CN112897956A

CN112897956A - Environment-friendly inorganic artificial stone and preparation method thereof

Info

Publication number: CN112897956A
Application number: CN202110289641.3A
Authority: CN
Inventors: 赵宝军; 张宗军; 王琼; 吴琛; 曾正祥; 曾维来; 姚杰; 谭鹏
Original assignee: Shenzhen Hailong Construction Technology Co Ltd
Current assignee: Shenzhen Hailong Construction Technology Co Ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-06-04

Abstract

The application relates to the field of building decoration materials, and particularly discloses an environment-friendly inorganic artificial stone and a preparation method thereof. The inorganic artificial stone comprises the following components in percentage by weight: 40-65% of copper tailings, 5-25% of waste concrete, 22-30% of cement, 4-6% of water, 0.5-2% of water reducing agent, 1-3% of additive and 0-1% of pigment, wherein the total ratio of the copper tailings to the waste concrete is not more than 70%; the preparation method comprises the following steps: the production method comprises the steps of uniformly mixing raw materials, uniformly mixing water and a water reducing agent, adding the raw materials, uniformly stirring, adding cement, uniformly stirring, adding an additive, uniformly stirring, tiling the mixture in a mold, performing vibration and pressing molding, demolding to obtain a rough plate, and performing fixed-thickness polishing on the rough plate after steam curing and natural curing in sequence to obtain the environment-friendly inorganic artificial stone. The inorganic artificial stone in the application replaces quartz sand by copper tailings and waste concrete by 100%, and has the advantages of excellent performance, simple process and low cost.

Description

Environment-friendly inorganic artificial stone and preparation method thereof

Technical Field

The application relates to the field of building decoration stones, in particular to an environment-friendly inorganic artificial stone and a preparation method thereof.

Background

The artificial stone is an artificially synthesized decorative material and mainly comprises organic artificial stone and inorganic artificial stone. At present, the artificial stone products in China mainly comprise organic artificial stone granite, organic artificial quartz stone and solid surface material artificial stone using aluminum powder as fillers, which are made of unsaturated polyester resin, and also comprise inorganic terrazzo which is cast and molded by using cement as a cementing material. The artificial stone products are prepared by purchasing fine-finished calcium sand, quartz sand or glass particles as main filling aggregates in the market, and the cost is high.

With the continuous acceleration of the industrialization process in China, the amount of copper tailings and waste concrete in industrial production is continuously increased, the copper tailings mainly consist of fine sand grains left after crushing and selecting ores, and the waste concrete mainly comes from building waste concrete and road waste concrete. At present, copper tailings and waste concrete are treated by adopting modes such as landfill or open-air stacking in China, so that secondary pollution such as water and soil pollution is easily caused, land resources are occupied, the long-term maintenance of a stacking site is high in economic cost, and the development of cities and the ecological civilization construction are severely restricted, so that the treatment of a large amount of solid wastes such as the copper tailings and the waste concrete is a problem to be solved urgently.

In order to recycle the copper tailings and the waste concrete so as to reduce the treatment cost and the pollution to the environment, the method for producing the inorganic artificial stone by using the copper tailings and the waste concrete as the filling aggregate is provided, so that the problem of high price of production raw materials of enterprises can be well relieved, and the treatment cost of the copper tailings and the waste concrete and the pollution to the environment can be reduced.

At present, a certain amount of copper tailings and waste concrete are doped into natural aggregates such as calcium sand, quartz sand or glass particles, and most of the natural aggregates are quartz sand. However, the hardness of the copper tailings and the waste concrete is lower than that of the quartz sand, when the substitution rate of the copper tailings and the waste concrete for the quartz sand is increased, the strength of the prepared inorganic artificial stone is reduced, and when the substitution rate of the copper tailings and the waste concrete for the quartz sand is reduced, the production cost is greatly increased. Therefore, how to ensure the strength of the inorganic artificial stone while increasing the adding amount of the copper tailings and the waste concrete is a problem to be solved.

Disclosure of Invention

In order to improve the problem of guaranteeing the strength of the inorganic artificial stone while increasing the addition of copper tailings and waste concrete, the application provides the environment-friendly inorganic artificial stone and the preparation method thereof.

In a first aspect, the present application provides an environment-friendly inorganic artificial stone, which adopts the following technical scheme:

an environment-friendly inorganic artificial stone comprises the following components in percentage by weight: 40-65% of copper tailings, 5-25% of waste concrete, 22-30% of cement, 4-6% of water, 0.5-2% of water reducing agent, 1-3% of additive and 0-1% of pigment, wherein the total ratio of the copper tailings to the waste concrete is not more than 70%.

