CN-122006861-A - Metal fused casting particle ceramic grinding ball/grinding forging for ball mill and manufacturing method thereof

Abstract

The invention discloses a metal casting particle ceramic grinding ball/grinding forging for a ball mill and a manufacturing method thereof, belonging to the technical field of grinding equipment. The grinding ball/grinding forging comprises a wear-resistant metal matrix (1) and a particle ceramic polymer (2) wrapped outside the wear-resistant metal matrix. The granular ceramic polymer (2) is formed by mixing granular ceramic, high-temperature adhesive and ferroalloy powder and reinforcing built-in steel wires (22). During manufacturing, the EPS foam mould is used for preparing the particle ceramic polymer shell with a certain thickness and holes, then the particle ceramic polymer shell is placed in a casting mould, high-temperature molten metal is poured into the casting mould, and the casting infiltration principle is utilized for penetrating the high-temperature molten metal into the holes of the particle ceramic polymer shell, so that a firm metal-based ceramic composite structure is formed. The invention combines the high-strength high-toughness impact-resistant metal matrix with the high-hardness particle ceramic layer, realizes low abrasion, low ball breaking rate and high wear resistance, has simple process and low cost, and is suitable for large-scale production.

Inventors

• MAO KE

Assignees

• 贵州优拓节能装备制造有限公司

Dates

Publication Date

20260512

Application Date

20260213

Claims (5)

1. 1. The metal casting particle ceramic grinding ball/grinding forging for the ball mill is characterized by comprising a matrix (1) formed by wear-resistant metal and a particle ceramic polymer (2) wrapped on the outer surface of the matrix (1), wherein the particle ceramic polymer (2) is formed by mixing and solidifying particle ceramic (21), a high-temperature adhesive and ferroalloy powder, and reinforcing steel wires (22) are embedded in the mixed material, the weight percentage of the particle ceramic (21) is 80-95%, the weight percentage of the high-temperature adhesive is 5-10%, and the weight percentage of the ferroalloy powder is 2-10%.
2. 2. A metal casting particle ceramic grinding ball/grinding forging for a ball mill according to claim 1, wherein the wear-resistant metal of the wear-resistant metal matrix (1) is silicon-manganese alloy steel, chromium-molybdenum alloy steel, alloy spheroidal graphite cast iron or chromium white cast iron, the hardness is HRC 30-65, and the impact toughness is 5-40J/cm <2 >.
3. 3. A metal fused cast particulate ceramic grinding ball/grinding and forging for a ball mill according to claim 1 or 2, characterized in that the particle diameter of the particulate ceramic (21) in the particulate ceramic polymer (2) is 1 to 5mm, and the layer thickness of the particulate ceramic polymer (2) is 5 to 50mm.
4. 4. A metal fused cast particulate ceramic grinding ball/grinding forging for a ball mill according to claim 3, wherein the particulate ceramic (21) is one or a combination of any one of alumina (Al 2 O 3 ) ceramic, zirconia (ZrO 2 ) ceramic, titanium carbide (TiC) ceramic and Zirconia Toughened Alumina (ZTA) ceramic, and has a hardness of HRA 70-95.
5. 5. A manufacturing method of metal fused casting particle ceramic grinding balls/grinding forging for a ball mill comprises the following steps: S1, preparing a mould, namely preparing an EPS (expandable polystyrene) foam hemispherical/semi-cylindrical mandrel (3) with the diameter smaller than the diameter of a target grinding ball/grinding forging by adopting a foaming forming process, and foaming and forming an EPS foam hemispherical/semi-cylindrical outer mould (4) according to the diameter of the grinding ball, wherein a plurality of reinforced steel wires (22) are crossly arranged in a cavity between the hemispherical/semi-cylindrical mandrel (3) and the hemispherical/semi-cylindrical outer mould; S2, proportioning and mixing, namely uniformly mixing 80-95% of granular ceramic (21) with the particle size of phi 1-5 mm, 5-10% of high-temperature adhesive and 2-10% of ferroalloy powder with the particle size of 300-600 meshes, wherein the high-temperature adhesive is one of inorganic copper oxide-based high-temperature adhesive, sodium silicate high-temperature adhesive, potassium silicate high-temperature adhesive, phenolic resin, silica sol or aluminum sol; s3, preparing a polymer, namely filling the mixture uniformly mixed in the step S2 into cavities of a hemispherical/semi-cylindrical core mold (3) and a hemispherical/semi-cylindrical outer mold (4), standing for 1-3 days at room temperature, and demolding to obtain a hemispherical/semi-cylindrical particle ceramic polymer (2) with the thickness of 5-25 mm; s4, dehydration treatment, namely baking the hemispherical/semicircular tubular particle ceramic polymer (2) in an oven at 100-300 ℃ for 5-48 hours for dehydration so as to remove water and part of organic matters and improve the high-temperature resistance strength of the particle ceramic polymer; S5, assembling a die, namely folding two dehydrated semispherical shell-shaped/semicircular tubular granular ceramic polymers (2) into a complete spherical shell/tube shell, and placing the complete spherical shell/tube shell into a sand mold or a metal mold cavity for casting grinding balls/grinding forging; s6, smelting and compounding, namely preparing and smelting wear-resistant metal alloy according to the component requirement, pouring high-temperature wear-resistant metal liquid with the temperature higher than the conventional casting temperature of 20-100 ℃ into a sand mold or a metal mold cavity for casting grinding balls/grinding forging, wherein the particle size of the particle ceramic (21) is phi 1-5 mm, and the prepared spherical/circular tubular particle ceramic polymer (2) is provided with fine pores and capillary pipelines, so that the high-temperature metal liquid can be cast and infiltrated into the pores of the particle ceramic polymer (2) containing the particle ceramic (21) and the iron alloy powder along the pores and the capillary pipelines during casting, and high-strength combination of the wear-resistant metal and the particle ceramic is realized with the help of the iron alloy powder; And S7, post-treatment, namely, after the casting is cooled and solidified, sand cleaning and polishing are carried out on the blank, and heat treatment is carried out according to the performance requirement of wear-resistant metal, so as to obtain the fused casting particle ceramic grinding ball/grinding forging product with compact metal structure and excellent performance.

