Iron oxide red dyed ceramic grinding wheel and preparation process thereof

Abstract

The application discloses a kind of iron oxide red dyeing ceramic grinding wheel and its preparation process, wherein, iron oxide red dyeing ceramic grinding wheel includes the following components according to weight parts: abrasive 90-120 parts, ceramic binder 10-28 parts, iron oxide red 0.2-1 part, temporary adhesive 0.5~2 parts, and wetting agent 2~5 parts, the temporary adhesive is hydroxypropyl methyl cellulose, the wetting agent is polyquaternary ammonium salt aqueous solution, and the concentration of polyquaternary ammonium salt aqueous solution is 0.5%~5%.The application prevents the aggregation and sedimentation of iron oxide red particles by the electrostatic effect and physical barrier effect of polyquaternary ammonium salt, so that the stability of the whole mixed liquid system can be maintained for a long time, which is beneficial to the uniform dispersion of iron oxide red particles;hydroxypropyl methyl cellulose has strong water retention, which can avoid cracking and other problems caused by excessive temperature difference and rapid water evaporation during the heating and drying process of grinding wheel blank.

Description

Technical Field

[0001] This invention relates to the field of ceramic grinding wheel manufacturing technology, and in particular to an iron oxide red dyed ceramic grinding wheel and its preparation process. Background Technology

[0002] Iron oxide red is commonly used as a colorant and additive in ceramic grinding wheels. It can dye ceramic grinding wheels brownish-red to orange-red, masking certain appearance defects and making the wheels more aesthetically pleasing and easily distinguishable. Furthermore, the presence of iron oxide red can increase the toughness of ceramic grinding wheels, and in fine-grained ceramic grinding wheels, it can play a certain auxiliary grinding role and increase the wear resistance of the grinding wheel.

[0003] However, due to the limitations of existing grinding wheel matching and processing technology, it is currently difficult to make iron oxide red evenly dispersed during the preparation of ceramic grinding wheels. Therefore, it is easy to generate agglomeration in the finished grinding wheel, resulting in problems such as iron spots and color difference, which affect the appearance of the grinding wheel and the grinding effect. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention aims to provide an iron oxide red dyed ceramic grinding wheel and its preparation process, which has the advantages of reducing appearance defects, improving the strength of ceramic grinding wheels and grinding performance.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] According to a first aspect of the disclosed embodiments of the present invention, an iron oxide red dyed ceramic grinding wheel is provided, comprising the following components by weight:

[0007] The mixture contains 90-120 parts abrasive, 10-28 parts ceramic binder, 0.2-1 part iron oxide red, 0.5-2 parts temporary binder, and 2-5 parts wetting agent.

[0008] In some exemplary embodiments, the temporary adhesive is hydroxypropyl methylcellulose.

[0009] In some exemplary embodiments, the wetting agent is an aqueous solution of a polyquaternary ammonium salt, and the concentration of the aqueous solution of the polyquaternary ammonium salt is 0.5% to 5%.

[0010] In some exemplary embodiments, the ceramic binder comprises 45wt%-65wt% SiO2, 5wt%-15wt% B2O3, 10wt%-20wt% Al2O3, and 10wt%-20wt% alkali metal oxides and / or alkaline earth metal oxides.

[0011] According to a second aspect of the embodiments disclosed in this invention, a process for preparing an iron oxide red dyed ceramic grinding wheel is provided, comprising:

[0012] S10. Take the following components by weight as processing raw materials: 90-120 parts of abrasive, 10-28 parts of ceramic binder, 0.2-1 parts of iron oxide red, 0.5-2 parts of hydroxypropyl methylcellulose, and 2-5 parts of polyquaternium salt aqueous solution, wherein the concentration of polyquaternium salt aqueous solution is 0.5%-5%.

[0013] S20. Grind and mix all the raw materials thoroughly to obtain a mixed intermediate material;

[0014] S30. Using a forming press, the press turntable is controlled to rotate at a speed of 35-45 r / min to spread and form the mixed intermediate material to obtain a grinding wheel blank;

[0015] S40. The grinding wheel blank is subjected to natural static and heat drying treatment to obtain a polished grinding wheel blank.

[0016] S50. The grinding wheel blank is sintered at a temperature of 1000-1100°C under an oxidizing atmosphere to obtain a grinding wheel blank.

[0017] S60. The grinding wheel blank is processed according to the process parameters to obtain the finished grinding wheel.

[0018] In some exemplary embodiments, step S20 specifically includes:

[0019] S21. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain the first mixture for later use.

[0020] S22. After thoroughly grinding the polyquaternium salt aqueous solution and iron oxide red, the mixture is sieved through an F200 mesh sieve to obtain a second mixture for later use.

[0021] S23. Using a twin-spiral countercurrent mixer, first thoroughly stir the abrasive and the second mixture for 3-4 minutes, then add the first mixture and continue to thoroughly stir for 4-6 minutes until all the raw materials are fully mixed.

[0022] In some exemplary embodiments, step S40 specifically includes:

[0023] After the grinding wheel blank is left to stand naturally for 12 to 24 hours, it is heated and dried at 60 to 80°C for 2 to 12 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank.

[0024] In some exemplary embodiments, step S50 specifically includes:

[0025] Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 450-550℃ at a rate of 1-2℃ / min and held for 4-6 hours, then heated to 1000-1100℃ at a rate of 1-1.5℃ / min and sintered for 6-8 hours to obtain the grinding wheel blank.

[0026] In some exemplary embodiments, the preparation process further includes:

[0027] S70. The waste liquid generated during the preparation of ceramic grinding wheels is mixed with polyacrylamide for purification treatment, wherein the waste liquid is mixed in a ratio of 100 parts by weight to 2-10 parts by weight of polyacrylamide.

[0028] In some exemplary embodiments, S70 specifically includes:

[0029] By weight, 100 parts of the waste liquid generated during the preparation of ceramic grinding wheels are thoroughly mixed with 2-10 parts of polyacrylamide. After standing for 6-12 hours until complete sedimentation, the mixture is directly filtered and separated.