By adopting the technical scheme, the copper tailings and the waste concrete are directly used as the aggregates, and 100% of the natural quartz sand is replaced by the aggregates to prepare the inorganic artificial stone, so that the high-efficiency utilization of the copper tailings and the waste concrete is realized, the pollution of the copper tailings and the waste concrete to the environment and the huge cost generated when the copper tailings and the waste concrete are treated are reduced, the economic benefit is high, other pretreatment processes which need to be carried out when the quartz sand is used as the aggregates are also eliminated, the process is simple, and the production cost is obviously reduced; the bending strength of the environment-friendly inorganic artificial stone prepared by the application under the age of 7 days can reach 20.3MPa, the compressive strength can reach 122.6MPa, the inorganic artificial stone with excellent bending strength and compressive strength is not easy to break or damage in the production and processing process, the yield is high, the service life is longer, the product quality is stable, and the application range is wide.

In this application, copper tailing and abandonment concrete are as the coarse grain in the system, and cement is as the fine particle in the system, according to the closely knit law of filling of volume, in certain volume, when increasing the quantity of coarse grain, the quantity of fine particle then can reduce. Through the test, when the cement mixing volume was low excessively, the cement slurry can't wrap up completely and pack the hole between aggregate and pack the aggregate, leads to the inorganic rostone porosity increase that makes, influences its flexural strength and compressive strength, and when the cement mixing volume was too high, its whole heat of hydration increased, the problem that the stone material ftractures appears in the follow-up production process easily. In addition, when the total content of the copper tailings and the waste concrete exceeds 70%, the stirring state during production is influenced, the materials are difficult to stir uniformly, and the breaking strength and the compressive strength of the prepared inorganic artificial stone are further influenced.

Water is used for adjusting the stirring state of material, and when the water yield was crossed lowly, the surface of unable wet material granule completely can lead to the combining ability between cement paste and the material granule to reduce for the material becomes dry powder form, and the panel of making can have more hole, influences the bending strength and the compressive strength of panel, and when the water yield was too high, the material can change into the slurry, the subsequent preparation of panel of being not convenient for.

The water reducing agent is used for releasing water agglomerated and wrapped among cement particles, the water agglomerated and wrapped among the cement particles can influence the strength of the prepared inorganic artificial stone, and in addition, the water reducing agent can also improve the flowability of the material and improve the overall uniformity of the stirred material.

The additive is used for improving the stirring performance of materials, when the mixing amount of the additive is too high, the bonding force among material particles can be reduced, the strength of the prepared inorganic artificial stone is reduced, the viscosity of the materials is increased, the flowability is reduced, the material stirring is not uniform, the use performance of the inorganic artificial stone is influenced, and when the mixing amount of the additive is too low, the corresponding effect cannot be achieved.

Preferably, the particle size distribution of the copper tailings is as follows according to the weight percentage: 7-9% of 20-40 meshes, 17-19% of 40-80 meshes, 14-16% of 80-140 meshes, 13-15% of 140 meshes, 3-5% of 200 meshes and 40-42% above 250 meshes.

Preferably, the particle size of the waste concrete is in the range of 20-40 meshes.

Through the experiment, can make the material granule have better gradation with the particle size control of copper tailings and discarded concrete in above-mentioned within range, make the material stir more closely knit after mixing, be favorable to reducing the porosity of inorganic rostone, improved closely knit degree and intensity after the hardening of inorganic rostone.

Preferably, the water reducing agent is a polycarboxylic acid water reducing agent with the solid content of 20-40%.

Preferably, the additive is styrene-butadiene emulsion with the solid content of 40-50%.

Tests prove that when the solid contents of the water reducing agent and the additive are high, the water reducing agent and the additive have high viscosity and are not beneficial to stirring and mixing of materials, the polycarboxylic acid water reducing agent can effectively improve the fluidity of the materials in the stirring process, and the butylbenzene emulsion can improve the bending toughness of the artificial stone product, so that the artificial stone product has certain bending capacity in the processes of demolding, conveying and the like, is convenient for demolding and is not easy to crack.

Preferably, the pigment is one or more of titanium dioxide, iron black powder, iron red powder, iron yellow powder and iron brown powder.

Through adopting above-mentioned technical scheme, accessible pigment is toned inorganic rostone to in the colour that changes inorganic rostone according to use scene and demand, improved inorganic rostone's application scope.

