CN112759349B - Aluminum silicon carbide grouting material - Google Patents
Aluminum silicon carbide grouting material Download PDFInfo
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- CN112759349B CN112759349B CN202110109957.XA CN202110109957A CN112759349B CN 112759349 B CN112759349 B CN 112759349B CN 202110109957 A CN202110109957 A CN 202110109957A CN 112759349 B CN112759349 B CN 112759349B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/0263—Hardening promoted by a rise in temperature
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
Abstract
The invention relates to an aluminum silicon carbide grouting material which is prepared from the following components in parts by weight: 500 portions of 200-mesh bauxite 300-; the invention has the advantages of capability of improving the compressive strength and the tensile strength after curing, short pouring and curing time, micro-expansion, long service life and simple process.
Description
Technical Field
The invention belongs to the technical field of grouting materials, and particularly relates to an aluminum silicon carbide grouting material.
Background
The aluminum silicon carbide (AlSiC) is a particle reinforced metal matrix composite, adopts aluminum alloy as a matrix, takes SiC particles as a reinforcement in a certain form, proportion and distribution state according to design requirements, forms a multi-group phase composite with an obvious interface, and has comprehensive superior performance which is not possessed by single metal; the grouting material is selected for achieving the determined engineering purpose, can exist in a liquid state, is convenient to inject into internal spaces such as cracks, fissures and pores of corresponding media by utilizing a hydraulic pressure, air pressure or electrochemical principle, and has a cementing and curing capacity, so that a leakage channel of the media is blocked, and physical properties and mechanical properties are improved; therefore, it is necessary to provide an aluminum silicon carbide grouting material which can improve the compressive strength and the tensile strength after curing, has short pouring and curing time, micro-expansion, long service life and simple process.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the aluminum silicon carbide grouting material which can improve the compressive strength and the tensile strength after curing, has short pouring and curing time, micro-expansion, long service life and simple process.
The technical scheme of the invention is as follows: the aluminum silicon carbide grouting material is prepared from the following components in parts by weight: 500 portions of 200-mesh bauxite 300-.
The mass percentage of the alumina in the bauxite is more than or equal to 90 percent.
The mass percentage of the main component SiC in the silicon carbide is more than or equal to 90 percent.
The main component SiO in Guangxi white mud2More than or equal to 50 percent of Al2O3More than or equal to 30 percent of mass percent and Fe2O3Mass percentage content is more than or equal to 2 percent, K2O and Na2The sum of the two contents of O in percentage by mass<1%。
The preparation method of the aluminum silicon carbide grouting material comprises the following steps:
step 1): weighing raw materials of bauxite, silicon carbide, Guangxi white mud, cellulose and water glass according to a predetermined weight ratio for later use;
step 2): placing the bauxite, the silicon carbide and the Guangxi white mud which are prepared according to the predetermined weight ratio in the step 1) into a cone-shaped stirrer at normal temperature and normal pressure, and stirring for 20-30 minutes to obtain a stirring mixture A for later use;
step 3): fully and uniformly stirring the cellulose, the water glass and the stirring mixture A prepared in the step 1) according to the preset weight ratio in a cone-shaped stirrer at the stirring temperature of 140-150 ℃ for 30-40 minutes to obtain a stirring mixture B;
step 4): cooling and drying the stirred mixture B obtained in the step 3), crushing and sieving by a 200-mesh sieve, collecting sieved particles to obtain a finished grouting material product, taking out, bagging and storing in a damp-proof manner.
The invention has the following advantages: when the invention is used, water is added according to the water consumption required by use, mechanical mixing is preferably adopted, 2/3 water is preferably added and mixed for about 3min when mixing is carried out, then the rest water is added and mixed until the mixing position is uniform, the mixing position is close to a grouting position, the daily average uniform temperature is not less than 5 ℃ when grouting is carried out, a maintenance agent or a plastic film is sprayed on an exposed part after grouting is finished, a wet grass bag is covered to keep moist, when the plastic film is used for covering, the exposed surface of grouting material is tightly covered, condensed water is kept in the plastic film, when watering is not convenient on the surface of the grouting material, the maintenance agent can be sprayed, in winter construction, when engineering has no special requirement on strength increase, the exposed part is covered with the plastic film and is covered with a heat-insulating material in time after grouting is finished, the initial maintenance temperature is not less than 5 ℃, watering is not required when maintenance is carried out under the negative temperature condition, and when the difference between the surface temperature of the grouting material and the environmental temperature is more than 20 ℃ after demolding, the heat-insulating material is adopted for covering and curing, and if the environmental temperature is lower than the minimum construction temperature required by the grouting material or the strength increase needs to be accelerated, a manual heating curing mode can be adopted; the invention has the advantages of capability of improving the compressive strength and the tensile strength after curing, short pouring and curing time, micro-expansion, long service life and simple process.