[0030] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0031] This invention employs a ceramic grinding wheel for dyeing iron oxide red and its preparation process. By using a 0.5% to 5% concentration of polyquaternium salt aqueous solution as a wetting agent, and thoroughly grinding it with iron oxide red, the problems of foaming and difficulty in sieving caused by conventional dextrin solution, water glass, and other wetting agents can be avoided. Furthermore, polyquaternium salt is a cationic polymer, and when added in an appropriate amount, it can act as a dispersant, preventing the aggregation and sedimentation of iron oxide red particles through electrostatic and physical barrier effects. This allows the entire mixture system to remain stable for a longer period of time, which is beneficial for the uniform dispersion of iron oxide red particles.

[0032] Using hydroxypropyl methylcellulose as a temporary binder provides excellent adhesion, which can compensate for the lack of viscous wetting agents such as dextrin and water glass, thus reducing the impact on the green strength. In addition, hydroxypropyl methylcellulose has strong water retention, which can prevent cracking of the grinding wheel blank during the heating and drying process due to excessive temperature difference and rapid moisture evaporation.

[0033] Meanwhile, in the ceramic grinding wheel preparation process of the present invention, by forming the first mixture and the second mixture in sequence, and then fully mixing the abrasive with the first mixture and the second mixture in sequence, the iron oxide red is dispersed more evenly. This can avoid the problems of agglomerated iron spots and color difference that are easily caused by directly adding iron oxide red powder during the mixing process, and reduce appearance defects, improve the strength and grinding performance of the ceramic grinding wheel.

[0034] Using polyacrylamide as a flocculant for iron oxide red in the treatment of processing wastewater allows for direct filtration and separation after static sedimentation, avoiding direct discharge that pollutes the environment and aligning with the development concept of green manufacturing. Polyacrylamide is a linear polymer with long molecular chains, which can adsorb iron oxide red particles in aqueous solution, forming larger flocs, thereby achieving sedimentation and filtration separation. This flocculation effect usually requires specific pH conditions. By adjusting the pH and concentration, a small amount of polyquaternary ammonium salt in the ceramic grinding wheel preparation wastewater can also act as a coagulant aid, further improving the flocculation and sedimentation effect. Attached Figure Description

[0035] Figure 1 The present invention describes the process flow for preparing the iron oxide red dyed ceramic grinding wheel in this embodiment. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] The first aspect of the present invention provides an iron oxide red dyed ceramic grinding wheel, comprising the following components by weight: 90-120 parts abrasive, 10-28 parts ceramic binder, 0.2-1 parts iron oxide red, 0.5-2 parts temporary binder, and 2-5 parts wetting agent.

[0038] Specifically, the abrasive particle size is usually selected as 30-100 mesh, and the abrasive can be corundum-type abrasive, such as one or more of white corundum, brown corundum, chromium corundum, single crystal corundum, and ceramic microcrystalline corundum.

[0039] The ceramic binder comprises 45wt%-65wt% SiO2, 5wt%-15wt% B2O3, 10wt%-20wt% Al2O3, and 10wt%-20wt% alkali metal oxides and / or alkaline earth metal oxides. The ceramic binder, composed of multiple metal oxides, undergoes oxidation after mixing, which improves the strength of the grinding wheel blank. Furthermore, the ceramic binder readily bonds with temporary adhesives, ensuring the grinding wheel blank meets strength requirements. Simultaneously, the ceramic binder, composed of the aforementioned multiple metal oxides, exhibits high strength at low temperatures, thus meeting the rotational strength requirements of the ceramic grinding wheel.

[0040] The temporary adhesive is hydroxypropyl methylcellulose (HMCMC), a nonionic cellulose ether. It is a white, odorless, and tasteless powder, soluble in water and most polar organic solvents, as well as appropriate proportions of ethanol / water, propanol / water, and dichloroethane. It is insoluble in ether, acetone, and anhydrous ethanol. In cold water, it swells to form a clear or slightly turbid colloidal solution. Its aqueous solution exhibits surface activity, high transparency, and stable performance. HMCMC also possesses thermogel properties; its aqueous solution forms a gel upon heating and dissolves upon cooling. Solubility varies with viscosity; lower viscosity results in higher solubility. Its solubility in water is unaffected by pH. HMCMC exhibits thickening ability, good salt rejection, pH stability, water retention, dimensional stability, excellent film-forming properties, and broad-spectrum enzyme resistance, dispersibility, and adhesiveness.

[0041] The wetting agent is an aqueous solution of polyquaternium salt, with a concentration of 0.5% to 5%.

[0042] This invention uses a 0.5%–5% concentration of polyquaternium salt aqueous solution as a wetting agent. When this solution is thoroughly and uniformly ground with iron oxide red, it avoids the foaming and other difficulties in sieving that are caused by conventional dextrin solutions and water glass wetting agents. Furthermore, polyquaternium salt is a cationic polymer, and when added in an appropriate amount, it can act as a dispersant, preventing the aggregation and sedimentation of iron oxide red particles through electrostatic and physical barrier effects. This helps maintain the stability of the entire mixture system for a longer period of time, which is beneficial for the uniform dispersion of iron oxide red particles. Hydroxypropyl methylcellulose is used as a temporary binder. It has strong binding properties, which can compensate for the impact on green strength caused by the lack of viscous wetting agents such as dextrin solutions and water glass. At the same time, hydroxypropyl methylcellulose has strong water retention, which can prevent cracking of the grinding wheel blank during the heating and drying process due to excessive temperature difference and rapid moisture evaporation.

[0043] A second aspect of the present invention also provides a process for preparing an iron oxide red dyed ceramic grinding wheel, comprising:

[0044] S10. The following components are taken as processing raw materials by weight: 90-120 parts of abrasive, 10-28 parts of ceramic binder, 0.2-1 parts of iron oxide red, 0.5-2 parts of hydroxypropyl methylcellulose, and 2-5 parts of polyquaternium salt aqueous solution, wherein the concentration of polyquaternium salt aqueous solution is 0.5%-5%.

