An inorganic microcrystalline board for decoration

Abstract

The present invention relates to a decorative inorganic microcrystalline plate, characterized in that the raw material components are as follows: quartz sand is 23-27%, anhydrous sodium carbonate is 10-11%, sodium fluorosilicate is 4-6%, sodium borate decahydrate is 2-3%, smithsonite is 2.5-3%, sodium pyrophosphate is 1.5-2%, anhydrous barium sulfate is 1-1.5%, porous graphene micron flower is 0.05-0.15%, and the balance is hot high-titanium blast furnace slag. The process flow of the present application is simple, and the advanced all-electric melting technology is adopted. The decorative microcrystalline plate produced has the characteristics of good crystallization state, high yield rate, wide adjustable thickness range, etc., which can meet the diversified market needs; it can save energy and reduce consumption, and can save energy by nearly 35% compared with the traditional cold material production process of decorative microcrystalline plate, and can produce good economic and social benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of decorative microcrystalline building materials, and specifically, to an inorganic microcrystalline board for decoration. Background Art

[0002] A large amount of metallurgical slag by-products are generated during the smelting process in the iron and steel industry. Among them, blast furnace slag accounts for more than 25% of the molten iron output, with a temperature of about 1550 °C. The sensible heat of 1 ton of blast furnace molten slag is roughly equivalent to the heat of 64 kg of standard coal. At present, the water quenching treatment process is still mainly used for blast furnace slag. During the water quenching treatment process, the sensible heat of the molten slag is completely carried away by low-temperature water vapor and slag flushing water, which is not only wasted but also pollutes the environment. The water quenched slag is used as raw material for cement or directly micronized to replace cement, but its selling price is relatively low and the added value is not high.

[0003] The blast furnace slag building microcrystalline board not only has excellent wear resistance, but also is superior to natural stone and high-grade wall and floor tiles in terms of gloss, weather resistance, chemical resistance, and impact resistance. It is currently recognized as a good new type of high-quality building decoration material that can replace natural granite and high-grade wall and floor tiles.

[0004] The traditional technology for preparing inorganic microcrystalline boards for decoration consumes a large amount of energy and resources, while using hot blast furnace slag to manufacture decorative microcrystalline glass can make full use of the heat of the hot molten slag for production, with obvious advantages in energy conservation and emission reduction. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an inorganic microcrystalline board for decoration and its preparation method.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] An inorganic microcrystalline board for decoration, the mass percentage of its raw material components is: quartz sand is 23 - 27%, anhydrous sodium carbonate is 10 - 11%, sodium fluorosilicate is 4 - 6%, sodium borate decahydrate is 2 - 3%, smithsonite is 2.5 - 3%, sodium pyrophosphate is 1.5 - 2%, anhydrous barium sulfate is 1 - 1.5%, porous graphene microflowers is 0.05 - 0.15%, and the balance is hot high-titanium blast furnace slag.

[0008] The porous graphene microflowers is 0.05 - 0.08%.

[0009] The porous graphene microflowers is 0.1 - 0.15%.

[0010] In the raw materials of the microcrystalline board, quartz sand accounts for 25%, anhydrous sodium carbonate accounts for 10.5%, sodium fluorosilicate accounts for 5%, sodium tetraborate decahydrate accounts for 2.6%, smithsonite accounts for 2.8%, sodium pyrophosphate accounts for 1.7%, anhydrous barium sulfate accounts for 1.3%, porous graphene microflowers account for 0.1%, and the balance is hot high-titanium blast furnace slag.

[0011] For the hot high-titanium blast furnace slag mentioned above, its component composition by mass percentage is as follows: SiO2 is 31 - 33%, Al2O3 is 15 - 17%, CaO is 40 - 42%, MgO is 7 - 8%, Fe2O3 is 0.5 - 1%, MnO is 0.1 - 0.3%, TiO2 is 1 - 3%, P2O5 is 0.1 - 1.5%, BaO is 0.01 - 0.5%, and S is 0.1 - 1.5%.

[0012] The SiO2 content of the quartz sand is ≥98%; the anhydrous sodium carbonate is of industrial grade; the sodium fluorosilicate is of industrial grade; the sodium tetraborate decahydrate is of industrial grade; the smithsonite is of industrial grade, and the ZnO content is ≥57%; the sodium pyrophosphate is of industrial grade; the anhydrous barium sulfate is of industrial grade.

