obtained by a solution chemical reaction method. 'The solid content is less than 丨9 ν 〇丨%. Figure 1 shows the solid content change in the tempering value of 1 1 · 4, the rotational speed of 600 rpm, and the time is 2~1〇, and the solid content after 5 minutes. A few fixed values confirm the extended working time, including re-centrifugation, which does not help the solids content. The procedure for the implementation of this case is as follows: 1. One-time centrifugation: Centrifugal conditions are 1 rpm, time 丨〇 minutes, and the clarified water of the upper layer of I material is removed after one centrifugation. 2 · Vibration and 1 f 2 · Mixing speed 5 rpm, after 10 minutes, the ultrasonic vibration 2 〇 / knife clock. Rpm, time 10 minutes 3 ·Secondary centrifugation: Centrifugal conditions are the vibration and drop treatment of the 1 转 a 粗 , , , , , , 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 This is dense. And the orderly stacking arrangement, the second stack is the comparison table of the solid content of alumina in the acidic solution, after -A. By centrifugation and the second centrifugation amount of the present invention is between 39 and 48·5 vol%, and the vibration LH, the solid content after one centrifugation is between 45·7~56·4v〇U, and the ratio is twice after the treatment. Centrifugal solid early use vibration or ultrasonic effect is good,

1291893 V. INSTRUCTIONS (6) So shake and stir Ilu solid content. 5 0 v ο 1 % of the lower limit of solid content, too much water and agitation to reduce the cracks caused by the application of centrifugal powder. This vibration and agitation environment are also known for their high physical properties. The above powder is placed in a stirred environment, and the above-mentioned powder can be used in the mixed slurry to centrifugally concentrate the slurry during the action of the double shock and impact. After the above-mentioned stirring procedure, the method of secondary centrifugation followed by sequential centrifugation can effectively increase the amount of oxidation, and the homogenization will be homogenized. The body is produced in a separate medium of complete value, and the mixing and stirring layer powder slurry is prepared. When the material is placed in the earthquake, the vibration and the vibration can be stirred and the centrifugal process is performed once, and the powder in the mixed slurry is further separated to obtain the powder.

Rice alumina is directly suitable for ceramic extrusion molding, and the extruded green body is too soft and deformed. In addition, the vibration thickness particle size can be densified and accumulated, and the large-scale molding and sintering defects, such as shrinkage cannot be solved without using centrifugation. The problem, plus no need to warm and add the agent, and retain the use of the solution, the practicality of the process improvement and the key into the mixing process, the pulp will be treated with the power and time, during the stirring process, magnetic stirring And the purpose of the collection of bubble agitation. When entering the vibration program, the power and time are adjusted in the first moving environment to be treated. In the seismic eccentric vibration, ultrasonic vibration, and the combination, the powder energy of the powder can be obtained in the powder slurry. The material is subjected to a centrifugation and shaking procedure, or a vibration and agitation procedure may be performed while the powder slurry is being introduced, and the solid body and the liquid high-solid content fine particle powder slurry are used by using a vibrating body bridge.

Page 10 1291893 V. Description of the invention (7) In addition, various types of slurry require concentration process parts due to differences in materials, sources, production parameters, and quality control, such as sludge dewatering, drug extraction, and powder synthesis to remove the solution. Mineral sorting, etc., and further solid and liquid separation or drying steps, after a semi-finished product after centrifugation, after stirring and shaking, it can be further centrifuged to further completely separate the solid and liquid, that is, the product desired in the process of the present process. , including powder and clear liquid. Thus, in the secondary solids and liquid separation process, if the concentration process is combined, at least one of the methods of sedimentation, filtration, and secondary centrifugation can be continued. The filtration can be a collection of pressure filtration or vacuum filtration.

The foregoing powder slurry material may include a collection of metals, ceramics, polymers, and composite materials. Since these types of powders have a solid-liquid mixed state and the same concentration problems are encountered, they are applicable to this method. In addition, during the above centrifugation, the centrifuge can be designed with a stirring device at the same time, or the centrifuge can be equipped with a vibrating device, or the centrifuge can be equipped with a stirring and shaking device. After one centrifugation, the mixing and shaking mixing is performed in situ, and the second centrifugation is repeated. This saves time and energy in the process and is conducive to automation.

The invention provides a method for manufacturing a high solid content particulate powder slurry, which is suitable for sludge dewatering, drug extraction, powder removal, solution removal and mineral sorting, etc., and reduces transportation cost, packaging, storage and subsequent process problems. Since heating and additives are not required, the slurry is not deteriorated and contaminated, so that the separation efficiency can be greatly increased, and a slurry having a higher solid content and a higher purity clarified liquid can be obtained, and stirring and vibration will be The homogenization of the powder is beneficial to reduce defects in subsequent processes, and has the advantages of quickness, simplicity, and high added value.

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Claims (1)

1291893 VI. Patent Application Range 1. A method for producing a high solid content particulate powder slurry by placing a fine particle powder slurry obtained by one centrifugation in a vibrating and stirring environment, and destroying the slurry in the slurry by vibration and agitation. The powder is bridged, and the solid and liquid are further separated by secondary centrifugation to obtain a high solid content particulate powder slurry. 2. The method for producing a high solids particulate fine powder slurry as described in claim 1, wherein the stirring and vibration energy are sequentially performed or stirred and vibrated at the same time. 3. The method for producing a high solids particulate fine powder slurry according to claim 1, wherein the solid and liquid separation procedure employs at least one of precipitation and filtration. 4. The method for producing a high solids particulate fine powder slurry according to claim 3, wherein in the solid and liquid separation procedure, the filtration may be a collection of pressure filtration or vacuum filtration. 5. The method for producing a high solids content fine particle slurry according to claim 1, wherein the powder slurry material comprises a collection of a metal, a ceramic, a polymer, and a composite material. 6. The method for producing a high solids particulate fine slurry according to claim 1, wherein the powder slurry agitating energy is a mixture of mechanical agitation, magnetic stirring and bubble agitation. 7. The method for producing a high solids content particulate powder slurry according to claim 1, wherein the vibration energy of the powder slurry is collected by mechanical eccentric vibration, reciprocating vibration and impact vibration. 8. A method for producing a high solid content particulate powder slurry, Page 13 1291893 VI. Patent application range When the particle powder slurry is subjected to a centrifugation process, the vibration and agitation procedures are simultaneously performed, the powder bridge in the slurry is destroyed by vibration and agitation, and the solid and liquid are further centrifuged. Further separation to obtain a high solids content particulate powder slurry. 9. The method for producing a high solid content particulate powder slurry according to claim 8, wherein the centrifuge can be simultaneously designed with a stirring and shaking device, and stirred in situ. Shaker. A method for producing a high solid content fine particle powder slurry according to claim 8, wherein the powder slurry agitation procedure uses a collection of mechanical agitation, magnetic agitation and bubble agitation. 1 1. The method for manufacturing a high solid content particulate powder slurry according to claim 8 of the patent application, which provides a collection of mechanical eccentric vibration, reciprocating vibration and impact vibration when the powder slurry vibration program is provided. . 1111 Page 14