[0045] S20. Grind and mix all the raw materials thoroughly to obtain a mixed intermediate material.

[0046] Specifically, step S20 includes:

[0047] S21. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain the first mixture for later use.

[0048] S22. After thoroughly grinding the polyquaternium salt aqueous solution and iron oxide red, the mixture is sieved through an F200 mesh sieve to obtain a second mixture for later use.

[0049] S23. Using a twin-spiral countercurrent mixer, first thoroughly stir the abrasive and the second mixture for 3-4 minutes, then add the first mixture and continue to thoroughly stir for 4-6 minutes until all the raw materials are fully mixed.

[0050] S30. Using a forming press, the press turntable is controlled to rotate at a speed of 35-45 r / min to spread and form the mixed intermediate material to obtain a grinding wheel blank.

[0051] S40. The grinding wheel blank is subjected to natural standing and heating drying treatment to obtain a polished grinding wheel blank. Specifically, the grinding wheel blank is naturally stood for 12 to 24 hours, and then fully heated and dried at 60 to 80°C for 2 to 12 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank. The specific standing and heating drying time can be distinguished according to the grinding wheel grit size and size specifications.

[0052] S50. The grinding wheel blank is sintered at a temperature of 1000-1100℃ under an oxidizing atmosphere to obtain a grinding wheel blank. Specifically, under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 450-550℃ at a rate of 1-2℃ / min and held for 4-6 hours, and then heated to 1000-1100℃ at a rate of 1-1.5℃ / min and sintered for 6-8 hours to obtain a grinding wheel blank.

[0053] S60. The grinding wheel blank is processed according to the process parameters to obtain the finished grinding wheel.

[0054] S70. The waste liquid generated during the preparation of ceramic grinding wheels is mixed with polyacrylamide for purification treatment, wherein the waste liquid is mixed in a ratio of 100 parts by weight to 2-10 parts by weight of polyacrylamide.

[0055] The specific processing procedure is as follows:

[0056] By weight, 100 parts of the waste liquid generated during the preparation of ceramic grinding wheels are thoroughly mixed with 2-10 parts of polyacrylamide. After standing for 6-12 hours until complete sedimentation, the mixture is directly filtered and separated.

[0057] In the ceramic grinding wheel preparation process of the present invention, by forming a first mixture and a second mixture in sequence, and then fully mixing the abrasive with the first mixture and the second mixture in sequence, the iron oxide red is more evenly dispersed. This can avoid the problems of agglomeration iron spots and color difference that are easily caused by directly adding iron oxide red powder during the mixing process, and reduce appearance defects, improve the strength and grinding performance of the ceramic grinding wheel.

[0058] Using polyacrylamide as a flocculant for iron oxide red in the treatment of processing wastewater allows for direct filtration and separation after static sedimentation, avoiding direct discharge that pollutes the environment and aligning with the development concept of green manufacturing. Polyacrylamide is a linear polymer with long molecular chains, which can adsorb iron oxide red particles in aqueous solution, forming larger flocs, thereby achieving sedimentation and filtration separation. This flocculation effect usually requires specific pH conditions. By adjusting the pH and concentration, a small amount of polyquaternary ammonium salt in the ceramic grinding wheel preparation wastewater can also act as a coagulant aid, further improving the flocculation and sedimentation effect.

[0059] See the following examples for details:

[0060] Example 1

[0061] A ceramic grinding wheel dyed with iron oxide red comprises the following components by weight: 90 parts abrasive, 10 parts ceramic binder, 0.2 parts iron oxide red, 0.5 parts hydroxypropyl methylcellulose, and 2 parts polyquaternium salt aqueous solution, wherein the concentration of the polyquaternium salt aqueous solution is 0.5%, and the ceramic binder comprises 45 wt% SiO2, 15 wt% B2O3, 20 wt% Al2O3, and 20 wt% alkali metal oxide and / or alkaline earth metal oxide.

[0062] The specific preparation process of this type of iron oxide red dyed ceramic grinding wheel includes:

[0063] S10. The following components are taken as processing raw materials by weight: 90 parts abrasive, 10 parts ceramic binder, 0.2 parts iron oxide red, 0.5 parts hydroxypropyl methylcellulose, and 2 parts polyquaternium salt aqueous solution with a concentration of 0.5%.

[0064] S20. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain a first mixture for later use. Then, the polyquaternary ammonium salt aqueous solution and iron oxide red are thoroughly ground and sieved through an F200 mesh sieve to obtain a second mixture for later use. Finally, using a twin-screw countercurrent mixer, the abrasive and the second mixture are thoroughly stirred for 3 minutes, and then the first mixture is added and stirred thoroughly for another 4 minutes until all the raw materials are thoroughly mixed.

[0065] S30. Using a forming press, the press turntable is controlled to rotate at 35 r / min to spread and form the mixed intermediate material to obtain a grinding wheel blank.

[0066] S40. After the grinding wheel blank is left to stand naturally for 12 hours, it is heated and dried at 60°C for 3 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank.

[0067] S50. Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 450℃ at a rate of 1℃ / min and held for 4-6 hours, then heated to 1000℃ at a rate of 1℃ / min and sintered for 6 hours to obtain the grinding wheel blank.

[0068] S60. The grinding wheel blank is processed according to the process parameters to obtain the finished grinding wheel.

[0069] S70. Mix 100 parts by weight of the waste liquid generated during the preparation of ceramic grinding wheels with 2 parts by weight, stir thoroughly, let stand for 6 hours until complete sedimentation, and then filter and separate directly.

[0070] Example 2

[0071] A ceramic grinding wheel dyed with iron oxide red comprises the following components by weight: 90 parts abrasive, 18 parts ceramic binder, 0.5 parts iron oxide red, 1 part hydroxypropyl methylcellulose, and 3 parts polyquaternium salt aqueous solution, wherein the concentration of the polyquaternium salt aqueous solution is 1%, and the ceramic binder comprises 55 wt% SiO2, 10 wt% B2O3, 15 wt% Al2O3, and 20 wt% alkali metal oxide and / or alkaline earth metal oxide.

