阅读说明：本技术 一种用于烧结锂电池正极材料专用匣钵及其制备方法 (Sagger special for sintering lithium battery positive electrode material and preparation method thereof ) 是由 张毅 贺辉华 于 2019-09-20 设计创作，主要内容包括：本发明提供一种用于烧结锂电池正极材料专用匣钵及其制备方法,属于耐火材料技术领域。所述的用于烧结锂电池正极材料专用匣钵,包括匣钵主体及匣钵主体底层设有与匣钵主体一体压制成型的耐腐蚀层,所述耐腐蚀层的厚度为2-3mm；所述耐腐蚀层包括铝镁尖晶石、电熔刚玉、氧化锆粉、高岭土粉、氧化铝粉、粘结剂、水；所述匣钵主体包括堇青石、烧结莫来石、氧化铝粉、高岭土粉、粘结剂、水。本发明在普通匣钵的内部底层增设一层耐腐蚀层,使得本发明的匣钵相对于普通匣钵的生产成本仅提高10-15％,而使用次数相对于普通匣钵可以提高2倍以上。(The invention provides a sagger special for sintering a lithium battery positive electrode material and a preparation method thereof, belonging to the technical field of refractory materials. The sagger special for sintering the lithium battery anode material comprises a sagger main body and a corrosion-resistant layer which is integrally pressed and formed with the sagger main body is arranged on the bottom layer of the sagger main body, and the thickness of the corrosion-resistant layer is 2-3 mm; the corrosion-resistant layer comprises aluminum magnesium spinel, fused corundum, zirconia powder, kaolin powder, alumina powder, a binder and water; the sagger main body comprises cordierite, sintered mullite, alumina powder, kaolin powder, a binder and water. According to the invention, the corrosion-resistant layer is additionally arranged on the bottom layer in the common sagger, so that the production cost of the sagger is only increased by 10-15% compared with that of the common sagger, and the use frequency of the sagger can be increased by more than 2 times compared with that of the common sagger.)

1. A sagger special for sintering a lithium battery anode material is characterized by comprising a sagger main body and a corrosion-resistant layer which is integrally pressed and formed with the sagger main body and is arranged on the bottom layer of the sagger main body, wherein the thickness of the corrosion-resistant layer is 2-3 mm.

2. the sagger special for sintering a lithium battery positive electrode material as claimed in claim 1, wherein the corrosion-resistant layer comprises the following raw materials: 20-30% of aluminum-magnesium spinel, 15-25% of fused corundum, 10-20% of zirconia powder, 10-15% of kaolin powder, 20-25% of alumina powder, 2-5% of binder and 5-7% of water.

3. The sagger special for sintering a lithium battery positive electrode material as claimed in claim 1, wherein the sagger main body comprises the following raw materials: 25-35% of cordierite, 27-38% of sintered mullite, 10-15% of alumina powder, 15-20% of kaolin powder, 2-5% of a binder and 5-7% of water.

4. the sagger special for sintering the lithium battery positive electrode material as claimed in claim 2, wherein the particle size of the aluminum magnesium spinel is 0.1-1.5mm, the particle size of the fused corundum is 0.1-1.0mm, the particle size of the zirconia powder is 325 meshes, the particle size of the kaolin powder is 325 meshes, and the particle size of the alumina powder is 5 μ.

5. the sagger special for sintering the lithium battery positive electrode material as claimed in claim 3, wherein the grain size of cordierite is 0.5-1.0mm, the grain size of sintered mullite is 0.1-1.3mm, the grain size of alumina powder is 5 μ, and the grain size of kaolin powder is 325 meshes.

6. the method for preparing the sagger special for sintering the positive electrode material of the lithium battery as claimed in any one of claims 1 to 5, comprising the steps of:

S1: weighing the corrosion-resistant layer raw materials of aluminum-magnesium spinel, fused corundum, zirconia powder, kaolin powder, alumina powder and a binder in proportion, putting the materials into a mixer, adding water, and uniformly stirring to prepare a corrosion-resistant raw material for later use;

s2: weighing main layer raw materials including cordierite, sintered mullite, alumina powder, kaolin powder and a binder in proportion, putting the main layer raw materials into a mixer, adding water, and uniformly stirring to prepare a sagger main body raw material for later use;

S3: uniformly screening the corrosion-resistant raw materials to the bottom of a mold, wherein the thickness of the corrosion-resistant raw materials is 2-3mm, then putting the sagger main body material into the mold, and performing pressure molding by using a hydraulic press with the volume of 800 plus 1000 tons to ensure that the corrosion-resistant material is positioned at the bottom of a sagger blank;

S4: and (3) feeding the sagger blank formed by pressing into a dryer for drying to remove moisture, and then placing the dried sagger blank into an automatic kiln for firing for 20 hours at the high temperature of 1400 ℃ to obtain a sagger finished product.