Drawings
FIG. 1 is a schematic diagram of performance indexes of the aluminum silicon carbide grouting material of the invention
FIG. 2 is a schematic diagram of the thermal conductivity of the aluminum silicon carbide grouting material of the invention.
FIG. 3 is a schematic diagram of the thermal expansion coefficient of the aluminum silicon carbide grouting material of the invention.
FIG. 4 is a schematic view of the bending strength of the aluminum silicon carbide grouting material of the invention.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The aluminum silicon carbide grouting material is prepared from the following components in parts by weight: 300 parts of 200-mesh bauxite, 400 parts of 200-mesh silicon carbide, 140 parts of 200-mesh Guangxi white mud, 1.5 parts of cellulose and 110 parts of water glass.
The preparation method of the aluminum silicon carbide grouting material comprises the following steps:
step 1): weighing raw materials of bauxite, silicon carbide, Guangxi white mud, cellulose and water glass according to a predetermined weight ratio for later use;
step 2): placing the bauxite, the silicon carbide and the Guangxi white mud which are prepared according to the predetermined weight ratio in the step 1) into a cone-shaped stirrer at normal temperature and normal pressure, and stirring for 20-30 minutes to obtain a stirring mixture A for later use;
step 3): fully and uniformly stirring the cellulose, the water glass and the stirring mixture A prepared in the step 1) according to the preset weight ratio in a cone-shaped stirrer at the stirring temperature of 140-150 ℃ for 30-40 minutes to obtain a stirring mixture B;
step 4): cooling and drying the stirred mixture B obtained in the step 3), crushing and sieving by a 200-mesh sieve, collecting sieved particles to obtain a finished grouting material product, taking out, bagging and storing in a damp-proof manner.
The embodiment is a universal grouting material, which is suitable for foundation bolt anchoring, steel bar cutting and embedding and foundation secondary grouting with a grouting layer thickness of 30mm, when the universal grouting material is used, water is added according to the water consumption required by use, mechanical stirring is preferably adopted, 2/3 water is preferably added during stirring, stirring is carried out for about 3min, then the residual water is added, stirring is carried out until the stirring is uniform, the stirring position is close to the grouting position, the daily average temperature is not lower than 5 ℃ during grouting, a curing agent or a plastic film is sprayed on the exposed part after grouting is finished, a wet grass bag is covered to keep moist, when the plastic film is covered, the exposed surface of the grouting material is tightly covered, condensed water is kept in the plastic film, when the surface of the grouting material is not convenient to be watered, the curing agent can be sprayed, construction in winter is carried out, when no special requirement on the strength increase exists in engineering, the exposed part is covered with the plastic film and a heat preservation material is covered on the exposed part after grouting is finished, the initial curing temperature is not lower than 5 ℃, watering is not needed during curing under the negative temperature condition, when the difference between the surface temperature of the grouting material after the form removal and the environmental temperature is more than 20 ℃, heat-insulating materials are adopted for covering and curing, and if the environmental temperature is lower than the minimum construction temperature required by the grouting material or the strength increase needs to be accelerated, a manual heating curing mode can be adopted; the invention has the advantages of capability of improving the compressive strength and the tensile strength after curing, short pouring and curing time, micro-expansion, long service life and simple process.
Example 2
The aluminum silicon carbide grouting material is prepared from the following components in parts by weight: 300 parts of bauxite of 200 meshes, 500 parts of silicon carbide of 200 meshes, 145 parts of Guangxi white mud of 200 meshes, 2 parts of cellulose and 125 parts of water glass.
The preparation method of the aluminum silicon carbide grouting material comprises the following steps:
step 1): weighing raw materials of bauxite, silicon carbide, Guangxi white mud, cellulose and water glass according to a predetermined weight ratio for later use;
step 2): placing the bauxite, the silicon carbide and the Guangxi white mud which are prepared according to the predetermined weight ratio in the step 1) into a cone-shaped stirrer at normal temperature and normal pressure, and stirring for 20-30 minutes to obtain a stirring mixture A for later use;
step 3): fully and uniformly stirring the cellulose, the water glass and the stirring mixture A prepared in the step 1) according to the preset weight ratio in a cone-shaped stirrer at the stirring temperature of 140-150 ℃ for 30-40 minutes to obtain a stirring mixture B;
step 4): cooling and drying the stirred mixture B obtained in the step 3), crushing and sieving by a 200-mesh sieve, collecting sieved particles to obtain a finished grouting material product, taking out, bagging and storing in a damp-proof manner.