[0072] The specific preparation process of this type of iron oxide red dyed ceramic grinding wheel includes:

[0073] S10. The following components are taken as processing raw materials by weight: 90 parts abrasive, 18 parts ceramic binder, 0.5 parts iron oxide red, 1 part hydroxypropyl methylcellulose, and 3 parts polyquaternium salt aqueous solution, the concentration of which is 1%.

[0074] S20. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain a first mixture for later use. Then, the polyquaternary ammonium salt aqueous solution and iron oxide red are thoroughly ground and sieved through an F200 mesh sieve to obtain a second mixture for later use. Finally, using a twin-spiral countercurrent mixer, the abrasive and the second mixture are thoroughly stirred for 3 minutes, and then the first mixture is added and stirred thoroughly for another 5 minutes until all the raw materials are thoroughly mixed.

[0075] S30. Using a forming press, the press turntable is controlled to rotate at 35 r / min to spread and form the mixed intermediate material to obtain a grinding wheel blank.

[0076] S40. After the grinding wheel blank is left to stand naturally for 15 hours, it is heated and dried at 60°C for 3 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank. The specific standing and heating drying time can be distinguished according to the grinding wheel grit size and size specifications.

[0077] S50. Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 450℃ at a rate of 1℃ / min and held for 4-6 hours, then heated to 1000℃ at a rate of 1℃ / min and sintered for 6 hours to obtain the grinding wheel blank.

[0078] S60. The grinding wheel blank is processed according to the process parameters to obtain the finished grinding wheel.

[0079] S70. Mix 100 parts by weight of the waste liquid generated during the preparation of ceramic grinding wheels with 3 parts by weight, stir thoroughly, let stand for 8 hours until complete sedimentation, and then filter and separate directly.

[0080] Example 3

[0081] A ceramic grinding wheel dyed with iron oxide red comprises the following components by weight: 90 parts abrasive, 23 parts ceramic binder, 0.8 parts iron oxide red, 1.5 parts hydroxypropyl methylcellulose, and 4 parts polyquaternium salt aqueous solution, wherein the concentration of the polyquaternium salt aqueous solution is 2%, and the ceramic binder comprises 55 wt% SiO2, 10 wt% B2O3, 20 wt% Al2O3, and 15 wt% alkali metal oxide and / or alkaline earth metal oxide.

[0082] The specific preparation process of this type of iron oxide red dyed ceramic grinding wheel includes:

[0083] S10. The following components are taken as processing raw materials by weight: 90 parts abrasive, 23 parts ceramic binder, 0.8 parts iron oxide red, 1.5 parts hydroxypropyl methylcellulose, and 4 parts polyquaternium salt aqueous solution, the concentration of which is 2%.

[0084] S20. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain a first mixture for later use. Then, the polyquaternary ammonium salt aqueous solution and iron oxide red are thoroughly ground and sieved through an F200 mesh sieve to obtain a second mixture for later use. Finally, using a twin-spiral countercurrent mixer, the abrasive and the second mixture are thoroughly stirred for 3 minutes, and then the first mixture is added and stirred thoroughly for another 5 minutes until all the raw materials are thoroughly mixed.

[0085] S30. Using a forming press, the press turntable is controlled to rotate at 35 r / min to spread and form the mixed intermediate material to obtain a grinding wheel blank.

[0086] S40. After the grinding wheel blank is left to stand naturally for 15 hours, it is heated and dried at 65°C for 4 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank. The specific standing and heating drying time can be distinguished according to the grinding wheel grit size and size specifications.

[0087] S50. Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 500℃ at a rate of 1℃ / min and held for 5h, then heated to 1050℃ at a rate of 1℃ / min and sintered for 7h to obtain the grinding wheel blank.

[0088] S60. The grinding wheel blank is processed according to the process parameters to obtain the finished grinding wheel.

[0089] S70. Mix 100 parts by weight of the waste liquid generated during the preparation of ceramic grinding wheels with 5 parts by weight, stir thoroughly, let stand for 10 hours until complete sedimentation, and then filter and separate directly.

[0090] Example 4

[0091] A ceramic grinding wheel dyed with iron oxide red comprises the following components by weight: 90 parts abrasive, 28 parts ceramic binder, 1 part iron oxide red, 2 parts hydroxypropyl methylcellulose, and 5 parts polyquaternium salt aqueous solution, wherein the concentration of the polyquaternium salt aqueous solution is 5%, and the ceramic binder comprises 60 wt% SiO2, 10 wt% B2O3, 15 wt% Al2O3, and 15 wt% alkali metal oxide and / or alkaline earth metal oxide.

[0092] The specific preparation process of this type of iron oxide red dyed ceramic grinding wheel includes:

[0093] S10. The following components are taken as processing raw materials by weight: 90-120 parts of abrasive, 10-28 parts of ceramic binder, 0.2-1 parts of iron oxide red, 0.5-2 parts of hydroxypropyl methylcellulose, and 2-5 parts of polyquaternium salt aqueous solution, wherein the concentration of polyquaternium salt aqueous solution is 0.5%-5%.

[0094] S20. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain a first mixture for later use. Then, the polyquaternary ammonium salt aqueous solution and iron oxide red are thoroughly ground and sieved through an F200 mesh sieve to obtain a second mixture for later use. Finally, using a twin-spiral countercurrent mixer, the abrasive and the second mixture are thoroughly stirred for 3-4 minutes, and then the first mixture is added and stirred thoroughly for 4-6 minutes until all the raw materials are thoroughly mixed.

[0095] S30. Using a forming press, the press turntable is controlled to rotate at a speed of 35-45 r / min to spread and form the mixed intermediate material to obtain a grinding wheel blank.

[0096] S40. After the grinding wheel blank is left to stand naturally for 12 to 24 hours, it is heated and dried at 60 to 80°C for 2 to 12 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank. The specific standing and heating drying time can be distinguished according to the grinding wheel grit size and size specifications.

