CN105754490B - A kind of preparation method of polishing powder for onyx polishing - Google Patents

Abstract

The invention discloses a method for preparing polishing powder for onyx polishing, which is characterized in that the method has the following process steps: in the reactor, add according to the following composition mass percentage concentration, lead powder: 5-8% , compound: 80~88%, tin oxide: 5~13%, the sum of each component is 100%, turn on the grinder, grind at a speed of 500 rpm for 30~60min, and obtain agate polishing powder, in which the compound Contains nano aluminum nitride, aluminum oxide, zirconium oxide, iron oxide, cobalt oxide. The preparation process is simple, the conditions are easy to control, the production cost is low, and the industrial production is easy. In the polishing process, it has good powder polishing effect, high gloss, no scratches, high flatness, and less powder consumption.

Description

A kind of preparation method of polishing powder for onyx polishing

technical field

The invention relates to the technical field of preparation of polishing powder, in particular to a preparation process of polishing powder for onyx polishing and its use in agate polishing.

Background technique

Agate is a kind of chalcedony, which can be understood as the crystal mineral of unfinished jade. It has the texture of jade, but not strong. The surface of agate is smooth, while the surface of jade is frosted and smooth. Then you can look at the color. Agate is a crystal, and its light transmission is better than that of jade, so agate shows a bright light and has various colors. It is often a striped block mixed with opal and aphanitic quartz, with a hardness of 6.5-7 degrees, a specific gravity of 2.65, and a quite layered color. Available in translucent or opaque. The original form of trigonal crystal system. It is often dense and massive and forms various structures, such as breast-shaped, grape-shaped, nodular, etc., and the common structure is concentric circles. Chalcedony has different colors, usually green, red, yellowish brown, white and other colors. The main component is silica, often repeating layers due to alternating with hydrated silica (silicic acid). ^[ The color can range from very light to dark due to the inclusion of oxidized metals. Using iron, cobalt, nickel and other salts, allowing them to permeate naturally in silicic acid gel, can make "agate" artificially, and natural agate may also be generated under similar circumstances.

The production process of agate products includes: cutting → guillotine → chisel → punching → grinding → carving → grinding and polishing. The quality of the agate polishing process directly affects the quality of its products, so the polishing process is very important in the agate production process, and the polishing powder used in the polishing process directly affects the polishing quality of the agate.

The polishing of agate is an extremely complex mechanochemical process. In this process, in addition to the mechanical action, there is also a chemical action between the agate component, the polishing powder component and the polishing mold component. Therefore, in the polishing powder system, changes in the chemical composition will lead to changes in the adhesion between the polishing mold and agate jade, and also lead to changes in the temperature and concentration of the polishing powder in the working area, which will ultimately affect the polishing efficiency. Therefore, the chemical composition of polishing powder is very important to the polishing effect of agate. Agate has high hardness, rich and colorful colors, small and uniform grains. After polishing, the finish is high, so when processing agate jade, the polishing powder needs to have a certain hardness, but also soft and delicate.

As far as polishing powder is concerned, different polishing powders have different polishing capabilities. Polishing powder is usually composed of cerium oxide, aluminum oxide, silicon oxide, iron oxide, zirconia, chromium oxide, tin oxide and other components. Different materials have different hardness and chemical properties in water, so the application occasions are different. . Diamond and aluminum nitride have a hardness of 10, silicon nitride has a hardness of 9.5, alumina and chromia have a Mohs hardness of 9, ceria and zirconia have a hardness of 7, and iron oxide has a lower hardness. In the polishing process of agate jade, polishing powder or polishing liquid should be added. Now people are polishing with aluminum oxide powder or other powders such as ferric oxide or chromium oxide, that is, using a single abrasive, that is, a single polishing powder. , but this single polishing powder can not achieve good polishing effect on agate jade. It may be that a single polishing powder is in the process of polishing friction. The fluidity or softness and hardness of the particles of the polishing powder cannot complement each other. Compounding of several oxides can overcome the above-mentioned deficiencies. Chinese patent application CN101362925B discloses a compound polishing powder for polishing optical elements and its preparation method and polishing process. There are 0.5 to 3 parts of dichromium trioxide and 1.0 Part of aluminum oxide, but the wear resistance of this composite polishing powder can not reach the polishing requirements of jade; Chinese patent CN103923569B discloses a kind of preparation method of jadeite polishing powder, which is characterized in that the mass percent Add 12%~26% cerium chloride, 20%~32% zirconium oxychloride in water, then add 15%~30% aluminum oxide, 8%~15% silicon nitride, 2%~ 6% chromium trioxide, 0.5%~3% dispersant,

