CN111848185A - Temperature-adjusting slurry for reducing firing temperature of spot brick, spot brick and manufacturing method thereof - Google Patents

Temperature-adjusting slurry for reducing firing temperature of spot brick, spot brick and manufacturing method thereof Download PDF

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CN111848185A
CN111848185A CN202010552589.1A CN202010552589A CN111848185A CN 111848185 A CN111848185 A CN 111848185A CN 202010552589 A CN202010552589 A CN 202010552589A CN 111848185 A CN111848185 A CN 111848185A
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temperature
spot
slurry
brick
percent
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CN111848185B (en
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张武
刘传军
龙友福
何子权
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Guangdong Jia Mei Ceramic Co
Dongguan City Wonderful Ceramics Industrial Park Co Ltd
Jiangxi Hemei Ceramics Co Ltd
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Guangdong Jia Mei Ceramic Co
Dongguan City Wonderful Ceramics Industrial Park Co Ltd
Jiangxi Hemei Ceramics Co Ltd
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract

The invention discloses a temperature-adjusting slurry for reducing the firing temperature of a spot brick, the spot brick and a manufacturing method thereof, wherein the temperature-adjusting slurry comprises, by mass, 48-52% of talc particles; 18 to 22 percent of magnesia; 28 to 32 percent of sodium huoshi sand. The mud raw materials with high aluminum content, low magnesium content, low iron content and good plasticity are adopted in the temperature-adjusting slurry, so that the spot bricks are influenced by the added spot particles, the firing temperature of the spot bricks is increased, and then the firing temperature of the spot bricks is effectively reduced by adding the temperature-adjusting slurry, so that the stability of the firing temperature of the spot bricks is maintained, the product color repeatability among different batches of spot bricks is improved, the production continuity is ensured, and the production efficiency is improved; the method can stabilize the firing temperature of the spot brick, simultaneously does not influence the whiteness of the spot brick, and can synchronously improve the strength of the spot brick.

Description

Temperature-adjusting slurry for reducing firing temperature of spot brick, spot brick and manufacturing method thereof
Technical Field
The invention relates to the field of production of building ceramic spot bricks, in particular to temperature-adjusting slurry for reducing firing temperature of spot bricks, a spot brick and a manufacturing method thereof.
Background
With the development of the architectural ceramic industry, the architectural ceramic decoration technology is no longer limited to tile surface pattern decoration, and the flow of spot tiles (spot ceramic tiles, which add spot particles with various colors into a blank) is gradually increased.
In the production process of the existing spot brick, spot particles with different colors are required to be added into basic slurry of the spot brick, and the added spot particles can change the chemical component content of the basic slurry, so that the firing temperature (blank temperature) of the spot brick is influenced, and the firing temperature of the spot brick is increased; furthermore, the kiln temperature required by different batches of spot bricks is different due to the fluctuation of the firing temperature of the spot bricks, so that the production stability and continuity are influenced, and the kiln temperature needs to be adjusted frequently; however, the adjustment of the kiln temperature has certain time delay and fluctuation, and the adjustment to different kiln temperatures corresponding to different firing temperatures is difficult to accurately and quickly, so that the production efficiency of the spot bricks is inevitably affected, the product yield is reduced, and the product colors of different batches of spot brick products are also different.
Therefore, how to provide the spot particles which can prevent the firing temperature of the spot brick from being increased is a technical problem to be solved urgently.
The prior art has defects and needs to be improved and developed.
Disclosure of Invention
In view of the above-mentioned disadvantages of the prior art, the present invention aims to provide a temperature control slurry for reducing the firing temperature of a spot brick, a spot brick and a method for manufacturing the same, which aims to solve the problem that the firing temperature of the spot brick is too low due to spot particles in the production of the prior spot brick.
In order to solve the technical problems, the invention provides the following technical scheme: the temperature-adjusting slurry for reducing the firing temperature of the spot brick comprises the following raw materials in percentage by mass:
48-52% of talc particles; 18 to 22 percent of magnesia; 28 to 32 percent of sodium huoshi sand.
Further, the temperature-adjusting slurry comprises the following raw materials in percentage by mass:
50% of talcum particles; 20% of magnesia; 30 percent of sodium huoshan sand.