In a second aspect, the present application provides a method for preparing an environmentally friendly inorganic artificial stone, which adopts the following technical scheme: the preparation method of the environment-friendly inorganic artificial stone comprises the following steps:

s1, uniformly mixing the copper tailings, the waste concrete and the pigment to obtain a mixture A;

s2, uniformly mixing water and the water reducing agent, adding the mixture into the mixture A prepared in the S1, and uniformly stirring to prepare a mixture B;

s3, adding the cement into the mixture B prepared in the S2, and uniformly stirring to prepare a mixture C;

s4, adding the additive into the mixture C prepared in the S3, and uniformly stirring to prepare a mixture D;

s5, uniformly spreading the mixture D prepared in the S4 in a mould, performing vibration pressing and forming, and demolding to obtain a rough board;

s6, performing steam curing on the rough board for 24-48h, then performing natural curing, and performing fixed-thickness polishing after the total curing time reaches 7 days to obtain the environment-friendly inorganic artificial stone.

By adopting the preparation method, the process is simple, the cost is saved, and because the surface of the solid particles usually has lattice defects or lattice distortion, the particles can be activated under the action of mechanical force by adopting a vibration pressing forming mode, so that the adsorbability and the cohesiveness of the particles are improved, and the bonding energy among the particles is increased, so that the plate can be immediately demoulded after being pressed and formed, a large amount of standing curing time is saved, the production time is greatly saved, and the production efficiency is improved.

Preferably, the stirring frequency in S1 is 13-17Hz, the stirring time is 1-2min, the stirring frequency in S2 is 65-75Hz, the stirring time is 2-3min, the stirring frequency in S3 is 30-40Hz, the stirring time is 2-4min, the stirring frequency in S4 is 65-75Hz, and the stirring time is 2-3 min.

Through experiments, the stirring time is too long, the copper tailings and the waste concrete can form large aggregates along with the condensation of the cement, the mixing of raw materials is not facilitated, and the subsequent stirring and press forming are influenced.

Preferably, in S5, vacuum vibration pressing molding is adopted, the vacuumizing time is 30-60S, the absolute vacuum degree is 0.09-0.1MPa, the pressure is 300 tons, the vibration frequency is 40-50Hz, and the pressing time is 2-3 min.

Through tests, the porosity of the rough plate can be reduced by adopting a vacuum vibration pressing forming mode, so that the formed rough plate is more compact, and the bending strength and the compressive strength of the inorganic artificial stone can be improved.

Preferably, the steam curing temperature in S6 is 70 to 80 ℃.

Through tests, the rough plate is easy to crack due to thermal stress when the steam curing temperature is too high, the curing effect is poor when the steam curing temperature is too low, and the mechanical property of the prepared inorganic artificial stone is poor.

In summary, the present application has the following beneficial effects:

1. according to the method, the natural quartz sand is replaced by 100% of copper tailings and waste concrete to serve as the aggregate to prepare the inorganic artificial stone, so that the high-efficiency utilization of solid wastes such as the copper tailings and the waste concrete is realized, the pollution of the solid wastes to the environment is reduced, the huge cost generated during the treatment of the solid wastes is reduced, the economic benefit is high, other pretreatment processes which are required to be carried out when the quartz sand serves as the aggregate are also avoided, the process is simple, and the production cost is obviously reduced; the breaking strength of the prepared environment-friendly inorganic artificial stone at the age of 7 days can reach 20.3MPa, the compressive strength can reach 122.6MPa, the inorganic artificial stone with excellent breaking strength and compressive strength is not easy to break or damage in the production and processing process, the yield is high, the prepared product has longer service life, the product quality is stable, and the application range is wide;

2. according to the method, the raw materials are stirred and mixed more compactly by adjusting the grain composition of the copper tailings and the waste concrete, so that the porosity of the inorganic artificial stone is reduced, and the compactness and the strength of the inorganic artificial stone are improved;

3. the method adopts a vacuum vibration pressing forming mode to prepare the inorganic artificial stone, has simple process, can well reduce the porosity in the rough plate, enables the formed rough plate to be more compact, is beneficial to improving the bending strength and the compressive strength of the inorganic artificial stone, can immediately demould after the plate is pressed and formed, saves a large amount of standing and curing time, greatly saves the production time and improves the production efficiency.