[0013] In the microcrystalline board mentioned above, 57% ≥ SiO2 + Al2O3 content ≥ 52%, S content ≥ 0.5%, F content ≥ 2%, and ZnO content ≥ 1.5%.

[0014] For the microcrystalline board mentioned above, it is melted in a fully electric glass furnace equipped with bottom-inserted and side-inserted electrodes; it is formed by the overflow rolling method process, and the flatness of the board surface is achieved by stretching on the roller table after rolling.

[0015] For the hot high-titanium blast furnace slag mentioned above, it is transported by a slag ladle.

[0016] The inorganic microcrystalline board is visually white.

[0017] In the combination of crystal nucleating agents F, P, Ti, and sulfides of the present invention, F is mainly used, a small amount of P is added for supplementation, and the Ti contained in the hot high-titanium blast furnace slag and the generated ZnS are used for color masking, so that the board presents white and has assistance. During the crystallization process of the board with the combination of multiple crystal nucleating agents, the grains of different particle sizes produced are mutually extruded to form a dense crystal and hinder the generation of large-particle-size grains, thereby realizing the full crystallization of the board. While the grains are fine and dense, they present a visually white texture, and as a decorative building material, it has a good user sensory experience and enhances user attraction and attention.

[0018] The present invention adds a small amount of anhydrous barium sulfate to increase the refractive index, density, gloss and chemical stability of the microcrystalline plate, and can accelerate the melting process of the glass. When the addition amount is greater than 1.5%, it shows that the clarification process of the glass body is hindered, so the addition amount of the present invention is 1-1.5%. The purpose of adding 0.05-0.15% porous graphene micron flowers is to regulate the persistent, stable and efficient reducing atmosphere during the melt melting process, and the price is relatively low, so as to promote the reaction of S with Fe and Zn, and inhibit the reaction of S with O to generate SO2 gas, resulting in the formation of large-diameter pores in the microcrystalline plate, resulting in unqualified products.

[0019] The present invention is composed of a multi-component composite crystal nucleating agent system, which reduces the addition of F and the release of S, reduces the amount of harmful gas to be treated, reduces the cost of environmental protection disposal, and accelerates the vitrification process of the melt. It has good material properties, is convenient for overflow calendering process production and stretching of the plate through the roller speed difference after calendering, increases the flatness of the plate, and reduces the cost of the back-end grinding process. It also avoids the problem that the lip brick part is easy to crystallize when the traditional microcrystalline glass is directly calendered.

[0020] Compared with the prior art, the present invention has the following positive effects:

[0021] (1) The process is simple and uses advanced all-electric melting technology. The decorative microcrystalline panels produced have good crystallization state, high yield rate, and wide adjustable thickness range, which can meet diverse market needs;

[0022] (2) Energy saving and consumption reduction: compared with the traditional cold material production process of decorative microcrystalline sheet, it can save energy by nearly 35%, which can generate good economic and social benefits;

[0023] (3) Decorative materials produced using hot slag from blast furnaces meet the requirements of "environmentally compatible materials" both in terms of the product itself and the manufacturing process. The technology for commercializing hot slag from blast furnaces focuses on the recovery of slag sensible heat while also fully considering the utilization of effective components in slag liquid, which not only saves the energy consumed by secondary melting of slag, but also greatly reduces the production cost of the product, saving resources and energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The inorganic microcrystalline sheet diagram of the present application; DETAILED DESCRIPTION

[0025] The following provides a specific implementation of a decorative inorganic microcrystalline plate of the present invention.

[0026] Please see attached Figure 1 The raw material components of the decorative inorganic microcrystalline plates of Examples 1 to 6 and Comparative Examples 1 to 4 are shown in Table 1 by mass fraction.

[0027] Table 1 Raw material composition of Examples 1-6 and Comparative Examples 1-4, wt%

[0028]

[0029] An inorganic microcrystalline plate for decoration of the present invention meets the requirements of the physical and chemical indexes in the standard of "JC / T 872-2019 Microcrystalline Glass for Building Decoration".

[0030] The inorganic microcrystalline plates of Examples 1-6 and Comparative Examples 1-4 were subjected to component analysis and detection, and the detection results are shown in Table 2.