Further, SiO248.58％；Al2O334.91％；Fe2O31.36％；CaO 0.20％；MgO 0.65％；K2O 1.71％；Na20.19 percent of O; the loss on ignition is 12.40 percent.
Further, the chemical composition of the magnesia comprises, by mass:
SiO266.72％；Al2O32.87％；Fe2O30.50％；CaO 0.28％；MgO 24.35％；K2O0.17％；Na20.20 percent of O; the loss on ignition is 4.91%.
Further, the chemical composition of the sodium huoshan sand comprises, by mass:
SiO274.34％；Al2O314.37％；Fe2O30.17％；CaO 0.85％；MgO 0.40％；K2O0.27％；Na2o8.41 percent; the loss on ignition is 1.19%.
Further, the temperature adjusting slurry is processed through a ball milling process;
the glaze slurry fineness of the temperature-adjusting slurry is calculated by a 325-mesh sieve, and the screen residue is 1.0-1.4%;
The viscosity of the temperature adjusting slurry is 40-100 seconds;
the specific gravity of the temperature-adjusting pulp is not less than 1.67;
the moisture content in the temperature-adjusting pulp is 39% -41%.
Further, the addition amount of the temperature adjusting pulp is 0.09-1.0% by mass percent.
In order to solve the above technical problems, the present invention provides another technical solution as follows: a method for manufacturing a spot brick, wherein the method for manufacturing the spot brick comprises the step of adding the temperature-adjusting slurry for reducing the firing temperature of the spot brick.
In order to solve the above technical problems, the present invention provides another technical solution as follows: a spot brick, wherein the spot brick comprises the temperature-adjusting slurry for reducing the firing temperature of the spot brick.
Has the advantages that: the invention provides a temperature-adjusting slurry for reducing the firing temperature of a spot brick, the spot brick and a manufacturing method thereof, wherein the raw material of the temperature-adjusting slurry comprises, by mass, 48-52% of talc particles; 18 to 22 percent of magnesia; 28 to 32 percent of sodium huoshi sand. The mud raw materials with high aluminum content, low magnesium content, low iron content and good plasticity are adopted in the temperature-adjusting slurry, so that the spot bricks are influenced by the added spot particles, the firing temperature of the spot bricks is increased, and then the firing temperature of the spot bricks is effectively reduced by adding the temperature-adjusting slurry, so that the stability of the firing temperature of the spot bricks is maintained, the product color repeatability among different batches of spot bricks is improved, the production continuity is ensured, and the production efficiency is improved; the method can stabilize the firing temperature of the spot brick, simultaneously does not influence the whiteness of the spot brick, and can synchronously improve the strength of the spot brick.
Detailed Description
The present invention provides a temperature control slurry for reducing the firing temperature of a spot brick, a spot brick and a method for manufacturing the same, and the present invention will be described in further detail below in order to make the object, technical scheme and effect of the present invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
With the development of the architectural ceramic industry, the architectural ceramic decoration technology is no longer limited to tile surface pattern decoration, and the color flow of spot bricks (spot ceramic tiles, spot particles with various colors are added into blanks) and full-body bricks (the colors of the blanks and the tile surfaces are kept consistent) begins to gradually occupy the trend. As for the spot brick, the product types are more, and the firing temperature fluctuation (the firing temperature is increased) is frequent due to the added spot particles in the production process, thereby influencing the production stability and continuity. In particular, several problems often encountered in the production of spot tiles are:
1) temperature fluctuation of base slurry
In order to deal with the spot bricks with different colors, the basic slurry of the spot bricks is divided into the following components according to the whiteness difference: dark white, light white, super white and high white. In actual production, the reserve amount of slurry with various whiteness needs to be adjusted according to the production scheduling (production plan), but is limited by the number of slurry pools and the number of ball mills, and different formulas are ground by changing balls frequently, so that the temperature difference between different batches of the same basic slurry is large.
2) The firing temperature fluctuation of the spot brick caused by adding spot particles with different colors
In the production process of the spot brick, spot particles with various colors are required to be added into the basic slurry of the spot brick, and the added spot particles can change the chemical components and the content of a green body of the spot brick and further change the firing temperature of the spot brick.