Aluminum nitride, the chemical formula is AlN, is a covalent bond compound, belongs to the hexagonal crystal system, and has a lead-zinc ore crystal structure. It is white or off-white, and is an important structural material. It is a kind of superhard substance, which has lubricity and wear resistance; it is anti-oxidation at high temperature, has strong cutting ability, stable chemical properties, and it can also resist cold and heat shock. In this application, aluminum nitride, zirconia, cobalt oxide, aluminum oxide, iron oxide, lead, tin oxide, etc. are used to prepare a polishing powder for agate and jade polishing. The polishing powder has high hardness, good fluidity, softness and hardness Can not complement other advantages.

Contents of the invention

The object of the present invention is to provide a kind of preparation method and technology of the polishing powder that can reduce polishing scratches, improve polishing powder friction hardness, improve agate smoothness; The purpose of the present invention is realized through the following technical scheme.

A kind of preparation method for the polishing powder of onyx polishing, it is characterized in that, the method has following processing steps:

(1) Preparation of liquid A: In the reactor, add according to the following composition mass percentage concentration, deionized water: 52~60%, acetic acid: 5~10%, 8-hydroxyquinoline: 6~12%, dispersant : 0.5~2.0%, after stirring and dissolving, add nano-aluminum nitride: 12~18%, α-Al ₂ O ₃ : 12~18%, the sum of each component is 100%, and stir for 2~4h to obtain A liquid;

(2) Preparation of liquid B: In the reactor, add according to the following composition mass percentage concentration, deionized water: 60~70%, zirconium oxychloride: 20~30%, ferric chloride: 2~6%, chloride Cobalt: 4~10%, the sum of each component is 100%, stirring and dissolving to obtain liquid B;

(3) Preparation of the complex: under stirring, add liquid B into liquid A, the volume ratio of liquid A to liquid B is between 1:0.8~1.0, stir, add ammonia water to adjust the pH between 6.5~7.0 , react for 1~2 h, separate solid from liquid, wash with water until neutral, dry the solid at 105°C, roast at 850°C~900°C for 3 h, cool down, and pulverize by air flow to obtain the compound, the particle size of the compound 1.0~5.0μm;

(4) Preparation of agate polishing powder: In the grinding machine, add according to the following composition mass percentage concentration, lead powder: 5~8%, composite: 80~88%, tin oxide: 5~13%, each component The sum is 100%, turn on the grinder, and grind for 30-60 minutes at a speed of 500 rpm to obtain agate polishing powder, the particle size of which is 1.0-5.0 μm.

In a method for preparing polishing powder for onyx polishing, the dispersant in step (1) is sodium tartrate or sodium polyhexametaphosphate.

In a method for preparing a polishing powder for onyx polishing, the particle size of the α-alumina and aluminum nitride described in step (1) is less than 3.0 μm.

In a method for preparing polishing powder for onyx polishing, the particle diameters of the lead powder and tin oxide in step (4) are both less than 3.0 μm.

The particle size test method of the present invention is the particle size equivalent diameter measured by a laser particle size analyzer.

The method of the onyx polishing powder obtained in the present invention: it can be used for wet throwing or dry throwing, the ratio of powder and water during wet throwing is preferably between 1:1~2.5, and the dosage per square meter is 20~40g .

Compared with the prior art, the present invention has the following advantages and beneficial effects:

(1) The agate polishing powder obtained by the present invention, in the preparation process, adopts the addition of aluminum nitride components, so that the polishing friction hardness of the polishing powder has been significantly improved, and can be used for polishing various high-hardness jadeites.

(2) The agate polishing powder obtained by the present invention, in the preparation process, uses organic non-8-hydroxyquinoline as a precipitating agent, and ammonia to adjust the pH value of the system, so that soluble zirconium, iron, cobalt and 8-hydroxyquinoline are precipitated After sintering, the particles of ZrO ₂ , Fe ₂ O ₃ , and CoO are evenly distributed on the surface of Al ₂ O ₃ , AlN, and have the characteristics of small median diameter and narrow particle size distribution range. At the same time, the particles of polishing powder The fluidity or softness and hardness complement each other to achieve better polishing effect.

