阅读说明：本技术 一种烧结型无机石英石板材及其生产工艺 (Sintered inorganic quartz stone plate and production process thereof ) 是由 李勇 冯伟坚 何海光 于 2019-10-16 设计创作，主要内容包括：本发明所述一种烧结型无机石英石板材及其生产工艺,按照重量百分比其原料为：325目-400目石英粉80％-93％,1250目石英粉0～10％,带有颜色的花岗岩石粉或石英粉：0％～10％,长石粉：1％～5％,高岭土：2％～6％,颜料：0～2％,首先将所有原材料,通过机械搅拌的方式混合均匀,按照重量份,混合料每100份,加入5-25份水、减水剂0～2份、坯体增强剂0～2份,搅拌均匀,至手捏可成型的混合料态；然后将混合料送至成型压机中压制成片状坯体,接着送进具有烘干-抽风一体功能的干燥窑炉中,然后进烧成窑炉,烧制而成的成品具有耐碱腐蚀、耐紫外线、不易变形、吸水率低、防污性能好、耐磨度好、强度高、韧性好的特点。(The invention relates to a sintered inorganic quartz stone plate and a production process thereof, wherein the sintered inorganic quartz stone plate comprises the following raw materials in percentage by weight: 80% -93% of 325-400 mesh quartz powder, 0-10% of 1250-mesh quartz powder, colored granite stone powder or quartz powder: 0% -10%, feldspar powder: 1% -5%, kaolin: 2% -6%, pigment: 0-2%, firstly, uniformly mixing all the raw materials in a mechanical stirring manner, adding 5-25 parts by weight of water, 0-2 parts by weight of a water reducing agent and 0-2 parts by weight of a green body reinforcing agent into every 100 parts by weight of the mixture, and uniformly stirring until the mixture is in a manually-kneaded and formed mixture state; then the mixture is sent to a forming press to be pressed into a sheet-shaped green body, then the sheet-shaped green body is sent to a drying kiln with the integrated drying-air draft function, and then the sheet-shaped green body is sent to a firing kiln, and a fired finished product has the characteristics of alkali corrosion resistance, ultraviolet ray resistance, difficult deformation, low water absorption, good antifouling property, good wear resistance, high strength and good toughness.)

1. A sintered inorganic quartz stone plate is characterized by comprising the following raw materials in percentage by weight: 80% -93% of 325-400 mesh quartz powder, 0-10% of 1250-mesh quartz powder, colored granite stone powder or quartz powder: 0% -10%, feldspar powder: 1% -5%, kaolin: 2% -6%, pigment: 0 to 2 percent.

2. The sintered inorganic quartzite sheet according to claim 1, characterized in that the raw materials in weight percent are: 88% of quartz powder with 325 meshes to 400 meshes, 1.5% of quartz powder with 1250 meshes, colored granite powder or quartz powder: 3%, feldspar powder: 2%, kaolin: 5%, pigment: 0.5 percent.

3. The production process of the sintered inorganic quartzite plate as claimed in claim 1, wherein all the raw materials are uniformly mixed by mechanical stirring, and 5-25 parts by weight of water, 0-2 parts by weight of water reducing agent and 0-2 parts by weight of green body reinforcing agent are added to each 100 parts by weight of the mixture, and the mixture is uniformly stirred until the mixture is in a manually-kneaded and formable state;

then conveying the mixture to a forming press to be pressed into a sheet-shaped blank, then conveying the blank into a drying kiln with the drying-air draft integrated function, drying the blank at the temperature of 70-110 ℃ until the moisture content of the blank is less than 2%, and then conveying the blank into a firing kiln;

the temperature rise rate of the temperature rise section of the sintering kiln is less than 110 ℃/min, the highest temperature interval is set to be 800-1200 ℃, the temperature is kept for 0.5-2 hours at the highest temperature, and then the temperature is reduced, wherein the temperature reduction rate is as follows: the temperature is less than 80 ℃/min between 800 ℃ and 700 ℃, less than 30 ℃/min between 700 ℃ and 500 ℃, the temperature is set to be kept for 20-120 minutes at the temperature of 550 ℃ and 600 ℃, and other temperature sections are rapidly cooled.