In conclusion, in the production process of the spot brick, spot particles with different colors need to be added into the basic slurry of the spot brick, and the added spot particles can change the chemical component content of the basic slurry, so that the firing temperature (blank temperature) of the spot brick is influenced, and the firing temperature of the spot brick is increased; furthermore, the kiln temperature required by different batches of spot bricks is different due to the fluctuation of the firing temperature of the spot bricks, so that the production stability and continuity are influenced, and the kiln temperature needs to be adjusted frequently; however, the adjustment of the kiln temperature has certain time delay and fluctuation, and the adjustment to different kiln temperatures corresponding to different firing temperatures is difficult to accurately and quickly, so that the production efficiency of the spot bricks is inevitably affected, the product yield is reduced, and the product colors of different batches of spot brick products are also different.
The invention provides temperature-adjusting slurry for reducing the firing temperature of a spot brick, the spot brick and a manufacturing method thereof based on the technical problems in the prior art; the temperature-adjusting slurry comprises the following raw materials in percentage by mass: 48-52% of talc particles; 18 to 22 percent of magnesia; 28 to 32 percent of sodium huoshi sand. It can be understood that the mud raw materials with high aluminum content, low magnesium content, low iron content and good plasticity are adopted in the temperature-adjusting slurry provided by the invention, so that the firing temperature of the spot brick is effectively reduced by adding the temperature-adjusting slurry after the spot brick is influenced by the added spot particles and the firing temperature of the spot brick is increased, the stability of the firing temperature of the spot brick is further maintained, the product color repeatability among different batches of spot bricks is improved, the production continuity is ensured, and the production efficiency is improved; the strength of the spot brick can be simultaneously improved without affecting the whiteness of the spot brick while stabilizing the firing temperature of the spot brick, and the following examples are specifically referred to.
The invention provides temperature-adjusting slurry for reducing the firing temperature of a spot brick, wherein the temperature-adjusting slurry comprises the following raw materials in percentage by mass:
48-52% of talc particles; 18 to 22 percent of magnesia; 28 to 32 percent of sodium huoshi sand.
It can be understood that the temperature-adjusting slurry for reducing the firing temperature of the spot brick provided by the invention adopts a mud raw material with high aluminum content, low magnesium content, low iron content and good plasticity, so that the firing temperature of the spot brick is effectively reduced by adding the temperature-adjusting slurry after the firing temperature of the spot brick is increased under the influence of the added spot particles, thereby maintaining the stability of the firing temperature of the spot brick, improving the product color repeatability among different batches of spot bricks, ensuring the production continuity and improving the production efficiency; the method can stabilize the firing temperature of the spot brick, simultaneously does not influence the whiteness of the spot brick, and can synchronously improve the strength of the spot brick.
In some preferred embodiments, the raw materials of the temperature-adjusting slurry comprise, by mass:
50% of talcum particles; 20% of magnesia; 30 percent of sodium huoshan sand.
In some preferred embodiments, the chemical composition of the temperature-adjusting slurry comprises, in mass percent:
SiO260.18％；Al2O35.96％；Fe2O30.40％；CaO 0.76％；MgO 22.36％；K2O0.24％；Na2O2.65 percent; the loss on ignition is 7.45 percent.
In some preferred embodiments, the chemical composition of the talc particle comprises, in mass percent:
SiO250.12％；Al2O32.52％；Fe2O30.57％；CaO 0.89％；MgO 33.21％；K2O0.15％；Na20.21 percent of O; the loss on ignition is 12.33%.
In some preferred embodiments, the chemical composition of the magnesia comprises, in mass percent:
SiO266.72％；Al2O32.87％；Fe2O30.50％；CaO 0.28％；MgO 24.35％；K2O0.17％；Na20.20 percent of O; the loss on ignition is 4.91%.
In some preferred embodiments, the chemical composition of the sodium hudroxide sand comprises, in mass percent:
SiO274.34％；Al2O314.37％；Fe2O30.17％；CaO 0.85％；MgO 0.40％；K2O0.27％；Na2o8.41 percent; the loss on ignition is 1.19%.
In some preferred embodiments, the conditioning slurry is processed by a ball milling process;
the glaze slurry fineness of the temperature-adjusting slurry is calculated by a 325-mesh sieve, and the screen residue is 1.0-1.4%;
the viscosity of the temperature adjusting slurry is 40-100 seconds;
the specific gravity of the temperature-adjusting pulp is not less than 1.67;
the moisture content in the temperature-adjusting pulp is 39% -41%.