The embodiment is a reinforced grouting material, which is suitable for secondary grouting of equipment foundation with grouting layer thickness more than or equal to 150mm, and secondary grouting of equipment foundation with oil-resistant requirement for reinforcing and reinforcing (repairing thickness more than or equal to 40 mm) beams, plates, columns, foundations and terraces of buildings, the invention is used, water is added according to the water consumption required by use, mechanical mixing is adopted, 2/3 water is added firstly when mixing is adopted, mixing is carried out for about 3min, then residual water is added, mixing is carried out until the mixing is uniform, the mixing place is close to the grouting place, the daily average uniform temperature is not lower than 5 ℃ when grouting is carried out, a maintenance agent or a covering plastic film is sprayed on the exposed part after grouting is finished, a wet grass bag is covered to keep moist, when the covering by the plastic film is adopted, the exposed surface of the grouting material is covered tightly, condensed water is kept in the plastic film, when the surface of the grouting material is not easy to water spraying, in winter construction, when the engineering has no special requirement on strength increase, the exposed part should be covered with a plastic film and covered with a heat-insulating material in time after grouting is finished, the initial curing temperature should not be lower than 5 ℃, watering is not required during curing under the negative temperature condition, when the difference between the surface temperature of the grouting material after demolding and the environmental temperature is more than 20 ℃, the heat-insulating material should be used for covering and curing, and if the environmental temperature is lower than the lowest construction temperature required by the grouting material or the strength increase needs to be accelerated, a manual heating curing mode can be adopted; the invention has the advantages of capability of improving the compressive strength and the tensile strength after curing, short pouring and curing time, micro-expansion, long service life and simple process.
Example 3
The aluminum silicon carbide grouting material is prepared from the following components in parts by weight: 400 parts of 200-mesh bauxite, 450 parts of 200-mesh silicon carbide, 148 parts of 200-mesh Guangxi white mud, 2 parts of cellulose and 120 parts of water glass.
The preparation method of the aluminum silicon carbide grouting material comprises the following steps:
step 1): weighing raw materials of bauxite, silicon carbide, Guangxi white mud, cellulose and water glass according to a predetermined weight ratio for later use;
step 2): placing the bauxite, the silicon carbide and the Guangxi white mud which are prepared according to the predetermined weight ratio in the step 1) into a cone-shaped stirrer at normal temperature and normal pressure, and stirring for 20-30 minutes to obtain a stirring mixture A for later use;
step 3): fully and uniformly stirring the cellulose, the water glass and the stirring mixture A prepared in the step 1) according to the preset weight ratio in a cone-shaped stirrer at the stirring temperature of 140-150 ℃ for 30-40 minutes to obtain a stirring mixture B;
step 4): cooling and drying the stirred mixture B obtained in the step 3), crushing and sieving by a 200-mesh sieve, collecting sieved particles to obtain a finished grouting material product, taking out, bagging and storing in a damp-proof manner.
The super-flow grouting material has the characteristics of high flow state and micro-expansion, the strength can reach more than 20Pma in one hour, the super-flow grouting material is suitable for secondary grouting of equipment foundations with small gaps, and parts with high material fluidity requirements, when the super-flow grouting material is used, water is added according to the water consumption required by use, mechanical mixing is preferably adopted, 2/3 water is preferably added during mixing for about 3min, then the residual water is added for mixing until the mixing is uniform, the mixing position is preferably close to a grouting position, the daily average uniform temperature is not lower than 5 ℃ during grouting, a curing agent or a covering plastic film is sprayed on exposed parts after grouting is finished, a wet grass bag is covered to keep wet, when the covering of the plastic film is adopted, the exposed surface of the grouting material is covered tightly, the condensed water is kept in the plastic film, when the surface of the grouting material is not easy to water, the curing agent can be sprayed, and construction in winter can be carried out, when the engineering has no special requirement on strength increase, the exposed part is covered with a plastic film and covered with a heat insulation material in time after grouting is finished, the initial curing temperature is not lower than 5 ℃, watering is not required during curing under the negative temperature condition, when the difference between the surface temperature of the grouting material and the environmental temperature after the formwork is removed is more than 20 ℃, the heat insulation material is adopted for covering and curing, and if the environmental temperature is lower than the minimum construction temperature required by the grouting material or the strength increase needs to be accelerated, a manual heating curing mode can be adopted; the invention has the advantages of capability of improving the compressive strength and the tensile strength after curing, short pouring and curing time, micro-expansion, long service life and simple process.