[0097] S50. Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 450-550℃ at a rate of 1-2℃ / min and held for 4-6 hours, then heated to 1000-1100℃ at a rate of 1-1.5℃ / min and sintered for 6-8 hours to obtain the grinding wheel blank.

[0098] S60. The grinding wheel blank is processed according to the process parameters to obtain the finished grinding wheel.

[0099] S70. By weight, 100 parts of the waste liquid generated during the preparation of ceramic grinding wheels are thoroughly mixed with 2 to 10 parts of polyacrylamide. After standing for 6 to 12 hours until complete sedimentation, the mixture is directly filtered and separated.

[0100] Example 5

[0101] A ceramic grinding wheel dyed with iron oxide red comprises the following components by weight: 100 parts abrasive, 10 parts ceramic binder, 0.2 parts iron oxide red, 0.5 parts hydroxypropyl methylcellulose, and 2 parts polyquaternium salt aqueous solution, wherein the concentration of the polyquaternium salt aqueous solution is 0.5%, and the ceramic binder comprises 45 wt% SiO2, 15 wt% B2O3, 20 wt% Al2O3, and 20 wt% alkali metal oxide and / or alkaline earth metal oxide.

[0102] The specific preparation process of this type of iron oxide red dyed ceramic grinding wheel includes:

[0103] S10. The following components are taken as processing raw materials by weight: 100 parts abrasive, 10 parts ceramic binder, 0.2 parts iron oxide red, 0.5 parts hydroxypropyl methylcellulose, and 2 parts polyquaternium salt aqueous solution with a concentration of 0.5%.

[0104] S20. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain a first mixture for later use. Then, the polyquaternary ammonium salt aqueous solution and iron oxide red are thoroughly ground and sieved through an F200 mesh sieve to obtain a second mixture for later use. Finally, using a twin-screw countercurrent mixer, the abrasive and the second mixture are thoroughly stirred for 3 minutes, and then the first mixture is added and stirred thoroughly for another 4 minutes until all the raw materials are thoroughly mixed.

[0105] S30. Using a forming press, the press turntable is controlled to rotate at 40 r / min to spread and form the mixed intermediate material into a grinding wheel blank.

[0106] S40. After the grinding wheel blank is left to stand naturally for 18 hours, it is heated and dried at 65°C for 4 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank. The specific standing and heating drying time can be distinguished according to the grinding wheel grit size and size specifications.

[0107] S50. Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 500℃ at a rate of 1℃ / min and held for 5h, then heated to 1000℃ at a rate of 1℃ / min and sintered for 6h to obtain the grinding wheel blank.

[0108] S60. The grinding wheel blank is processed according to the process parameters to obtain the finished grinding wheel.

[0109] S70. Mix 100 parts by weight of the waste liquid generated during the preparation of ceramic grinding wheels with 2 parts by weight, stir thoroughly, let stand for 6 hours until complete sedimentation, and then filter and separate directly.

[0110] Example 6

[0111] A ceramic grinding wheel dyed with iron oxide red comprises the following components by weight: 100 parts abrasive, 18 parts ceramic binder, 0.5 parts iron oxide red, 1 part hydroxypropyl methylcellulose, and 3 parts polyquaternium salt aqueous solution, wherein the concentration of the polyquaternium salt aqueous solution is 1%, and the ceramic binder comprises 50 wt% SiO2, 10 wt% B2O3, 20 wt% Al2O3, and 20 wt% alkali metal oxide and / or alkaline earth metal oxide.

[0112] The specific preparation process of this type of iron oxide red dyed ceramic grinding wheel includes:

[0113] S10. The following components are taken as processing raw materials by weight: 100 parts abrasive, 18 parts ceramic binder, 0.5 parts iron oxide red, 1 part hydroxypropyl methylcellulose, and 3 parts polyquaternium salt aqueous solution, the concentration of which is 1%.

[0114] S20. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain a first mixture for later use. Then, the polyquaternary ammonium salt aqueous solution and iron oxide red are thoroughly ground and sieved through an F200 mesh sieve to obtain a second mixture for later use. Finally, using a twin-spiral countercurrent mixer, the abrasive and the second mixture are thoroughly stirred for 4 minutes, and then the first mixture is added and stirred thoroughly for another 4 minutes until all the raw materials are thoroughly mixed.

[0115] S30. Using a forming press, the press turntable is controlled to rotate at 40 r / min to spread and form the mixed intermediate material to obtain a grinding wheel blank.

[0116] S40. After the grinding wheel blank is left to stand naturally for 15 hours, it is heated and dried at 70°C for 4 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank. The specific standing and heating drying time can be distinguished according to the grinding wheel grit size and size specifications.

[0117] S50. Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 500℃ at a rate of 1℃ / min and held for 4 hours, then heated to 1050℃ at a rate of 1℃ / min and sintered for 7 hours to obtain the grinding wheel blank.

[0118] S60. The grinding wheel blank is machined according to the process parameters to obtain the finished grinding wheel.

[0119] S70. Mix 100 parts by weight of the waste liquid generated during the preparation of ceramic grinding wheels with 4 parts by weight, stir thoroughly, let stand for 8 hours until complete sedimentation, and then filter and separate directly.

[0120] Example 7

[0121] A ceramic grinding wheel dyed with iron oxide red comprises the following components by weight: 100 parts abrasive, 23 parts ceramic binder, 0.8 parts iron oxide red, 1.5 parts hydroxypropyl methylcellulose, and 4 parts polyquaternium salt aqueous solution, wherein the concentration of the polyquaternium salt aqueous solution is 4%, and the ceramic binder comprises 60 wt% SiO2, 10 wt% B2O3, 10 wt% Al2O3, and 20 wt% alkali metal oxide and / or alkaline earth metal oxide.