In some preferred embodiments, the addition amount of the temperature-adjusting slurry is 0.09-1.0% by mass percentage.
The invention also provides a method for manufacturing the spot brick, wherein the method for manufacturing the spot brick comprises the step of adding the temperature-adjusting slurry for reducing the firing temperature of the spot brick.
It can be understood that the step of adding the temperature-adjusting slurry in the above embodiment of the present invention is added in the method for manufacturing the spot brick, so that the kiln temperature does not need to be adjusted according to the firing temperature of the spot brick to which the spot particles are added, the stability of the firing temperature of the spot brick can be maintained only by adding the temperature-adjusting slurry, the spot brick can be continuously produced without adjusting the kiln temperature, and the repeatability among different batches of spot bricks is good, the product color is good, and the yield is high.
The invention also provides a spot brick, wherein the spot brick comprises the temperature-adjusting slurry for reducing the firing temperature of the spot brick.
The spot brick provided by the invention has the advantages that the firing temperature of the spot brick is effectively reduced by adding the temperature-adjusting slurry after the firing temperature of the spot brick is increased under the influence of the added spot particles, so that the stability of the firing temperature of the spot brick is maintained, the color repeatability of the spot bricks in different batches is improved, the production continuity is ensured, and the production efficiency is improved; the method can stabilize the firing temperature of the spot brick, simultaneously does not influence the whiteness of the spot brick, and can synchronously improve the strength of the spot brick.
The present invention will be described in further detail with reference to specific examples.
The first embodiment is as follows:
the embodiment provides temperature adjusting slurry for reducing firing temperature of a spot brick, wherein the temperature adjusting slurry comprises the following raw materials in percentage by mass:
48-52% of talc particles; 18 to 22 percent of magnesia; 28 to 32 percent of sodium huoshi sand.
It can be understood that the temperature-adjusting slurry provided by the invention adopts a mud raw material with good fluxing effect, so that the spot brick is influenced by the added spot particles, the firing temperature of the spot brick is increased, and then the firing temperature of the spot brick is effectively reduced by adding the temperature-adjusting slurry, so that the stability of the firing temperature of the spot brick is maintained, the quality color repeatability among different batches of spot bricks is improved, the production continuity is ensured, and the production efficiency is improved; the method can stabilize the firing temperature of the spot brick, simultaneously does not influence the whiteness of the spot brick, and can synchronously improve the strength of the spot brick.
Example two:
the present embodiment provides a temperature control slurry for reducing the firing temperature of a spot brick, which is different from the above embodiments in that: the temperature-adjusting slurry comprises the following raw materials in percentage by mass:
50% of talcum particles; 20% of magnesia; 30 percent of sodium huoshan sand.
It can be understood that the temperature-adjusting slurry provided by the invention adopts a mud raw material with high aluminum content, low magnesium content, low iron content and good fluxing effect, so that the firing temperature of the spot brick is effectively reduced by adding the temperature-adjusting slurry after the spot brick is influenced by the added spot particles and the firing temperature of the spot brick is increased, the stability of the firing temperature of the spot brick is further maintained, the product color repeatability among different batches of spot bricks is improved, the production continuity is ensured, and the production efficiency is improved; the method can stabilize the firing temperature of the spot brick, simultaneously does not influence the whiteness of the spot brick, and can synchronously improve the strength of the spot brick.
Example three:
the embodiment provides a temperature regulation slurry for reducing the firing temperature of a spot brick, and the chemical composition of the temperature regulation slurry comprises the following components in percentage by mass:
SiO260.18％；Al2O35.96％；Fe2O30.40％；CaO 0.76％；MgO 22.36％；K2O0.24％；Na2o2.65 percent; the loss on ignition is 7.45 percent.
Example four:
the embodiment provides a temperature regulation slurry for reducing the firing temperature of a spot brick, and the temperature regulation slurry comprises the following raw materials in percentage by mass:
48-52% of talc particles; 18 to 22 percent of magnesia; 28 to 32 percent of sodium huoshi sand.
The chemical composition of the talc particles comprises the following components in percentage by mass:
SiO250.12％；Al2O32.52％；Fe2O30.57％；CaO 0.89％；MgO 33.21％；K2O0.15％；Na20.21 percent of O; the loss on ignition is 12.33%.