Example 4
The aluminum silicon carbide grouting material is prepared from the following components in parts by weight: 500 parts of 200-mesh bauxite, 500 parts of 200-mesh silicon carbide, 150 parts of 200-mesh Guangxi white mud, 2.5 parts of cellulose and 120 parts of water glass.
The preparation method of the aluminum silicon carbide grouting material comprises the following steps:
step 1): weighing raw materials of bauxite, silicon carbide, Guangxi white mud, cellulose and water glass according to a predetermined weight ratio for later use;
step 2): placing the bauxite, the silicon carbide and the Guangxi white mud which are prepared according to the predetermined weight ratio in the step 1) into a cone-shaped stirrer at normal temperature and normal pressure, and stirring for 20-30 minutes to obtain a stirring mixture A for later use;
step 3): fully and uniformly stirring the cellulose, the water glass and the stirring mixture A prepared in the step 1) according to the preset weight ratio in a cone-shaped stirrer at the stirring temperature of 140-150 ℃ for 30-40 minutes to obtain a stirring mixture B;
step 4): cooling and drying the stirred mixture B obtained in the step 3), crushing and sieving by a 200-mesh sieve, collecting sieved particles to obtain a finished grouting material product, taking out, bagging and storing in a damp-proof manner.
The super early strength grouting material has the characteristics of super early strength and micro expansion, the strength can reach more than 20Pma in one hour, and the super early strength grouting material is suitable for rapid first-aid repair of railway sleepers; fast repairing of concrete pavements such as airports, expressways and the like; rapidly anchoring the foundation bolt; the invention is used in rush repair of buildings and structures, adding water according to the water consumption required by use, preferably mechanically stirring, adding 2/3 water first when stirring for about 3min, then adding the rest water to stir until uniform, the stirring place is close to the grouting place, the average daily uniform temperature is not lower than 5 ℃ when grouting, spraying curing agent or covering plastic film on the exposed part after grouting, covering with wet grass bag to keep wet, covering with plastic film tightly, keeping the exposed surface of grouting material with condensed water, spraying curing agent when the surface of grouting material is not easy to water, constructing in winter, when the engineering has no special requirement for strength increase, covering with plastic film and covering with heat-insulating material, starting curing temperature is not lower than 5 ℃, not watering when curing under negative temperature condition, when the difference between the surface temperature of the grouting material after the form removal and the environmental temperature is more than 20 ℃, a thermal insulation material is adopted for covering and curing, and if the environmental temperature is lower than the minimum construction temperature required by the grouting material or the strength increase needs to be accelerated, a manual heating curing mode can be adopted; the invention has the advantages of capability of improving the compressive strength and the tensile strength after curing, short pouring and curing time, micro-expansion, long service life and simple process.
As shown in fig. 1-4: to further illustrate the performance of the present invention, specific effect data is provided below.
1. Relevant Performance index data for the grouting Material of the invention
The performance indexes of the grouting material related to the industry standards of the people's republic of China, namely, the technical Specification for application of cement-based grouting materials (GB/T50448-2015) and the technical Specification for application of cement-based grouting materials (Q/LYS 159-2000) mainly comprise heat conductivity, specific heat, linear thermal expansion coefficient, shear modulus, bending strength, tensile strength, elongation at break, fracture toughness, air tightness and the like.
According to the formula of the grouting material disclosed by the invention in the specification, test pieces are manufactured according to the specification requirements, and then performance indexes such as thermal conductivity, specific heat, linear thermal expansion coefficient, shear modulus, bending strength, tensile strength, elongation at break, fracture toughness and air tightness are detected, wherein the detection results of the indexes such as thermal conductivity, specific heat, linear thermal expansion coefficient, shear modulus, bending strength, tensile strength, elongation at break, fracture toughness and air tightness are shown in figure 1.