4. The production process of the sintered inorganic quartzite plate according to claim 3, wherein the water reducing agent is sodium tripolyphosphate or a polycarboxylic acid water reducing agent.

5. The process for producing sintered inorganic quartzite slabs according to claim 3, wherein the green body reinforcing agent is FG-253 ceramic green body reinforcing agent.

6. The production process of the sintered inorganic quartzite plate as claimed in claim 3, wherein the mixture is fed to a forming press with tonnage of 50-300 tons (with or without vibration) and pressed into a sheet-shaped blank.

Technical Field

The invention relates to a quartz stone plate, in particular to a sintered inorganic quartz stone plate and a production process thereof.

Background

At present, quartz stone products are mainly used on kitchen table tops, toilet table tops, bar counters, tea tables, floors, walls and floors and the like, and can replace natural stone, high-grade ceramic, wood and metal decorative materials due to the advantages of rich colors, natural colors, good texture and the like.

The mainstream quartz stone product in the current market is a resin type quartz stone plate product.

The resin type quartz stone plate is formed by bonding about 90 percent of quartz particles in a system by using unsaturated polyester resin, and the bending strength of the plate exceeds 30 MPa; the sintered inorganic quartz stone plate is a liquid formed by a small amount of a clay-feldspar-quartz ternary eutectic system at high temperature, and about 90% of quartz particles in the system are bonded to form the plate which is completely free of resin and has bending strength of over 40 MPa.

The inorganic quartz stone plate (cement type inorganic quartz stone) popular in the market uses about 30 percent of cement as a bonding material to bond quartz particles in the system; the sintered inorganic quartz stone plate is prepared by bonding about 90% of quartz particles in a small amount of liquid formed by a clay-feldspar-quartz ternary eutectic system at high temperature, but the inorganic quartz stone plate has the defects of high water absorption, poor antifouling property, poor corrosion resistance, low strength, easy breakage and the like.

The raw material formula of the ceramic tile is as follows: 40% -60% of clay; about 30% of feldspar; and quartz accounts for about 20%.

The final fired ceramic tile finished product system comprises the following components:

50% -70% of a glass phase; 20% -30% of mullite crystal phase; 0 to 22 percent of residual quartz.

The ceramic tile is mainly prepared from clay and feldspar, and can form more glass phases and mullite crystal phases by various process control means to ensure that quartz is melted as much as possible so as to minimize the residual quartz. In a finished ceramic tile product system, a glass phase and a mullite crystal phase are taken as main materials, only a small amount of residual quartz which cannot be melted at a high temperature is contained, the whole system of the glass phase and the mullite crystal phase is sintered and melted into a whole, the whole system is not in a composition form of a binder and granules, the ceramic tile is large in brittleness, poor in toughness, easy to break and damage, large in processing loss and difficult to apply to parts needing edge grinding, hole opening and other special-shaped processing.

Disclosure of Invention

The invention overcomes the defects in the prior art, provides a sintered inorganic quartz stone plate and a production process thereof, has the characteristics of alkali corrosion resistance, ultraviolet resistance, difficult deformation, low water absorption, good antifouling property, good wear resistance, high strength and good toughness, and has better performance compared with resin type quartz stone plates, inorganic type quartz stone plates and ceramic tiles.

In order to solve the technical problems, the invention is realized by the following technical scheme:

a sintered inorganic quartz stone plate comprises the following raw materials in percentage by weight: 80% -93% of 325-400 mesh quartz powder, 0-10% of 1250-mesh quartz powder, colored granite stone powder or quartz powder: 0% -10%, feldspar powder: 1% -5%, kaolin: 2% -6%, pigment: 0 to 2 percent.

Further, the raw materials by weight percentage are as follows: 88% of quartz powder with 325 meshes to 400 meshes, 1.5% of quartz powder with 1250 meshes, colored granite powder or quartz powder: 3%, feldspar powder: 2%, kaolin: 5%, pigment: 0.5 percent.