(3) The jade polishing powder obtained by the present invention has simple preparation process, easy control of conditions, low production cost and easy industrial production.

detailed description

Example 1

(1) Preparation of liquid A: In the reactor, add deionized water: 56 mL, acetic acid: 8 mL, 8-hydroxyquinoline: 12 g, sodium tartrate: 1 g, stir and dissolve, then add nano-aluminum nitride: 12g, α-Al ₂ O ₃ : 13g, stirred and reacted for 3h to prepare liquid A;

(2) Preparation of liquid B: In the reactor, add deionized water: 65 mL, zirconium oxychloride: 25 g, ferric chloride: 4 g, cobalt chloride: 6 g, stir and dissolve to prepare liquid B;

(3) Preparation of the complex: under stirring, add 45 mL of liquid B to 50 mL of liquid A, continue to stir, add ammonia water to adjust the pH between 6.5 and 7.0, react for 1 h, separate solid and liquid, wash with water until medium Properties, after the solid is dried at 105°C, it is calcined at 850°C~900°C for 3 h, after cooling, it is crushed by air flow to obtain a composite, and the particle size of the composite is 1.0~5.0μm;

(4) Preparation of agate polishing powder: In the grinding machine, add lead powder: 6g, compound: 84g, tin oxide: 10g, turn on the grinding machine, and grind for 40min at a speed of 500 rpm to obtain agate polishing Powder, the particle size of polishing powder is 1.0~5.0μm.

Example 2

(1) Preparation of liquid A: In the reactor, add deionized water: 52 mL, acetic acid: 5 mL, 8-hydroxyquinoline: 8 g, polysodium hexametaphosphate: 0.5 g, stir and dissolve, add nano Aluminum nitride: 18g, α-Al ₂ O ₃ : 17g, stirred and reacted for 2h to prepare liquid A;

(2) Preparation of liquid B: In the reactor, add deionized water: 60 mL, zirconium oxychloride: 30 g, ferric chloride: 6 g, cobalt chloride: 4 g, stir and dissolve to prepare liquid B;

(3) Preparation of the complex: under stirring, add 50 mL of liquid B to 50 mL of liquid A, continue to stir, add ammonia water to adjust the pH between 6.5 and 7.0, react for 2 h, separate solid and liquid, wash with water until medium Properties, after the solid is dried at 105°C, it is calcined at 850°C~900°C for 3 h, after cooling, it is crushed by air flow to obtain a composite, and the particle size of the composite is 1.0~5.0μm;

(4) Preparation of agate polishing powder: In the grinding machine, add lead powder: 5g, compound: 88g, tin oxide: 7g, turn on the grinding machine, and grind for 50min at a speed of 500 rpm to obtain agate polishing Powder, the particle size of polishing powder is 1.0~5.0μm.

Example 3

(1) Preparation of liquid A: In the reactor, add deionized water: 60 mL, acetic acid: 6 mL, 8-hydroxyquinoline: 9 g, sodium tartrate: 0.5 g, stir and dissolve, then add nano-aluminum nitride : 13g, α-Al ₂ O ₃ : 12g, stirred and reacted for 4h to prepare A solution;

(2) Preparation of liquid B: In the reactor, add deionized water: 70 mL, zirconium oxychloride: 20 g, ferric chloride: 5 g, cobalt chloride: 5 g, stir and dissolve to prepare liquid B;

(3) Preparation of the complex: under stirring, add 40 mL of liquid B to 50 mL of liquid A, continue to stir, add ammonia water to adjust the pH between 6.5 and 7.0, react for 1.5 h, separate solid and liquid, wash with water until medium Properties, after the solid is dried at 105°C, it is calcined at 850°C~900°C for 3 h, after cooling, it is crushed by air flow to obtain a composite, and the particle size of the composite is 1.0~5.0μm;

(4) Preparation of agate polishing powder: In the grinder, add lead powder: 8g, compound: 80g, tin oxide: 12g, turn on the grinder, and grind for 30 minutes at a speed of 500 rpm to obtain agate polish Powder, the particle size of polishing powder is 1.0~5.0μm.

Example 4

(1) Preparation of liquid A: In the reactor, add deionized water: 54 mL, acetic acid: 7 mL, 8-hydroxyquinoline: 10 g, polysodium hexametaphosphate: 2 g, stir and dissolve, then add nano nitrogen Aluminum: 14g, α-Al ₂ O ₃ : 15g, stirred and reacted for 2.5h to obtain liquid A;

(2) Preparation of liquid B: In the reactor, add deionized water: 62mL, zirconium oxychloride: 26g, ferric chloride: 2g, cobalt chloride: 10g, stir and dissolve to prepare liquid B;

(3) Preparation of the complex: under stirring, add 48 mL of liquid B to 50 mL of liquid A, continue stirring, add ammonia water to adjust the pH between 6.5 and 7.0, react for 1.8 h, separate solid and liquid, wash with water until medium Properties, after the solid is dried at 105°C, it is calcined at 850°C~900°C for 3 h, after cooling, it is crushed by air flow to obtain a composite, and the particle size of the composite is 1.0~5.0μm;

(4) Preparation of agate polishing powder: In the grinder, add lead powder: 7g, compound: 82g, tin oxide: 11g, turn on the grinder, and grind for 60min at a speed of 500 rpm to obtain agate polish Powder, the particle size of polishing powder is 1.0~5.0μm.