Example five:
the embodiment provides a temperature regulation slurry for reducing the firing temperature of a spot brick, and the temperature regulation slurry comprises the following raw materials in percentage by mass:
48-52% of talc particles; 18 to 22 percent of magnesia; 28 to 32 percent of sodium huoshi sand.
The chemical composition of the magnesia comprises the following components in percentage by mass:
SiO266.72％；Al2O32.87％；Fe2O30.50％；CaO 0.28％；MgO 24.35％；K2O0.17％；Na20.20 percent of O; the loss on ignition is 4.91%.
Example six:
the embodiment provides a temperature regulation slurry for reducing the firing temperature of a spot brick, and the temperature regulation slurry comprises the following raw materials in percentage by mass:
48-52% of talc particles; 18 to 22 percent of magnesia; 28 to 32 percent of sodium huoshi sand.
The sodium-favoured sand comprises the following chemical components in percentage by mass:
SiO274.34％；Al2O314.37％；Fe2O30.17％；CaO 0.85％；MgO 0.40％；K2O0.27％；Na2o8.41 percent; the loss on ignition is 1.19%.
Example seven:
the embodiment provides temperature-adjusting slurry for reducing the firing temperature of spot bricks, which is consistent with the sixth embodiment in that the temperature-adjusting slurry is processed by a ball milling process;
the glaze slurry fineness of the temperature-adjusting slurry is calculated by a 325-mesh sieve, and the screen residue is 1.0-1.4%;
The viscosity of the temperature adjusting slurry is 40-100 seconds;
the specific gravity of the temperature-adjusting pulp is not less than 1.67;
the moisture content in the temperature-adjusting pulp is 39% -41%.
Example eight:
the embodiment provides a temperature regulation slurry for reducing the firing temperature of a spot brick, and the temperature regulation slurry comprises the following raw materials in percentage by mass:
48-52% of talc particles; 18 to 22 percent of magnesia; 28 to 32 percent of sodium huoshi sand.
The addition amount of the temperature-adjusting slurry is 0.09-1.0% by mass percent.
It can be understood that the addition amount of the spot temperature adjusting slurry in the basic slurry of the spot brick is 0.09-1.0 percent by mass percent.
Example nine:
provided is a method for manufacturing a spot brick, wherein the method for manufacturing a spot brick comprises a step of adding the temperature-adjusting slurry for reducing the firing temperature of the spot brick.
The addition amount of the spot temperature adjusting slurry in the basic slurry of the spot brick is 0.09-1.0% by mass percent.
It can be understood that the step of adding the temperature-adjusting slurry in the above embodiment of the present invention is added in the method for manufacturing the spot brick, so that the kiln temperature does not need to be adjusted according to the firing temperature of the spot brick to which the spot particles are added, the stability of the firing temperature of the spot brick can be maintained only by adding the temperature-adjusting slurry, the spot brick can be continuously produced without adjusting the kiln temperature, and the repeatability among different batches of spot bricks is good, the product color is good, and the product yield is high.
Example ten:
the invention also provides a spot brick, wherein the spot brick comprises the temperature-adjusting slurry for reducing the firing temperature of the spot brick.
It can be understood that the invention provides a spot brick which is influenced by the added spot particles to increase the firing temperature, and then the temperature-adjusting slurry is added to effectively reduce the firing temperature of the spot brick, thereby maintaining the stability of the firing temperature of the spot brick; the method can stabilize the firing temperature of the spot brick, simultaneously does not influence the whiteness of the spot brick, and can synchronously improve the strength of the spot brick.
To better illustrate the use of the conditioning pastes of the examples of the invention for reducing the firing temperature of the tiles, the formed tiles were distinguished from the prior art and tested by the following method:
1. preparation of base slurry Standard
When the temperature of the common basic slurry blank is matched with the temperature of the kiln, a part of basic slurry is taken, dried and stored as a standard sample, and the firing state of the kiln is reflected by the water absorption of the standard sample. And pressing the standard sample and the slurry to be adjusted in temperature into small bricks at the same time when detecting the temperature of the blank every time, and firing the small bricks at the same time.
