CN113443869A - Asbestos cement and its production process - Google Patents
Asbestos cement and its production process Download PDFInfo
- Publication number
- CN113443869A CN113443869A CN202110357966.0A CN202110357966A CN113443869A CN 113443869 A CN113443869 A CN 113443869A CN 202110357966 A CN202110357966 A CN 202110357966A CN 113443869 A CN113443869 A CN 113443869A
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- asbestos
- cement
- stirring
- wool
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- 239000010425 asbestos Substances 0.000 title claims abstract description 152
- 229910052895 riebeckite Inorganic materials 0.000 title claims abstract description 152
- 239000004568 cement Substances 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 210000002268 wool Anatomy 0.000 claims abstract description 96
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000003756 stirring Methods 0.000 claims abstract description 73
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000004576 sand Substances 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000011398 Portland cement Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 208000005156 Dehydration Diseases 0.000 claims description 22
- 230000018044 dehydration Effects 0.000 claims description 22
- 238000006297 dehydration reaction Methods 0.000 claims description 22
- 238000001035 drying Methods 0.000 claims description 14
- 239000003469 silicate cement Substances 0.000 claims description 6
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 9
- 239000000428 dust Substances 0.000 abstract description 6
- 239000012535 impurity Substances 0.000 abstract description 4
- 230000002401 inhibitory effect Effects 0.000 abstract description 4
- 238000007872 degassing Methods 0.000 abstract 1
- 210000004209 hair Anatomy 0.000 abstract 1
- 239000003643 water by type Substances 0.000 abstract 1
- 238000002791 soaking Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses asbestos cement, which consists of the following raw materials in parts by weight: 30-40 parts of asbestos wool, 110 parts of Portland cement, 1200 parts of clear water, 1300 parts of defoaming agent, 0.3-0.8 part of river sand aggregate and 15-25 parts of sand aggregate; the invention firstly adds the defoaming agent and other auxiliary materials, mixes the defoaming agent and the asbestos wool with the interior of the container, enables the asbestos wool to be fully loosened and completely soaked, plays roles of inhibiting and breaking the bubbles through the defoaming agent, and is convenient for the smooth of the subsequent stirring and mixing process, 1200 parts of clean water with the water temperature of 20-30 ℃ are divided into three parts, the proportion is respectively 590 parts: 590 parts by weight: 20 parts, make asbestos fine hair accomplish earlier through two 590 clear waters and soak, the degasification, filter harmful dust and impurity again, adopt and divide into 1200 parts clear water triplets, and the triplets clear water is stored by three different stirred vessel, can change the container and sieve the remaining residue of preceding stirring mixing process and harmful substance, avoid it to continue to remain in fashioned asbestos cement.
Description
Technical Field
The invention relates to the technical field of cement production, in particular to asbestos cement and a production process thereof.
Background
Asbestos cement is prepared by mixing asbestos wool in the cement processing process, and the asbestos cement product becomes one of the materials commonly used in the building industry through the good tensile strength, good heat insulation and corrosion resistance of asbestos;
however, the existing asbestos cement is prepared by taking cement as a main raw material, adding asbestos wool, clear water and other raw materials, and carrying out processes such as stirring, dehydration, drying and the like, because the manufacturing cost is higher, the asbestos cement is mostly used for high-grade facilities such as hotels, villas and the like and buildings, but the existing asbestos cement production process is to separately soak and stir the asbestos wool to ensure that other materials are mixed and stirred with the asbestos wool after the asbestos wool is diffused, but a large amount of bubbles are generated in the stirring process of the asbestos wool to influence the stirring effect of the asbestos wool; secondly, when the existing asbestos cement is produced, a large amount of harmful dust contained in asbestos cannot be removed, and further the health of people can be influenced in the production and use processes of the asbestos cement; secondly, only one stirring container is usually used in the production of the prior asbestos cement, so that a large amount of residues and harmful substances cannot be treated in time, and an effective filtering process is lacked.