Detailed Description

In order to better understand the present invention, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the tables and data in the embodiments of the present application. It is to be understood that the described embodiments are merely a few embodiments of the present application and not all embodiments. Based on the embodiments in the present application, other embodiments obtained by persons of ordinary skill in the art with the understanding of the inventive concepts in the present application are within the scope of the present application.

With the continuous acceleration of the industrialization process in China, the amount of copper tailings and waste concrete in industrial production is continuously increased, and the copper tailings and the waste concrete are generally treated by adopting modes of landfill or open-air stacking and the like at present, so that not only is secondary pollution such as water and soil pollution easily caused, but also land resources are occupied, and the economic cost is high. In order to solve the problem of treatment of a large amount of solid waste such as copper tailings and waste concrete, the industry has tried to produce inorganic artificial stone by using copper tailings and waste concrete as filling aggregates. Compared with the existing organic artificial stone mainly prepared from unsaturated polyester resin, the solid surface material artificial stone prepared from aluminum powder serving as a filling material and the inorganic terrazzo cast and molded by taking cement as a cementing material, the inorganic artificial stone produced by taking fine-finished calcium sand, quartz sand or glass particles as main filling aggregates has high cost, and the problems of high price, short supply and the like of production raw materials of enterprises can be well relieved by adopting copper tailings and waste concrete as the filling aggregates to produce the inorganic artificial stone. The formula for preparing the inorganic artificial stone by using the copper tailings and the waste concrete to 100% replace quartz sand as the aggregate is researched, the prepared inorganic artificial stone is excellent in bending resistance and compressive strength, the efficient utilization of solid wastes such as the copper tailings and the waste concrete is realized, the economic benefit is high, the preparation process is simple, the production cost is remarkably reduced, and the market demand can be well met.

In order to facilitate understanding of the technical solutions of the present application, the following detailed descriptions of the present application are provided with reference to tables and examples, but the present application is not limited to the scope of protection defined by the present application.

The sources of the raw materials in the examples are as follows:

the copper tailings are conventional non-toxic treated copper tailings, the copper tailings in the embodiment of the application are selected from a water-wood tailing flushing reservoir in the city of cupling of Anhui province, and the copper tailings are subjected to non-toxic treatment before being discharged from the reservoir, and the batch is # 20201209;

the waste concrete is conventional waste concrete with the strength of C15-C60, such as building waste concrete, road waste concrete, bridge waste concrete and the like, and the waste concrete in the embodiment of the application is selected from road concrete waste materials with the strength of C30, which are designed by Guangdong Hailong building science and technology Limited company, and the batch is # 20201212;

the cement is selected from P.W-152.5 white Portland cement produced by Yinshan white cement GmbH of Jiangxi;

the water reducing agent is selected from a polycarboxylic acid high-efficiency water reducing agent produced by Zhongjiao fourth aviation engineering administration Limited company, the model is HSP-V, and the solid content is 30 percent;

the additive is selected from butylbenzene emulsion produced by Shanghai Xinte Ma chemical limited company, the type is 5840, and the solid content is 50%;

the pigment can be one or more of titanium dioxide, iron black powder, iron red powder, iron yellow powder and iron brown powder which are used for conventional coloring, and the pigment in the embodiment of the application is selected from iron red powder produced by Deke effect pigment Co.

Examples

Example 1

An environment-friendly inorganic artificial stone comprises the following components in percentage by mass: 50% of copper tailings, 15% of waste concrete, 25% of cement, 5% of water, 2% of a water reducing agent and 3% of an additive.

Wherein, the particle size distribution of the copper tailings is as follows: by mass fraction, 20-40 mesh 8%, 40-80 mesh 18%, 80-140 mesh 15%, 140-200 mesh 14%, 200-250 mesh 4%, 41% above 250 mesh, the particle size range of the waste concrete is 20-40 mesh, and the average particle size is 30 mesh.

The preparation method comprises the following steps:

s1, adding the copper tailings and the waste concrete into a stirring container, and stirring and mixing uniformly to obtain a mixture A, wherein the stirring time is 2min, and the stirring frequency is 15 Hz;

s2, uniformly stirring and mixing water and the water reducing agent, adding the mixture into the mixture A prepared in the S1, uniformly stirring to prepare a mixture B, and stirring for 3min at the stirring frequency of 70 Hz;

s3, adding the cement into the mixture B prepared in the S2, and uniformly stirring to prepare a mixture C, wherein the stirring time is 4min, and the stirring frequency is 35 Hz;