2. Preparation of temperature-regulating syrup
Feeding according to the formula of the temperature adjusting slurry, processing the temperature adjusting slurry through a ball milling process, and controlling the parameters of the processed temperature adjusting slurry to:
The glaze slurry fineness of the temperature-adjusting slurry is calculated by a 325-mesh sieve, and the screen residue is 1.0-1.4%;
the viscosity of the temperature adjusting slurry is 40-100 seconds;
the specific gravity of the temperature-adjusting pulp is not less than 1.67;
the moisture content in the temperature-adjusting pulp is 39% -41%.
3. Mud water absorption detection
Firstly, the influence on the blank temperature (firing temperature) and the water absorption of the spot brick is caused by adding pigment of the spot particles into the basic slurry, and the detailed description is shown in the following table 1;
TABLE 1 influence of speckle granule on Water absorption Rate
Figure BDA0002543119970000101
From table 1, it can be seen that the water absorption of the base slurry and the firing temperature are greatly affected by the speck particles (the water absorption of the corresponding product is different at different firing temperatures). Since the coloring material (mottle particles) used in different products is different, it is very difficult to reduce the influence of the mottle particles on the firing temperature by adjusting the base slurry in advance.
During detection, sampling the slurry prepared with the spot particles to be sprayed and pressing a small brick sample with a standard sample of the basic slurry; and respectively drying 300g of slurry, adding 11 g of water into 130g of dry materials, manually granulating until all materials pass through a 30-mesh sieve, and pressing 129g of powder into small bricks by using a small press. The pressed small brick sample needs to ensure the consistency of moisture and thickness as much as possible, and the error of water absorption ratio comparison is reduced.
The pressed small brick samples were placed in a 160 ℃ oven to dry completely for 20 minutes and fired in a large production kiln using alumina pads (involving a maximum kiln temperature of 1224 ℃ and a firing time of 47.5 minutes). The thickness of the used alumina backing plate is 8mm, the heat insulation effect is not obvious, and the firing state of the kiln can be reacted to a greater degree. And cooling the fired small brick sample, and then placing the cooled small brick sample into a vacuum water absorption tester to measure the water absorption (vacuumizing for 30 minutes, and draining and soaking for 15 minutes).
And comparing the measured water absorption value of the small brick sample with a standard sample, and adding the temperature-regulating slurry in a corresponding proportion. And re-sampling after the added temperature-regulating slurry is uniformly dispersed, and performing sample preparation and water absorption comparison again until the water absorption is adjusted to be close to that of the standard sample fired in the same batch.
4. Temperature regulation of spot brick
And 3, simultaneously pressing the base slurry with the temperature to be adjusted and the colored slurry added with the spot particles into small bricks, detecting the water absorption rate after sintering, and adding corresponding temperature-adjusting slurry according to the result of comparison with the standard sample. And re-sampling after the temperature-adjusting slurry is uniformly stirred, and repeating the steps until the error between the water absorption of the slurry to be measured and the water absorption of the standard sample is within plus or minus 0.02. The effect of the tempering pastes in actual production is shown in tables 2 and 5.
4.1. Application of temperature-adjusting pulp in basic pulp
Table 2 use of tempering slurries in base slurries
Figure BDA0002543119970000111
It should be noted that the above-mentioned basic pulp has the light white, super white and dark white formula components and contents known in the art, and the present invention is only directly applied to embody the effect of the temperature-adjusting pulp of the present invention. Specifically, the chemical composition analysis of the pale, ultra white and dark white is shown in table 3 below:
TABLE 3 chemical composition of pale and deep normal whites
Figure BDA0002543119970000112
Figure BDA0002543119970000121
Taking the light white base slurry as an example, after the temperature-adjusting slurries with different proportions are added, the chemical components of the base slurry of the spot brick are shown in the following table 4;
TABLE 4 influence of tempered pulps on the chemical composition of the pale plain base pulp
Figure BDA0002543119970000122
From table 4, it can be seen that the influence of the temperature-adjusting slurry on the chemical composition of the pale white base slurry is mainly in three aspects of aluminum content, magnesium content and potassium content, and the effect of adjusting the blank temperature is achieved by changing the components.
4.2. Application of temperature-regulating paste in color paste
Table 5 application of temperature-regulating pastes in color pastes
Figure BDA0002543119970000123
The color paste refers to a glaze slip obtained by adding spot particles into a spot brick, and the formula components and contents of zz6879 white, zz6879 light red and zz6879 light blue in the mud number are known in the art, and the color paste is only directly applied to embody the effect of the temperature-adjusting paste in the invention.