Example 5

(1) Preparation of liquid A: In the reactor, add deionized water: 110 mL, acetic acid: 20 mL, 8-hydroxyquinoline: 12 g, polysodium hexametaphosphate: 1 g, stir and dissolve, then add nano nitrogen Aluminum: 30g, α-Al ₂ O ₃ : 36g, stirred and reacted for 3.5h to obtain liquid A;

(2) Preparation of liquid B: In the reactor, add deionized water: 134 mL, zirconium oxychloride: 55 g, ferric chloride: 6 g, cobalt chloride: 16 g, stir and dissolve to prepare liquid B;

(3) Preparation of the complex: under stirring, add 90 mL of liquid B to 100 mL of liquid A, continue stirring, add ammonia water to adjust the pH between 6.5 and 7.0, react for 1.2 h, separate solid and liquid, wash with water until neutral , after the solid was dried at 105°C, it was roasted at 850°C~900°C for 3 h, and after cooling, it was pulverized by airflow to obtain a composite, the particle size of which was 1.0~5.0μm;

(4) Preparation of agate polishing powder: In the grinder, add lead powder: 16g, compound: 172g, tin oxide: 12g, turn on the grinder, and grind for 45min at a speed of 500 rpm to obtain agate polish Powder, the particle size of polishing powder is 1.0~5.0μm.

How to use: It can be used for both wet and dry polishing. When wet polishing, adjust the ratio of polishing powder to water at 1:1~2.5 to make a paste. It is recommended to use wet polishing, because dry polishing dust will cause pollution.

The agate polishing powder obtained by the invention has a good polishing effect, a glossiness of over 98 degrees, no scratches, high flatness and less powder consumption.

Claims (4)

1. a kind of preparation method of the polishing powder polished for carnelian, it is characterised in that this method has following processing step：

(1) prepared by A liquid：In the reactor, added by following composition mass percentage concentration, deionized water：52~60%, acetic acid：5 ~10%, 8-hydroxyquinoline：6~12%, dispersant：0.5~2.0%, after stirring and dissolving, add nano aluminum nitride：12~ 18%, α-Al₂O₃：12~18%, each component sum is absolutely, A liquid is made in 2~4h of stirring reaction；

(2) prepared by B liquid：In the reactor, added by following composition mass percentage concentration, deionized water：60~70%, oxychloride Zirconium：20~30%, iron chloride：2~6%, cobalt chloride：4~10%, each component sum is absolutely, B is made in stirring and dissolving Liquid；

(3) preparation of compound：Under agitation, B liquid is added in A liquid, the volume ratio of its A liquid and B liquid is 1：0.8~1.0 it Between, stirring adds ammoniacal liquor and adjusts pH between 6.5~7.0, reacts 1~2h, separation of solid and liquid is washed to neutrality, solid is through 105 After DEG C drying, 3h are calcined at 850 DEG C~900 DEG C, after cooling, through air-flow crushing, compound are produced, the particle diameter of compound is 1.0 ~5.0 μm；

(4) preparation of agate polishing powder：In grinder, added by following composition mass percentage concentration, lead powder：5~8%, it is multiple Compound：80~88%, tin oxide：5~13%, each component sum is absolutely, opens grinder, with 500 revs/min turn Speed, grinds 30~60min, obtains agate polishing powder, the particle diameter of polishing powder is 1.0~5.0 μm.

2. a kind of according to claim 1 be used for the preparation method for the polishing powder that carnelian is polished, it is characterised in that step (1) dispersant described in is sodium tartrate or poly- calgon.

3. a kind of according to claim 1 be used for the preparation method for the polishing powder that carnelian is polished, it is characterised in that step (1) α-alundum (Al2O3), its particle diameter of aluminium nitride described in are less than 3.0 μm.

4. a kind of according to claim 1 be used for the preparation method for the polishing powder that carnelian is polished, it is characterised in that step (4) particle diameter of lead powder, tin oxide described in is respectively less than 3.0 μm.