[0122] The specific preparation process of this type of iron oxide red dyed ceramic grinding wheel includes:

[0123] S10. The following components are taken as processing raw materials by weight: 100 parts abrasive, 23 parts ceramic binder, 0.8 parts iron oxide red, 1.5 parts hydroxypropyl methylcellulose, and 4 parts polyquaternium salt aqueous solution with a concentration of 4%.

[0124] S20. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain a first mixture for later use. Then, the polyquaternary ammonium salt aqueous solution and iron oxide red are thoroughly ground and sieved through an F200 mesh sieve to obtain a second mixture for later use. Finally, using a twin-spiral countercurrent mixer, the abrasive and the second mixture are thoroughly stirred for 4 minutes, and then the first mixture is added and stirred thoroughly for another 5 minutes until all the raw materials are thoroughly mixed.

[0125] S30. Using a forming press, the press turntable is controlled to rotate at 40 r / min to spread and form the mixed intermediate material into a grinding wheel blank.

[0126] S40. After the grinding wheel blank is left to stand naturally for 18 hours, it is heated and dried at 70°C for 6 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank. The specific standing and heating drying time can be distinguished according to the grinding wheel grit size and size specifications.

[0127] S50. Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 500℃ at a rate of 1.5℃ / min and held for 5h, then heated to 1100℃ at a rate of 1.2℃ / min and sintered for 7h to obtain the grinding wheel blank.

[0128] S60. The grinding wheel blank is processed according to the process parameters to obtain the finished grinding wheel.

[0129] S70. Mix 100 parts by weight of the waste liquid generated during the preparation of ceramic grinding wheels with 5 parts by weight, stir thoroughly, let stand for 10 hours until complete sedimentation, and then filter and separate directly.

[0130] Example 8

[0131] A ceramic grinding wheel dyed with iron oxide red comprises the following components by weight: 100 parts abrasive, 28 parts ceramic binder, 1 part iron oxide red, 2 parts hydroxypropyl methylcellulose, and 5 parts polyquaternium salt aqueous solution, wherein the concentration of the polyquaternium salt aqueous solution is 5%, and the ceramic binder comprises 65 wt% SiO2, 15 wt% B2O3, 10 wt% Al2O3, and 10 wt% alkali metal oxide and / or alkaline earth metal oxide.

[0132] The specific preparation process of this type of iron oxide red dyed ceramic grinding wheel includes:

[0133] S10. The following components are taken as processing raw materials by weight: 100 parts abrasive, 28 parts ceramic binder, 1 part iron oxide red, 2 parts hydroxypropyl methylcellulose, and 5 parts polyquaternium salt aqueous solution, the concentration of which is 5%.

[0134] S20. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain a first mixture for later use. Then, the polyquaternary ammonium salt aqueous solution and iron oxide red are thoroughly ground and sieved through an F200 mesh sieve to obtain a second mixture for later use. Finally, using a twin-screw countercurrent mixer, the abrasive and the second mixture are thoroughly stirred for 4 minutes, and then the first mixture is added and stirred thoroughly for another 6 minutes until all the raw materials are thoroughly mixed.

[0135] S30. Using a forming press, the press turntable is controlled to rotate at 40 r / min to spread and form the mixed intermediate material into a grinding wheel blank.

[0136] S40. After the grinding wheel blank is left to stand naturally for 20 hours, it is heated and dried at 70°C for 8 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank. The specific standing and heating drying time can be distinguished according to the grinding wheel grit size and size specifications.

[0137] S50. Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 550℃ at a rate of 2℃ / min and held for 6 hours, then heated to 1100℃ at a rate of 1.5℃ / min and sintered for 8 hours to obtain the grinding wheel blank.

[0138] S60. The grinding wheel blank is processed according to the process parameters to obtain the finished grinding wheel.

[0139] S70. Mix 100 parts by weight of the waste liquid generated during the preparation of ceramic grinding wheels with 8 parts by weight, stir thoroughly, let stand for 10 hours until complete sedimentation, and then filter and separate directly.

[0140] Example 9

[0141] A ceramic grinding wheel dyed with iron oxide red comprises the following components by weight: 120 parts abrasive, 10 parts ceramic binder, 0.2 parts iron oxide red, 0.5 parts hydroxypropyl methylcellulose, and 2 parts polyquaternium salt aqueous solution, wherein the concentration of the polyquaternium salt aqueous solution is 0.5%, and the ceramic binder comprises 50 wt% SiO2, 10 wt% B2O3, 20 wt% Al2O3, and 20 wt% alkali metal oxide and / or alkaline earth metal oxide.

[0142] The specific preparation process of this type of iron oxide red dyed ceramic grinding wheel includes:

[0143] S10. The following components are taken as processing raw materials by weight: 120 parts abrasive, 10 parts ceramic binder, 0.2 parts iron oxide red, 0.5 parts hydroxypropyl methylcellulose, and 2 parts polyquaternium salt aqueous solution with a concentration of 0.5%.

[0144] S20. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain a first mixture for later use. Then, the polyquaternary ammonium salt aqueous solution and iron oxide red are thoroughly ground and sieved through an F200 mesh sieve to obtain a second mixture for later use. Finally, using a twin-spiral countercurrent mixer, the abrasive and the second mixture are thoroughly stirred for 4 minutes, and then the first mixture is added and stirred thoroughly for another 4 minutes until all the raw materials are thoroughly mixed.

[0145] S30. Using a forming press, the press turntable is controlled to rotate at 45 r / min to spread and form the mixed intermediate material to obtain a grinding wheel blank.

[0146] S40. After the grinding wheel blank is left to stand naturally for 18 hours, it is heated and dried at 75°C for 8 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank. The specific standing and heating drying time can be distinguished according to the grinding wheel grit size and size specifications.

[0147] S50. Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 500℃ at a rate of 1.5℃ / min and held for 5h, then heated to 1050℃ at a rate of 1℃ / min and sintered for 7h to obtain the grinding wheel blank.

[0148] S60. The grinding wheel blank is processed according to the process parameters to obtain the finished grinding wheel.