s4, adding the additive into the mixture C prepared in the S3, and uniformly stirring to prepare a mixture D, wherein the stirring time is 3min, and the stirring frequency is 70 Hz;

s5, uniformly spreading the mixture D prepared in S4 in a mold, then putting the mold into a press (Niyi Xinfeng quartz stone mechanical Co., Ltd., model number of 3080 multiplied by 780), carrying out vacuum vibration pressing molding, vacuumizing for 60S, wherein the absolute vacuum degree is 0.1MPa, the pressure is 300 tons, the vibration frequency is 50Hz, the pressing time is 3min, and demolding is immediately carried out after molding to obtain a rough board;

s6, performing steam curing on the rough board for 48 hours at the curing temperature of 75 +/-5 ℃, then performing natural curing at normal temperature for 5 days, and performing fixed-thickness polishing after curing to obtain the environment-friendly inorganic artificial stone.

Example 2

The difference from example 1 is that the copper tailings are 46%, the waste concrete is 14%, and the cement is 30%.

Example 3

The difference from the example 1 is that the copper tailings are 54%, the waste concrete is 16%, the cement is 22%, the water is 5%, the water reducing agent is 1%, and the additive is 2%.

Example 4

The difference from example 1 is that the copper tailings are 40% and the waste concrete is 25%.

Example 5

The difference from example 1 is that the copper tailings are 45% and the waste concrete is 20%.

Example 6

The difference from example 1 is that the copper tailings are 55% and the waste concrete is 10%.

Example 7

The difference from example 1 is that the copper tailings are 60% and the waste concrete is 5%.

Example 8

The difference from the example 1 is that the copper tailings are 50%, the waste concrete is 14%, the cement is 25%, the water is 5%, the water reducing agent is 2%, the additive is 3% and the pigment is 1%.

Comparative example

Comparative example 1

The difference from example 1 is that the copper tailings are 57%, the waste concrete is 18%, and the cement is 15%.

Performance test

The inorganic artificial stones prepared in the examples 1 to 8 and the comparative example 1 are subjected to flexural strength and compressive strength detection, the detection standard refers to GB/T35160-2017, and the test data are shown in Table 1.

The detection method comprises the following steps of: 6 samples with the same specification are cut from the same batch of inorganic artificial stone, the standard state of the surface of the sample is a polished surface, the length (L) of the sample is (200 +/-0.3) mm, the width (b) of the sample is (50 +/-0.3) mm, and the thickness (h) of the sample is (25 +/-0.3) mm. Before the test, the sample is placed at the temperature (40 +/-5) DEG C and dried to constant weight, the dried sample is placed in a dryer, and after the dried sample is cooled to the room temperature (20 +/-5) DEG C, the loading test is completed within 24 h. The loading test was conducted in a three-point bending-resistant manner, the distance (L) between the two support shafts was adjusted to be 20mm shorter than the length (L) of the test specimen, the load was increased at a loading rate of (0.25. + -. 0.05) MPa/s until the test specimen was fractured, and the load value (F) at the time of fracture was recorded. The flexural strength of each sample was calculated as follows: f. of_f＝1.5Fl/bh²Then taking the average value f_{f average}。

Compressive strength: 6 samples with the same specification are cut from the same batch of inorganic artificial stone, the standard state of the surfaces of the samples is a polished surface, and the side length (a) of the samples is a cube with (50 +/-5) mm. Before the test, the sample is placed at the temperature (40 +/-5) DEG C and dried to constant weight, the dried sample is placed in a dryer, and after the dried sample is cooled to the room temperature (20 +/-5) DEG C, the loading test is completed within 24 h. Continuously applying load to the sample at a constant speed of (1 +/-0.5) MPa/s until the sample is completely destroyed, and recording the load value (P) when the sample is destroyed. The compressive strength of each sample was calculated as follows: p ═ P/a²Then take the average value p_Average。

Table 1: data on the examination of the inorganic artificial stone in examples 1 to 8 and comparative example 1

	Flexural strength f_{f average}/MPa	Compressive strength p_Average/MPa
			Example 1	20.3	122.6
Example 2	17.6	116.5
			Example 3	19.7	119.6
Example 4	18.5	118.6
			Example 5	19.5	119.3
Example 6	19.8	120.4
			Example 7	19.6	119.1
Example 8	20.2	122.6
			Comparative example 1	15.2	102.4