Technical Field

The invention belongs to the technical field of refractory materials, and particularly relates to a sagger special for sintering a lithium battery positive electrode material and a preparation method thereof.

Background

Because the lithium cobaltate, the lithium manganate and the ternary lithium which are used as the anode materials of the lithium battery need to be roasted at the high temperature of about 1000 ℃, and have strong corrosivity, the pH value of the anode material is greater than 11, and the anode material has strong alkalinity, a sagger for burning the raw materials needs to have special performances of high temperature resistance and corrosion resistance. The common sagger supplied at home and abroad at present is produced by taking cordierite and mullite as main raw materials, although the price is lower, the common sagger is less in use frequency and quick to scrap, and is easy to cause pollution to anode materials; the sagger made of the raw materials containing zirconium and corundum has high cost which is more than 3 times of the price of the common sagger, and the production cost is increased for anode material manufacturers.

disclosure of Invention

The invention provides a sagger special for sintering a lithium battery positive electrode material and a preparation method thereof, aiming at solving the technical problems that the sagger made of common materials in the prior art is few in use times and the sagger made of corrosion-resistant materials is high in cost.

in order to achieve the purpose, the technical solution of the invention is as follows:

A sagger special for sintering a lithium battery anode material comprises a sagger main body and a corrosion-resistant layer which is arranged on the bottom layer of the sagger main body and is integrally pressed and formed with the sagger main body, wherein the thickness of the corrosion-resistant layer is 2-3 mm.

Preferably, the corrosion-resistant layer comprises the following raw materials: 20-30% of aluminum-magnesium spinel, 15-25% of fused corundum, 10-20% of zirconia powder, 10-15% of kaolin powder, 20-25% of alumina powder, 2-5% of binder and 5-7% of water.

preferably, the sagger body comprises the following raw materials: 25-35% of cordierite, 27-38% of sintered mullite, 10-15% of alumina powder, 15-20% of kaolin powder, 2-5% of a binder and 5-7% of water. Wherein the binder is a special binder commonly used in the field.

Preferably, the particle size of the aluminum-magnesium spinel is 0.1-1.5mm, the particle size of the fused corundum is 0.1-1.0mm, the particle size of the zirconia powder is 325 meshes, the particle size of the kaolin powder is 325 meshes, and the particle size of the alumina powder is 5 mu.

Preferably, the grain size of the cordierite is 0.5-1.0mm, the grain size of the sintered mullite is 0.1-1.3mm, the grain size of the alumina powder is 5 mu, and the grain size of the kaolin powder is 325 meshes.

A preparation method of a special sagger for sintering a lithium battery positive electrode material comprises the following steps:

S1: weighing the corrosion-resistant layer raw materials of aluminum-magnesium spinel, fused corundum, zirconia powder, kaolin powder, alumina powder and a binder in proportion, putting the materials into a mixer, adding water, and uniformly stirring to prepare a corrosion-resistant raw material for later use;

S2: weighing main layer raw materials including cordierite, sintered mullite, alumina powder, kaolin powder and a binder in proportion, putting the main layer raw materials into a mixer, adding water, and uniformly stirring to prepare a sagger main body raw material for later use;

s3: uniformly screening the corrosion-resistant raw materials to the bottom of a mold, wherein the thickness of the corrosion-resistant raw materials is 2-3mm, then putting the sagger main body material into the mold, and performing pressure molding by using a hydraulic press with the volume of 800 plus 1000 tons to ensure that the corrosion-resistant material is positioned at the bottom of a sagger blank;

S4: and (3) feeding the sagger blank formed by pressing into a dryer for drying to remove moisture, and then placing the dried sagger blank into an automatic kiln for firing for 20 hours at the high temperature of 1400 ℃ to obtain a sagger finished product.

The invention has the beneficial effects that:

1. According to the invention, the corrosion-resistant layer is additionally arranged on the bottom layer in the common sagger, and the formula of the corrosion-resistant layer is obtained through years of experience and numerous experiments of an inventor, so that the production cost of the sagger disclosed by the invention is increased by 10-15% compared with that of the common sagger, and the use frequency of the sagger can be increased by more than 2 times compared with that of the common sagger.

2. The sagger body and the corrosion-resistant layer adopt different raw material formulas, so that the using times of the sagger are ensured, the manufacturing cost of the sagger is reduced, and the sagger has very high economic value.

drawings

FIG. 1 is a cross-sectional view of a sagger of the present invention.

In the figure: 1-a bottom layer of a sagger body; 2-corrosion resistant layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1, the sagger special for sintering the lithium battery anode material comprises a sagger main body, wherein a bottom layer 1 of the sagger main body is provided with a corrosion-resistant layer 2 which is integrally pressed and formed with the sagger main body, and the thickness of the corrosion-resistant layer 2 is 2-3 mm.