A production process of a sintered inorganic quartz stone plate comprises the steps of firstly, uniformly mixing all raw materials in a mechanical stirring mode, adding 5-25 parts of water, 0-2 parts of a water reducing agent and 0-2 parts of a green body reinforcing agent into every 100 parts of a mixture according to parts by weight, wherein the water reducing agent is sodium tripolyphosphate or a polycarboxylic acid water reducing agent, the green body reinforcing agent is FG-253 ceramic green body reinforcing agent (Goyue novel materials Co., Ltd., Fushan), and uniformly stirring until a mixture state capable of being formed by hand kneading is achieved;

then conveying the mixture to a forming press to be pressed into a sheet-shaped blank, then conveying the blank into a drying kiln with the drying-air draft integrated function, drying the blank at the temperature of 70-110 ℃ until the moisture content of the blank is less than 2%, and then conveying the blank into a firing kiln;

the temperature rise rate of the temperature rise section of the sintering kiln is less than 110 ℃/min, the highest temperature interval is set to be 800-1200 ℃, the temperature is kept for 0.5-2 hours at the highest temperature, and then the temperature is reduced, wherein the temperature reduction rate is as follows: the temperature is less than 80 ℃/min between 800 ℃ and 700 ℃, less than 30 ℃/min between 700 ℃ and 500 ℃, the temperature is set to be kept for 20-120 minutes at the temperature of 550 ℃ and 600 ℃, and other temperature sections are rapidly cooled.

Further, the water reducing agent is sodium tripolyphosphate or a polycarboxylic acid water reducing agent.

Further, the green body reinforcing agent is FG-253 ceramic green body reinforcing agent.

And further, conveying the mixture to a forming press (vibrating or not) with the tonnage of 50-300 tons to be pressed into a flaky green body.

Compared with the prior art, the invention has the beneficial effects that:

the invention relates to a sintered inorganic quartz stone plate and a production process thereof, wherein the sintered inorganic quartz stone plate comprises the following raw materials in percentage by weight: 80% -93% of 325-400 mesh quartz powder, 0-10% of 1250-mesh quartz powder, colored granite stone powder or quartz powder: 0% -10%, feldspar powder: 1% -5%, kaolin: 2% -6%, pigment: 0-2%, firstly, uniformly mixing all the raw materials in a mechanical stirring manner, adding 5-25 parts by weight of water, 0-2 parts by weight of a water reducing agent and 0-2 parts by weight of a green body reinforcing agent into every 100 parts by weight of the mixture, and uniformly stirring until the mixture is in a manually-kneaded and formed mixture state; then the mixture is sent to a forming press to be pressed into a sheet-shaped green body, then the sheet-shaped green body is sent to a drying kiln with the integrated drying-air draft function, and then the sheet-shaped green body is sintered in the kiln, so that the composite material has the characteristics of alkali corrosion resistance, ultraviolet ray resistance, difficult deformation, low water absorption rate, good antifouling property, good wear resistance, low strength and good toughness.

Detailed Description

The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.

1. The formula (according to weight percentage):

88 percent of 325 mesh (or 400 mesh) quartz powder

1250 mesh quartz powder 1.5%

Colored granite powder or quartz powder (used as a pattern): 3 percent of

Feldspar powder: 2 percent of

Kaolin: 5 percent of

Pigment: 0.5 percent

2. The sintered inorganic quartz stone plate is different from the resin type quartz stone plate which is the mainstream quartz stone product in the current market:

the resin type quartz stone plate is formed by bonding about 90 percent of quartz particles in a system by using unsaturated polyester resin, and the bending strength of the plate exceeds 30 MPa; the sintered inorganic quartz stone plate is a liquid formed by a small amount of clay-feldspar-quartz ternary eutectic system at high temperature, and about 90 percent of quartz particles in the system are bonded to form the plate which is completely free of resin and has the bending strength of more than 40 MPa.

Performance data pairs such as table 1:

TABLE 1

Performance index	Sintered inorganic quartz stone	Resin type quartz stone	Detection method
				Bending strength	≥40MPa	≥30MPa	GB/T 35157-2017
Mohs hardness	7	5	EN 101
				Resistance to alkali corrosion	ULA level (highest level)	ULC grade	GB 3810.13-2006
Ultraviolet ray resistance	The color difference variation value is less than 0.5	Color difference change value of about 3	GB/T 35157-2017
				Degree of deformation of large plate	0.5～1mm/3m	＜3mm/3m	GB/T 35157-2017

The strength and hardness of the sintered inorganic quartz stone plate are higher than those of the resin type quartz stone plate, the defects that the resin type quartz stone plate is not resistant to alkali corrosion and ultraviolet rays and is easy to deform are overcome, and the sintered inorganic quartz stone plate has wider application.