2. Regarding thermal conductivity, thermal expansion coefficient and bending strength
(1) Thermal conductivity is shown in FIG. 2
As can be seen from fig. 2, the temperature has little effect on the aluminum silicon carbide grout, but generally shows a tendency of gradually decreasing thermal conductivity with increasing temperature, and when the temperature is the same, the thermal conductivity of the aluminum silicon carbide grout decreases with increasing volume factor.
(2) The thermal expansion coefficient is shown in FIG. 3
It can be seen from fig. 3 that the thermal expansion coefficient of the aluminum silicon carbide grouting material increases with the increase of the temperature and decreases with the increase of the volume fraction of the SiC particles at the same temperature, for the aluminum silicon carbide grouting material, the thermal expansion coefficient mainly depends on the thermal expansion coefficient of the matrix and the degree of restriction of the reinforcement on the matrix through the matrix-reinforcement interface, and as the temperature increases, the load transfer capability of the reinforcement-matrix interface in the aluminum silicon carbide grouting material decreases, the restriction capability of the reinforcement on the expansion of the matrix decreases, and the thermal expansion coefficient of the composite material also increases with the temperature increase.
(3) Bending strength is shown in FIG. 4
It can be seen from fig. 4 that the bending strength of the aluminum silicon carbide grouting material decreases with the increase of the volume fraction of the ALSiC, the brittleness of the aluminum silicon carbide grouting material increases, the matrix lacks sufficient plasticity to propagate high local stress, so that the composite material fractures before reaching normal strength, and the aluminum silicon carbide grouting material with a higher ALSiC volume fraction has the characteristic of brittle fracture as a whole, but a small amount of tearing edges and dimples exist in the fracture, so that the aluminum silicon carbide grouting material has the characteristic of certain plastic deformation, and the characteristic of brittle fracture is more obvious when the volume phase fraction is higher.
Claims (4)
1. Aluminium carborundum matter grout material, its characterized in that: the composition is prepared from the following components in parts by weight: 500 portions of 200-mesh bauxite 300-;
the preparation method of the aluminum silicon carbide grouting material comprises the following steps:
step 1): weighing raw materials of bauxite, silicon carbide, Guangxi white mud, cellulose and water glass according to a predetermined weight ratio for later use;
step 2): placing the bauxite, the silicon carbide and the Guangxi white mud which are prepared according to the predetermined weight ratio in the step 1) into a cone-shaped stirrer at normal temperature and normal pressure, and stirring for 20-30 minutes to obtain a stirring mixture A for later use;
step 3): fully and uniformly stirring the cellulose, the water glass and the stirring mixture A prepared in the step 1) according to the preset weight ratio in a cone-shaped stirrer at the stirring temperature of 140-150 ℃ for 30-40 minutes to obtain a stirring mixture B;
step 4): and (3) cooling and drying the stirred mixture B obtained in the step 3), crushing and sieving by a 200-mesh sieve, collecting sieved particles to obtain a finished grouting material product, taking out, bagging and storing in a damp-proof manner.
2. The aluminum silicon carbide grouting material of claim 1, wherein: the mass percentage of the alumina in the bauxite is more than or equal to 90 percent.
3. The aluminum silicon carbide grouting material of claim 1, wherein: the mass percentage of the main component SiC in the silicon carbide is more than or equal to 90 percent.
4. The aluminum silicon carbide grouting material of claim 1, wherein: the main component SiO in Guangxi white mud2More than or equal to 50 percent of Al2O3More than or equal to 30 percent of mass percent and Fe2O3The mass percentage content is not less than2%，K2O and Na2The sum of the two contents of O in percentage by mass<1%。
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| JP2869843B2 (en) * | 1993-10-20 | 1999-03-10 | 強化土エンジニヤリング株式会社 | Chemical for ground injection |
| CN1130431C (en) * | 1999-10-19 | 2003-12-10 | 上海梅山(集团)有限公司 | Refractory inorganic paint and its preparing process |
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| CN104291840A (en) * | 2014-09-19 | 2015-01-21 | 长兴正豪耐火材料有限公司 | High-strength aluminum-magnesium castable for nickel iron ladle |
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Address after: 451200 Yinhe Road, naicai Park, Beishankou Town, Gongyi City, Zhengzhou City, Henan Province Applicant after: Henan Hongyu New Material Technology Co.,Ltd. Address before: 451200 Yinhe Road, naicai Park, Beishankou Town, Gongyi City, Zhengzhou City, Henan Province Applicant before: GONGYI CITY HONGYU REFRACTORIES Co.,Ltd. |
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