By combining the data in examples 1-3, comparative example 1 and table 1, it can be seen that when the total weight ratio of the copper tailings to the waste concrete is 65%, the obtained inorganic artificial stone has better flexural strength and compressive strength, the flexural strength can reach 20.3MPa, and the compressive strength can reach 122.6 MPa. When the total weight ratio of the copper tailings to the waste concrete is 60%, the flexural strength and the compressive strength of the prepared inorganic artificial stone are reduced compared with those of the inorganic artificial stone in example 1, the flexural strength is 17.6MPa, the compressive strength is 116.5MPa, and the stone is easy to crack in the demolding process. When the total weight of the copper tailings and the waste concrete accounts for 70%, the flexural strength and the compressive strength of the prepared inorganic artificial stone are slightly reduced compared with those of the inorganic artificial stone in example 1, the flexural strength is 19.7MPa, and the compressive strength is 119.6 MPa. When the total weight of the copper tailings and the waste concrete accounts for 75%, the materials are greatly blocked in the stirring process and are difficult to stir uniformly, the flexural strength and the compressive strength of the prepared inorganic artificial stone are greatly reduced compared with those of the inorganic artificial stone in example 1, the flexural strength is only 15.2MPa, and the compressive strength is only 102.4 MPa.

It can be seen from the data in examples 1, 4-7 and table 1 that the inorganic artificial stone prepared in examples 4-7 also has excellent flexural strength and compressive strength, but when the weight ratio of the copper tailings is 50% and the weight ratio of the waste concrete is 15%, the flexural strength and compressive strength of the prepared inorganic artificial stone are more excellent.

It can be seen from the data in examples 1 and 8 and table 1 that the flexural strength and compressive strength of the inorganic artificial stone prepared by adding the pigment to the raw materials are not significantly changed compared to the inorganic artificial stone without the pigment, and it is known that the flexural strength and compressive strength of the prepared inorganic artificial stone are not substantially affected by the addition of 1% of the pigment.

In conclusion, when the total weight of the copper tailings and the waste concrete accounts for 65%, the weight of the copper tailings accounts for 50%, and the weight of the waste concrete accounts for 15%, the flexural strength and the compressive strength of the prepared inorganic artificial stone are better.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. The environment-friendly inorganic artificial stone is characterized by comprising the following components in percentage by weight: 40-65% of copper tailings, 5-25% of waste concrete, 22-30% of cement, 4-6% of water, 0.5-2% of water reducing agent, 1-3% of additive and 0-1% of pigment, wherein the total ratio of the copper tailings to the waste concrete is not more than 70%.

2. An environmentally friendly inorganic artificial stone according to claim 1, wherein: the particle size distribution of the copper tailings is as follows according to the weight percentage: 7-9% of 20-40 meshes, 17-19% of 40-80 meshes, 14-16% of 80-140 meshes, 13-15% of 140 meshes, 3-5% of 200 meshes and 40-42% above 250 meshes.

3. An environmentally friendly inorganic artificial stone according to claim 1, wherein: the particle size range of the waste concrete is 20-40 meshes.

4. An environmentally friendly inorganic artificial stone according to claim 1, wherein: the water reducing agent is a polycarboxylic acid water reducing agent with solid content of 20-40%.

5. An environmentally friendly inorganic artificial stone according to claim 1, wherein: the additive is styrene-butadiene emulsion with the solid content of 40-50%.

6. An environmentally friendly inorganic artificial stone according to claim 1, wherein: the pigment is one or a combination of more of titanium dioxide, iron black powder, iron red powder, iron yellow powder and iron brown powder.

7. A method for producing environmentally friendly inorganic artificial stone as set forth in any one of claims 1 to 6, characterized by comprising the steps of:

8. The method for producing environmentally friendly inorganic artificial stone according to claim 7, wherein: the stirring frequency in S1 is 13-17Hz, the stirring time is 1-2min, the stirring frequency in S2 is 65-75Hz, the stirring time is 2-3min, the stirring frequency in S3 is 30-40Hz, the stirring time is 2-4min, the stirring frequency in S4 is 65-75Hz, and the stirring time is 2-3 min.

9. The method for producing environmentally friendly inorganic artificial stone according to claim 7, wherein: s5, vacuum vibration pressing is adopted for molding, the vacuumizing time is 30-60S, the absolute vacuum degree is 0.09-0.1MPa, the pressure is 300 tons, the vibration frequency is 40-50Hz, and the pressing time is 2-3 min.

10. The method for producing environmentally friendly inorganic artificial stone according to claim 7, wherein: the steam curing temperature in S6 is 70-80 ℃.