CN-118702481-B - Preparation method of ceramic corundum abrasive based on alumina reclaimed material

Abstract

The invention belongs to the technical field of abrasive preparation, in particular to a method for preparing a ceramic corundum abrasive based on alumina reworked materials, which adopts scraps and waste residues of alumina abrasives such as fused corundum or ceramic corundum and the like as main raw materials, the alumina component in the original abrasive is reused through six steps of degreasing, de-ironing, desalting, grinding, drying, sintering and crushing, so that the ceramic corundum abrasive with performance superior to that of the fused white corundum is prepared, and the purposes of reducing solid waste emission and recycling resources are achieved. The regenerated ceramic corundum abrasive material prepared by the technology has low production cost, saves energy consumption, has little equipment investment and is environment-friendly.

Inventors

• ZHAI YUNPENG
• WANG ZHEN

Assignees

• 淄博四砂泰益研磨有限公司
• 四砂泰利莱(青岛)研磨股份有限公司

Dates

Publication Date

20260505

Application Date

20240710

Claims (6)

1. 1. The preparation method of the ceramic corundum abrasive based on the alumina reclaimed material is characterized by comprising the following steps of: 1) The method comprises the steps of carrying out oil removal and iron removal treatment on an alumina reclaimed material, wherein the oil removal and iron removal treatment is carried out by putting the alumina reclaimed material into a high-temperature kiln, controlling the supply amount of natural gas and air in the combustion heating process of the kiln to be 1:12-1:15, controlling the overall temperature of the kiln to be 950-1050 ℃, completely burning and decomposing oil stains in the alumina reclaimed material under the high-temperature oxygen-enriched condition, converting iron in the alumina reclaimed material into magnetic iron oxide, separating the magnetic iron oxide by an electromagnet, and removing iron, wherein the total content of iron in the alumina reclaimed material is lower than 3%; 2) Removing soluble salt from the alumina reclaimed material after degreasing and deironing; 3) Adding an auxiliary agent into the alumina reclaimed material for removing oil and iron and removing soluble salt, and grinding to obtain alumina powder, wherein the added auxiliary agent comprises 1-2% of Cr 2 O 3 , 0.5-1.5% of Na 3 AlF 6 and 3-5% of Y 2 O 3 by mass percent based on the weight of the alumina reclaimed material for removing oil and iron and removing soluble salt; 4) Drying and calcining the ground alumina powder; 5) And crushing and grading the calcined alumina coarse material to obtain the ceramic corundum abrasive.
2. 2. The method for preparing the ceramic corundum abrasive based on the alumina reclaimed material according to claim 1 is characterized in that when the iron content in the alumina reclaimed material is higher than 10%, the electromagnet is used for pre-removing iron.
3. 3. The method for preparing the ceramic corundum abrasive based on alumina reclaimed materials according to claim 1 is characterized in that the method for desalting by adopting a tap water soaking and flushing method in the step 2) is adopted, and the conductivity of tap water after desalting is measured to be less than 0.2S/m.
4. 4. The method for preparing the ceramic corundum abrasive based on alumina reclaimed materials according to claim 1 is characterized in that the particle size of the alumina powder after grinding in the step 3) is d50=1.0-1.5 μm.
5. 5. The method for preparing the ceramic corundum abrasive based on the alumina reclaimed material according to claim 1 is characterized in that the drying temperature in the step 4) is 60-80 ℃.
6. 6. The method for preparing the ceramic corundum abrasive based on alumina reclaimed materials according to claim 1 is characterized in that the calcining condition of the step 4) is 900-1000 ℃ for 1 hour, then the temperature is raised to 1450-1500 ℃ for 2 hours, and then the ceramic corundum abrasive is naturally cooled to room temperature.

Description

Preparation method of ceramic corundum abrasive based on alumina reclaimed material Technical Field The invention belongs to the technical field of abrasive preparation, and particularly relates to a preparation method of a ceramic corundum abrasive based on alumina reclaimed materials. Background Alumina corundum abrasive is one of the abrasive with the largest application amount in the current industrial manufacturing field. It has good mechanical property, high Wen Moxiao performance stability, relatively simple production and preparation, the price is much cheaper than that of the grinding materials such as diamond, silicon carbide and the like, and the demand is great in the processing application of steel workpieces. Corundum abrasive materials have been developed in great length, and play an irreplaceable role in various fields of automobile manufacturing, aerospace and the like. Currently, alumina abrasive in China is mainly made of fused white corundum and brown corundum by the traditional fused process. The electro-fused corundum is obtained by melting bauxite to form alpha-shaped alumina crystals by arc discharge at a high temperature of more than 3000 ℃, and then pouring the alumina crystals into water for cooling or naturally cooling the alumina crystals, and then crushing and grading the alumina crystals. The method has the advantages of high energy consumption, high operation requirement and high risk in the pouring process of the fused corundum, and the obtained corundum abrasive particles are mainly millimeter-grade particle aggregates, and have low grinding life due to the crystal-through fracture in the grinding use process. The broken scraps of the abrasive materials form waste residues, become one of industrial solid wastes, and the transportation treatment generates additional use cost. Compared with the fused corundum, the ceramic corundum abrasive material has the advantages that the ceramic corundum abrasive material is free from crystal-through fracture, a new grinding surface can be formed along with the falling of particles in the micro-area of the surface layer of the abrasive material in the grinding process, the self-sharpening property is good, and the service life is long. And the heat generated by grinding is taken away in large quantity along with the falling of the particles in the surface micro-area, so that the ablation of the processed object is not easy to occur. Based on the advantages, many domestic abrasive enterprises have also invested in the development of ceramic corundum abrasives, and have made great progress. For example, patent CN 116789459A of Qingdao Ruiki new material science and technology Co., ltd, patent CN 115140754B of Shandong rock corundum Co., ltd, patent CN 113845356B of Hunan Joseph technology Co., ltd, etc., which respectively prepare ceramic corundum abrasive materials by different ways from different raw materials. However, the materials for producing the fused corundum abrasive and the ceramic corundum abrasive are all products obtained from natural minerals or processed from natural minerals, are a type of consumption of non-renewable natural resources, and inevitably produce waste materials and waste residues after use, so that pollution is formed and special treatment is needed. Disclosure of Invention The invention aims to provide a preparation method of a ceramic corundum abrasive based on alumina reclaimed materials, which takes reclaimed materials (scrap waste) after the alumina abrasive is used as raw materials, and processes, sinters and breaks the reclaimed materials to prepare the ceramic corundum abrasive with service life longer than that of fused white corundum. The ceramic corundum abrasive prepared by the technology has low production cost, low energy consumption, less equipment investment and environmental friendliness, and can solve a part of waste solid treatment problems. The invention is realized by the following technical scheme: namely a preparation method of ceramic corundum abrasive based on alumina reclaimed materials, which is characterized by comprising the following steps: 1) Carrying out oil removal and iron removal treatment on the alumina reclaimed materials; 2) Removing soluble salt from the alumina reclaimed material after degreasing and deironing; 3) Adding an auxiliary agent into the alumina reclaimed material for removing oil, iron and soluble salt, and grinding to obtain alumina powder; 4) Drying and calcining the ground alumina powder; 5) And crushing and grading the calcined alumina coarse material to obtain the ceramic corundum abrasive. The alumina reclaimed material of the invention is recycled alumina abrasive slag, and can be any one or a mixture of two of fused corundum abrasive (fused corundum abrasive discarded after grinding use) and ceramic corundum abrasive (waste slag and scraps of ceramic corundum abrasive). Furthermore, when the iron content in the alumina reclaimed material is not highe