[0149] S70. Mix 100 parts by weight of the waste liquid generated during the preparation of ceramic grinding wheels with 4 parts by weight, stir thoroughly, let stand for 6 hours until complete sedimentation, and then filter and separate directly.

[0150] Example 10

[0151] A ceramic grinding wheel dyed with iron oxide red comprises the following components by weight: 120 parts abrasive, 15 parts ceramic binder, 0.5 parts iron oxide red, 1 part hydroxypropyl methylcellulose, and 3 parts polyquaternium salt aqueous solution, wherein the concentration of the polyquaternium salt aqueous solution is 2%, and the ceramic binder comprises 55 wt% SiO2, 15 wt% B2O3, 10 wt% Al2O3, and 20 wt% alkali metal oxide and / or alkaline earth metal oxide.

[0152] The specific preparation process of this type of iron oxide red dyed ceramic grinding wheel includes:

[0153] S10. The following components are taken as processing raw materials by weight: 120 parts abrasive, 15 parts ceramic binder, 0.5 parts iron oxide red, 1 part hydroxypropyl methylcellulose, and 3 parts polyquaternium salt aqueous solution, the concentration of which is 2%.

[0154] S20. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain a first mixture for later use. Then, the polyquaternary ammonium salt aqueous solution and iron oxide red are thoroughly ground and sieved through an F200 mesh sieve to obtain a second mixture for later use. Finally, using a twin-spiral countercurrent mixer, the abrasive and the second mixture are thoroughly stirred for 4 minutes, and then the first mixture is added and stirred thoroughly for another 5 minutes until all the raw materials are thoroughly mixed.

[0155] S30. Using a forming press, the press turntable is controlled to rotate at 45 r / min to spread and form the mixed intermediate material to obtain a grinding wheel blank.

[0156] S40. After the grinding wheel blank is left to stand naturally for 18 hours, it is heated and dried at 75°C for 10 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank. The specific standing and heating drying time can be distinguished according to the grinding wheel grit size and size specifications.

[0157] S50. Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 500℃ at a rate of 1.5℃ / min and held for 5h, then heated to 1050℃ at a rate of 1.2℃ / min and sintered for 7h to obtain the grinding wheel blank.

[0158] S60. The grinding wheel blank is processed according to the process parameters to obtain the finished grinding wheel.

[0159] S70. Mix 100 parts by weight of the waste liquid generated during the preparation of ceramic grinding wheels with 6 parts by weight, stir thoroughly, let stand for 8 hours until complete sedimentation, and then filter and separate directly.

[0160] Example 11

[0161] A ceramic grinding wheel dyed with iron oxide red comprises the following components by weight: 120 parts abrasive, 20 parts ceramic binder, 0.8 parts iron oxide red, 1.5 parts hydroxypropyl methylcellulose, and 4 parts polyquaternium salt aqueous solution, wherein the concentration of the polyquaternium salt aqueous solution is 4%, and the ceramic binder comprises 65 wt% SiO2, 5 wt% B2O3, 15 wt% Al2O3, and 15 wt% alkali metal oxide and / or alkaline earth metal oxide.

[0162] The specific preparation process of this type of iron oxide red dyed ceramic grinding wheel includes:

[0163] S10. The following components are taken as processing raw materials by weight: 120 parts abrasive, 20 parts ceramic binder, 0.8 parts iron oxide red, 1.5 parts hydroxypropyl methylcellulose, and 4 parts polyquaternium salt aqueous solution with a concentration of 4%.

[0164] S20. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain a first mixture for later use. Then, the polyquaternary ammonium salt aqueous solution and iron oxide red are thoroughly ground and sieved through an F200 mesh sieve to obtain a second mixture for later use. Finally, using a twin-spiral countercurrent mixer, the abrasive and the second mixture are thoroughly stirred for 4 minutes, and then the first mixture is added and stirred thoroughly for another 5 minutes until all the raw materials are thoroughly mixed.

[0165] S30. Using a forming press, the press turntable is controlled to rotate at 45 r / min to spread and form the mixed intermediate material to obtain a grinding wheel blank.

[0166] S40. After the grinding wheel blank is left to stand naturally for 20 hours, it is heated and dried at 75°C for 8 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank. The specific standing and heating drying time can be distinguished according to the grinding wheel grit size and size specifications.

[0167] S50. Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 550℃ at a rate of 2℃ / min and held for 6 hours, then heated to 1100℃ at a rate of 1.5℃ / min and sintered for 8 hours to obtain the grinding wheel blank.

[0168] S60. The grinding wheel blank is machined according to the process parameters to obtain the finished grinding wheel.

[0169] S70. Mix 100 parts by weight of the waste liquid generated during the preparation of ceramic grinding wheels with 8 parts by weight, stir thoroughly, let stand for 10 hours until complete sedimentation, and then filter and separate directly.

[0170] Example 12

[0171] A ceramic grinding wheel dyed with iron oxide red comprises the following components by weight: 120 parts abrasive, 28 parts ceramic binder, 1 part iron oxide red, 2 parts hydroxypropyl methylcellulose, and 5 parts polyquaternium salt aqueous solution, wherein the concentration of the polyquaternium salt aqueous solution is 5%, and the ceramic binder comprises 65 wt% SiO2, 10 wt% B2O3, 10 wt% Al2O3, and 15 wt% alkali metal oxide and / or alkaline earth metal oxide.

[0172] The specific preparation process of this type of iron oxide red dyed ceramic grinding wheel includes:

[0173] S10. The following components are taken as processing raw materials by weight: 120 parts abrasive, 28 parts ceramic binder, 1 part iron oxide red, 2 parts hydroxypropyl methylcellulose, and 5 parts polyquaternium salt aqueous solution, the concentration of which is 5%.

[0174] S20. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain a first mixture for later use. Then, the polyquaternary ammonium salt aqueous solution and iron oxide red are thoroughly ground and sieved through an F200 mesh sieve to obtain a second mixture for later use. Finally, using a twin-screw countercurrent mixer, the abrasive and the second mixture are thoroughly stirred for 4 minutes, and then the first mixture is added and stirred thoroughly for another 6 minutes until all the raw materials are thoroughly mixed.