Description

Metal fused casting particle ceramic grinding ball/grinding forging for ball mill and manufacturing method thereof Technical Field The invention relates to the technical field of grinding equipment, in particular to a metal fused cast particle ceramic grinding ball/grinding forging for a ball mill, and also relates to a manufacturing method of the metal fused cast particle ceramic grinding ball/grinding forging for the ball mill. Background The ball mill is used as a key device for material crushing, is widely applied to industries such as mineral separation, metallurgy, building materials, thermal power, chemical industry and the like, and the working principle of the ball mill mainly depends on the impact and grinding action of core grinding media (such as grinding balls and grinding forging) in a cylinder body on materials in the rotating process. Therefore, the performance of the grinding medium directly affects the grinding efficiency, energy consumption and product quality of the ball mill. The grinding medium has the main functions of 1, crushing and grinding, namely, the grinding balls freely fall after rotating to a certain height along with the cylinder body under the action of centrifugal force to generate impact force on materials to realize coarse crushing, meanwhile, sliding and rolling friction among the grinding balls further grind the materials into fine powder, 2, controlling the flow rate of the materials, adjusting the stay time of the materials in the cylinder body by the grading (combination of different sizes) of the grinding balls, optimizing grinding efficiency, 3, adapting to different process requirements, requiring corrosion-resistant materials (such as stainless steel balls) during wet grinding, paying attention to wear resistance (such as high-chromium cast iron balls), and 4, requiring porcelain balls without iron pollution in special scenes such as ceramic production. The grinding balls/grinding forging are classified according to the prior materials, mainly comprise ceramic balls and metal grinding balls/grinding forging, the ceramic balls have low density and no metal pollution, and are suitable for finely grinding food, medicines or high-purity materials (such as electronic ceramics), and the metal grinding balls with the widest application range and the largest use quantity at present comprise common alloy steel balls, stainless steel balls, low-alloy cast iron balls, high-chromium cast iron balls and the like. The common alloy steel ball has low hardness and good toughness, is suitable for grinding common ores and cements, has strong corrosion resistance and low hardness, is used for wet ore dressing or chemical material treatment, has low cost and lower hardness (HRC is more than or equal to 45), is mainly used in the primary crushing stage, has high-chromium cast iron ball (Cr is more than or equal to 10%), has high hardness (more than or equal to 58 HRC), has good wear resistance, has low toughness, and is suitable for hard materials (such as quartz sand) and dry production (cement factories). The high-chromium cast iron balls have high ball breaking rate due to low toughness, and the high ball repairing quantity in production is consumed greatly, and meanwhile, the quality of products in the process can be influenced when a large amount of worn iron powder is mixed into the discharge. China patent application No. 202110180993 discloses a production system and a production method of a metal-based composite ceramic steel ball, wherein high-temperature molten steel and ceramic particles are cast into a die cavity together through a casting pipeline, and as the density of the ceramic particles (3.6 kg/cm <3 >) is lower than that of the high-temperature molten steel (7.85 kg/cm <3 >), the ceramic particles in the die cavity are enriched and float on the upper part of the high-temperature molten steel, the ceramic particles in the upper and lower parts of the die cavity are unevenly distributed after the high-temperature molten steel is cooled and solidified, the overall hardness of the steel ball is uneven, so that the steel ball is easy to wear and lose circles in use, and the wear resistance is unstable. The Chinese patent application No. CN201710038302 discloses a preparation method of a ceramic-metal composite wear-resistant grinding ball, which adopts a method of combining a three-dimensional digital modeling technology and laser selective area cladding to prepare a spherical ceramic particle prefabricated body with a certain wall thickness and honeycomb holes, after the ceramic-metal composite grinding ball is cast and molded, the working surface of the grinding ball is provided with the ceramic honeycomb holes, then a ball mill is added to carry out point contact wear between the grinding ball and between the grinding ball and a lining plate when the grinding ball is used for grinding materials, the ceramic-metal composite grinding ball is inevitably worn at the ce