[0031] Table 2 Erosion results of Examples 1-6 and Comparative Examples 1-4

[0032]

[0033] In Comparative Example 1, the content of anhydrous barium sulfate was 2%, which was on the high side, introducing too much S into the melt. Under the reducing atmosphere conditions of the present invention, part of the large-diameter SO2 bubbles were generated in the forming stage of the glass melt, with an average number of 16 bubbles / m 2 , resulting in the product not meeting the requirement of "bubbles ≥ 10 bubbles / m" in the standard of "JC / T 872-2019 Microcrystalline Glass for Building Decoration", and the product was unqualified. 2

[0034] In Comparative Example 2, the content of smithsonite was 1.5%, which was on the low side, and the ZnO content in the finished product was 0.90%, weakening the color masking effect of Zn element. The visual color of the microcrystalline plate was gray, reducing the visual aesthetic feeling and being not conducive to sales.

[0035] In Comparative Example 3, the content of porous graphene microflowers was 0.02%, which was on the low side, resulting in a significant reduction in the intensity of the reducing atmosphere in the melt. A large amount of S in the melt generated SO2 gas. Part of it entered the flue gas system, part of it formed bubbles in the glass body, and the rest formed ZnS and FeS. Therefore, the color masking effect of ZnS was weakened, and the large-diameter bubbles in the microcrystalline plate also increased significantly, having an adverse impact on both the product quality and the visual aesthetic feeling.

[0036] In Comparative Example 4, the content of sodium fluorosilicate was 3.5%, which was on the low side, and the F content in the finished product was 1.81%. The reduction of the nucleating agent F weakened the crystallization ability of the microcrystalline plate. The adverse factors were manifested as the phenomenon of edge collapse in the crystallized plate, reducing the flatness of the microcrystalline plate during the crystallization process in the roller hearth kiln and increasing the grinding and polishing cost.

[0037] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as within the protection scope of the present invention.​

Claims

1. An inorganic microcrystalline board for decoration, characterized in that, The mass percentages of its raw material components are as follows: quartz sand is 23 - 27%, anhydrous sodium carbonate is 10 - 11%, sodium fluorosilicate is 4 - 6%, sodium borate decahydrate is 2 - 3%, smithsonite is 2.5 - 3%, sodium pyrophosphate is 1.5 - 2%, anhydrous barium sulfate is 1 - 1.5%, porous graphene microflowers is 0.05 - 0.15%, and the balance is hot high-titanium blast furnace slag; For the said hot high-titanium blast furnace slag, the mass percentages of its component composition are as follows: SiO2 is 31 - 33%, Al2O3 is 15 - 17%, CaO is 40 - 42%, MgO is 7 - 8%, Fe2O3 is 0.5 - 1%, MnO is 0.1 - 0.3%, TiO2 is 1 - 3%, P2O5 is 0.1 - 1.5%, BaO is 0.01 - 0.5%, and S is 0.1 - 1.5%.

2. The inorganic microcrystalline plate for decoration according to claim 1, characterized in that, The said porous graphene microflowers is 0.05 - 0.08%.

3. The inorganic microcrystalline board for decoration according to claim 1, wherein The said porous graphene microflowers is 0.08 - 0.1%.

4. The decorative inorganic microcrystalline board according to claim 1, characterized in that, The said porous graphene microflowers is 0.1 - 0.15%.

5. The decorative inorganic microcrystalline board according to claim 1, wherein, In the raw materials of the said microcrystalline board, quartz sand is 25%, anhydrous sodium carbonate is 10.5%, sodium fluorosilicate is 5%, sodium borate decahydrate is 2.6%, smithsonite is 2.8%, sodium pyrophosphate is 1.7%, anhydrous barium sulfate is 1.3%, porous graphene microflowers is 0.1%, and the balance is hot high-titanium blast furnace slag.

6. The decorative inorganic microcrystalline sheet according to claim 1, wherein, The SiO2 content of the said quartz sand ≥ 98%; anhydrous sodium carbonate is industrial grade; sodium fluorosilicate is industrial grade; sodium borate decahydrate is industrial grade; smithsonite is industrial grade with ZnO content ≥ 57%; sodium pyrophosphate is industrial grade; anhydrous barium sulfate is industrial grade.

7. The preparation method of an inorganic microcrystalline board for decoration according to claim 1, characterized in that, For the said microcrystalline board, melting is carried out in a fully electric glass furnace equipped with bottom-inserted electrodes and side-inserted electrodes; it is formed by the overflow rolling method process, and the flatness of the board surface is achieved by supplementing with post-rolling roller stretching.

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