[0175] S30. Using a forming press, the press turntable is controlled to rotate at 45 r / min to spread and form the mixed intermediate material to obtain a grinding wheel blank.

[0176] S40. After the grinding wheel blank is left to stand naturally for 24 hours, it is heated and dried at 80°C for 12 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank. The specific standing and heating drying time can be distinguished according to the grinding wheel grit size and size specifications.

[0177] S50. Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 550℃ at a rate of 2℃ / min and held for 6 hours, then heated to 1100℃ at a rate of 1.5℃ / min and sintered for 8 hours to obtain the grinding wheel blank.

[0178] S60. The grinding wheel blank is machined according to the process parameters to obtain the finished grinding wheel.

[0179] S70. Mix 100 parts by weight of the waste liquid generated during the preparation of ceramic grinding wheels with 10 parts by weight, stir thoroughly, let stand for 12 hours until complete sedimentation, and then filter and separate directly.

[0180] Comparative Example 1

[0181] Compared to Example 7, 1.5 parts of hydroxypropyl methylcellulose were replaced with 1.5 parts of dextrin solution.

[0182] Comparative Example 2

[0183] Compared to Example 7, 1.5 parts of hydroxypropyl methylcellulose were replaced with 1.5 parts of water glass.

[0184] Comparative Example 3

[0185] Compared to Example 7, 4 parts of the polyquaternary ammonium salt aqueous solution were replaced with 4 parts of dextrin solution.

[0186] Comparative Example 4

[0187] Compared to Example 7, 4 parts of the polyquaternary ammonium salt aqueous solution were replaced with 4 parts of water glass.

[0188] The results of testing and comparison of various performance parameters of the ceramic grinding wheels in the above embodiments and comparative examples are shown in the table below:

[0189]

[0190]

[0191] As shown in the table above, the iron oxide red dyed ceramic grinding wheel provided by this invention does not have appearance problems such as agglomerated iron spots and color difference. The iron oxide red is effectively and uniformly dispersed and mixed, and the grinding wheel has good stability and balance performance. The green strength of the grinding wheel is increased by 1.2 to 2 times compared with the existing process, and the drying cracks are reduced by at least 40% to 60%. By adding polyacrylamide, the iron oxide red contained in the wastewater can be effectively settled, meeting the requirements of green environmental protection. Moreover, the treated wastewater can meet the requirements of reuse, realizing the multiple recycling of wastewater and achieving the effect of energy saving and emission reduction.

[0192] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of these fall within the protection scope of the present invention.

Claims

1. A preparation process for an iron oxide red-dyed ceramic grinding wheel, characterized in that, include: S10. The following components are taken as processing raw materials by weight: 90-120 parts abrasive, 10-28 parts ceramic binder, 0.2-1 parts iron oxide red, 0.5-2 parts hydroxypropyl methylcellulose, and 2-5 parts polyquaternium salt aqueous solution, wherein the concentration of polyquaternium salt aqueous solution is 0.5%-5%; S20. Grind and mix all the raw materials thoroughly to obtain a mixed intermediate material; S30. Using a forming press, the press turntable is controlled to rotate at a speed of 35~45r / min to spread and form the mixed intermediate material to obtain a grinding wheel blank; S40. The grinding wheel blank is subjected to natural static and heat drying treatment to obtain a polished grinding wheel blank. S50. The grinding wheel blank is sintered at a temperature of 1000~1100℃ under an oxidizing atmosphere to obtain a grinding wheel blank. S60. The grinding wheel blank is machined according to the process parameters to obtain the finished grinding wheel. Step S20 specifically includes: S21. After thoroughly mixing the ceramic binder and hydroxypropyl methylcellulose, the mixture is sieved through an F100 mesh sieve to obtain the first mixture for later use. S22. After thoroughly grinding the polyquaternium salt aqueous solution and iron oxide red, the mixture is sieved through an F200 mesh sieve to obtain a second mixture for later use. S23. Using a twin-spiral countercurrent mixer, first thoroughly stir the abrasive and the second mixture for 3-4 minutes, then add the first mixture and continue to thoroughly stir for 4-6 minutes until all the raw materials are fully mixed.

2. The preparation process of the iron oxide red dyed ceramic grinding wheel according to claim 1, characterized in that, The ceramic binder comprises 45wt%-65wt% SiO2, 5wt%-15wt% B2O3, 10wt%-20wt% Al2O3, and 10wt%-20wt% alkali metal oxides and / or alkaline earth metal oxides.

3. The preparation process of the iron oxide red dyed ceramic grinding wheel according to claim 1, characterized in that, Step S40 specifically involves: After the grinding wheel blank is left to stand naturally for 12 to 24 hours, it is heated and dried at 60 to 80°C for 2 to 12 days until the grinding wheel blank is completely dried to obtain a polished grinding wheel blank.

4. The preparation process of the iron oxide red dyed ceramic grinding wheel according to claim 1, characterized in that, Step S50 specifically involves: Under a sufficient oxidizing atmosphere, the grinding wheel blank is first heated to 450-550℃ at a rate of 1-2℃ / min and held for 4-6 hours, then heated to 1000-1100℃ at a rate of 1-1.5℃ / min and sintered for 6-8 hours to obtain the grinding wheel blank.

5. The preparation process of the iron oxide red dyed ceramic grinding wheel according to claim 1, characterized in that, The preparation process further includes: S70. The waste liquid generated during the preparation of ceramic grinding wheels is mixed with polyacrylamide for purification treatment, wherein the waste liquid is mixed in a ratio of 100 parts by weight to 2-10 parts by weight.

6. The preparation process of the iron oxide red dyed ceramic grinding wheel according to claim 5, characterized in that, Specifically, S70 is: By weight, 100 parts of the waste liquid generated during the preparation of ceramic grinding wheels are thoroughly mixed with 2-10 parts of polyacrylamide. After standing for 6-12 hours until complete sedimentation, the mixture is directly filtered and separated.

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