3. The sintered inorganic quartz stone plate is different from the inorganic quartz stone plate popular in the market:

the inorganic quartz stone plate which is popular in the market takes about 30 percent of cement as a bonding material to bond quartz particles in the system; the sintered inorganic quartz stone plate is a liquid formed by a small amount of clay-feldspar-quartz ternary eutectic system at high temperature, and about 90 percent of quartz particles in the system are bonded.

Performance data pairs such as table 2:

TABLE 2

Performance index	Sintered inorganic quartz stone	Cement type inorganic quartz stone	Detection method
				Water absorption rate	0.04％	＞1％	GB/T 35157-2017
Antifouling properties	Stain resistance value 1 (highest)	Stain resistance value 5 (lowest level)	GB/T 35157-2017
				Chemical resistance	C4 (highest level)	C1 (lowest level)	GB/T 35157-2017
Bending strength	≥50MPa	7～12MPa	GB/T 35157-2017

The sintered inorganic quartz stone plate has various performances far superior to those of the currently popular inorganic quartz stone plate, overcomes the defects of high water absorption, poor antifouling performance, low wear resistance, low strength, poor toughness, easy cracking and the like of the currently popular inorganic quartz stone plate, and has wider application.

3. Difference between sintered inorganic quartz stone plate and ceramic tile

The sintered inorganic quartz stone is formed by bonding quartz particles by a small amount of adhesive (liquid formed by a clay-feldspar-quartz ternary eutectic system at high temperature), the whole system mainly comprises the quartz particles, and the system composition is similar to that of resin type quartz stone, so the sintered inorganic quartz stone belongs to the category of artificial stone; while the tiles are different. The raw material formula of the ceramic tile is as follows:

40 to 60 percent of clay;

about 30% of feldspar;

and quartz accounts for about 20%.

The final fired ceramic tile finished product system comprises the following components:

50% -60% of glass phase;

20 to 30 percent of mullite crystal phase;

0 to 22 percent of residual quartz.

The ceramic tile is mainly prepared from clay and feldspar, and can form more glass phases and mullite crystal phases by various process control means to ensure that quartz is melted as much as possible so as to minimize the residual quartz. In a finished ceramic tile product system, a glass phase and a mullite crystal phase are taken as main materials, only a small amount of residual quartz which cannot be melted at a high temperature is contained, the whole system is sintered into a whole, the ceramic tile is not in a composition form of a binder and granules, and the ceramic tile is high in brittleness, poor in toughness, easy to break, large in processing loss and incapable of being used on a table top.

The sintered inorganic quartz stone plate still belongs to the artificial stone route and is a completely different product from ceramic tiles, and the application field of the sintered inorganic quartz stone plate is still in the field of mainstream quartz stone products

Cabinet tops, threshold stones, windowsills, wash tables, etc., which are relatively large in sheet material size and are of low brittleness.

Performance data pairs such as table 3:

TABLE 3

4. The production process of the sintered inorganic quartz stone comprises the following steps:

firstly, all the raw materials in the point 1 are uniformly mixed in a mechanical stirring mode, 15 parts of water, 1 part of water reducing agent and 1 part of green body reinforcing agent are added into every 100 parts of mixed materials, and the mixture is uniformly stirred until the mixture is in a mixture state capable of being formed by hand kneading.

And then conveying the mixture to a forming press (vibrating or not) with the tonnage of 50-300 tons to be pressed into a sheet-shaped green body, conveying the sheet-shaped green body into a drying kiln with the drying-air draft integrated function, drying at the temperature of 50-110 ℃ until the moisture content of the green body is less than 2%, and then conveying the green body into a firing kiln.

The temperature rise rate of the temperature rise section of the sintering kiln is less than 110 ℃/min, and the highest temperature interval is set to be 800-1200 ℃. And starting to cool after reaching the preset heat preservation time at the highest temperature. Cooling rate: the temperature range of 800-700 ℃ is less than 80 ℃/min, the temperature range of 700-500 ℃ is less than 30 ℃/min, and the temperature keeping time is set at 573 ℃ or above. Other temperature sections can be cooled rapidly.

Finally, it should be noted that: although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.