In summary, as can be seen from the above table 5, the effect of the conditioning slurry of the present invention is more obvious when the conditioning slurry is added by adding the speckle particles. When the water absorption of the base slurry standard sample is about 0.25, the water absorption can be increased by 0.1 percent by adding every 0.1 percent of the temperature-regulating slurry.
In summary, the invention provides a temperature adjusting slurry for reducing the firing temperature of a spot brick, the spot brick and a manufacturing method thereof, wherein the raw material of the temperature adjusting slurry comprises, by mass, 48-52% of talc particles; 18 to 22 percent of magnesia; 28 to 32 percent of sodium huoshi sand. The mud raw materials with high aluminum content, low magnesium content, low iron content and good plasticity are adopted in the temperature-adjusting slurry, so that the spot bricks are influenced by the added spot particles, the firing temperature of the spot bricks is increased, and then the firing temperature of the spot bricks is effectively reduced by adding the temperature-adjusting slurry, so that the stability of the firing temperature of the spot bricks is maintained, the product color repeatability among different batches of spot bricks is improved, the production continuity is ensured, and the production efficiency is improved; the method can stabilize the firing temperature of the spot brick, simultaneously does not influence the whiteness of the spot brick, and can synchronously improve the strength of the spot brick.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims (10)

1. The temperature-adjusting slurry for reducing the firing temperature of the spot brick is characterized by comprising the following raw materials in percentage by mass:
48-52% of talc particles; 18 to 22 percent of magnesia; 28 to 32 percent of sodium huoshi sand.
2. The temperature-adjusting slurry for reducing the firing temperature of the spot brick as claimed in claim 1, wherein the temperature-adjusting slurry comprises the following raw materials in percentage by mass:
50% of talcum particles; 20% of magnesia; 30 percent of sodium huoshan sand.
3. The temperature-regulating slurry for reducing the firing temperature of the spot brick as claimed in claim 2, wherein the chemical composition of the temperature-regulating slurry comprises, in mass percent:
SiO260.18％；Al2O35.96％；Fe2O30.40％；CaO 0.76％；MgO 22.36％；K2O 0.24％；Na2o2.65 percent; the loss on ignition is 7.45 percent.
4. The temperature-regulating slurry for reducing the firing temperature of a spot brick as claimed in claim 2, wherein the chemical composition of the talc particle comprises, in mass percent:
SiO250.12％；Al2O32.52％；Fe2O30.57％；CaO 0.89％；MgO 33.21％；K2O 0.15％；Na20.21 percent of O; the loss on ignition is 12.33%.
5. The temperature-regulating slurry for reducing the firing temperature of the spot brick as claimed in claim 2, wherein the chemical composition of the magnesia comprises, in mass percent:
SiO266.72％；Al2O32.87％；Fe2O30.50％；CaO 0.28％；MgO 24.35％；K2O 0.17％；Na20.20 percent of O; the loss on ignition is 4.91%.
6. The temperature-regulating slurry for reducing the firing temperature of the spot brick as claimed in claim 2, wherein the chemical composition of the sodium hudroxide sand comprises, in mass percent:
SiO274.34％；Al2O314.37％；Fe2O30.17％；CaO 0.85％；MgO 0.40％；K2O 0.27％；Na2O8.41 percent; the loss on ignition is 1.19%.
7. The temperature control slurry for reducing a firing temperature of a checker brick as claimed in claim 2,
the temperature adjusting slurry is processed by a ball milling process;
the glaze slurry fineness of the temperature-adjusting slurry is calculated by a 325-mesh sieve, and the screen residue is 1.0-1.4%;
the viscosity of the temperature adjusting slurry is 40-100 seconds;
the specific gravity of the temperature-adjusting pulp is not less than 1.67;
the moisture content in the temperature-adjusting pulp is 39% -41%.
8. The temperature control slurry for reducing the firing temperature of a checker brick according to any one of claims 1 to 7, wherein the amount of the temperature control slurry added is 0.09 to 1.0% by mass.
9. A method for producing a checker brick, characterized in that it comprises a step of adding a temperature-adjusting slurry for lowering the baking temperature of a checker brick as claimed in any one of claims 1 to 8.
10. A speckle brick, which comprises a temperature-control paste as claimed in any one of claims 1 to 8 for reducing the firing temperature of the speckle brick.
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