Disclosure of Invention
The invention aims to provide asbestos cement, which solves the problems that the existing asbestos cement takes cement as a main raw material, asbestos wool, clear water and other raw materials are added, and the asbestos cement is prepared by processes of stirring, dewatering, drying and the like, because the manufacturing cost is higher, the asbestos cement is mostly used for high-grade facilities such as hotels, villas and the like and buildings, but the existing asbestos cement production process is to separately soak and stir the asbestos wool firstly, so that the asbestos cement is diffused and then mix and stir other materials and the asbestos wool, but a large amount of bubbles are generated in the asbestos wool stirring process to influence the stirring effect of the asbestos wool; secondly, when the existing asbestos cement is produced, a large amount of harmful dust contained in asbestos cannot be removed, and further the health of people can be influenced in the production and use processes of the asbestos cement; secondly, only one stirring container is usually used in the production of the prior asbestos cement, so that a large amount of residues and harmful substances cannot be treated in time, and the technical problem of lack of an effective filtering process is solved; compared with the traditional asbestos cement, the asbestos cement is added with the defoaming agent and other auxiliary materials, the defoaming agent and the asbestos wool are mixed with the inside of the container, so that the asbestos wool can be fully loosened and completely soaked, and the defoaming agent is used for inhibiting and breaking the bubbles, thereby facilitating the smoothness of the subsequent stirring and mixing process; 1200 parts of clean water with the water temperature of 20-30 ℃ are divided into three parts, the proportion is respectively 590 parts: 590 parts by weight: 20 parts, placing 30 parts of asbestos wool into 590 parts of clean water for stirring, wherein the stirring time is 20-25min, taking out the asbestos wool after soaking, stirring the asbestos wool and 590 parts of clean water for 10-15min, performing high-temperature dehydration treatment on the stirred asbestos wool through a dehydration box, wherein the temperature of the dehydration box is 250-300 ℃, the drying time is 5-10min, soaking the asbestos wool through 590 parts of clean water, removing bubbles, and filtering harmful dust and impurities, so that the harmfulness of the asbestos wool is greatly reduced, and the health of a producer and a user is protected; 1200 parts of clean water is divided into three parts, the three parts of clean water are stored by three different stirring containers, firstly, 30 parts of asbestos wool and 590 parts of clean water are started in a first container, then, 0.3 part of defoaming agent is added 10-15min after the stirring of 30 parts of asbestos wool and 590 parts of clean water is started, then, the soaked asbestos wool is added into a second container for stirring, the stirred asbestos wool is dehydrated and then is added into a third container, 30 parts of asbestos wool is added into 20 parts of clean water, and simultaneously, 100 parts of silicate cement and 15 parts of river sand aggregate are poured for mixing and stirring to be fully stirred and mixed into paste, so that residues and harmful substances remained in the previous stirring and mixing process can be screened, and the residues and the harmful substances are prevented from remaining in the formed asbestos cement.
The purpose of the invention can be realized by the following technical scheme:
the asbestos cement is prepared from the following raw materials in parts by weight: 30-40 parts of asbestos wool, 110 parts of Portland cement, 1200 parts of clear water, 1300 parts of defoaming agent, 0.3-0.8 part of river sand aggregate and 15-25 parts of sand aggregate;
preferably, the asbestos cement comprises the following components in parts by weight: : 30 parts of asbestos wool, 100 parts of Portland cement, 1200 parts of clear water, 0.3 part of defoaming agent and 15 parts of river sand aggregate;
the production process of asbestos cement includes the following steps:
the method comprises the following steps: dividing 1200 parts of clear water into three parts, wherein the proportion is respectively 590 parts: 590 parts by weight: 20 parts of (1);
step two: putting 30 parts of asbestos wool into 590 parts of clear water for stirring;
step three: pouring 0.3 part of defoaming agent into 590 parts of clear water and continuously stirring with 30 parts of asbestos wool;
step four: 30 parts of asbestos wool which is stirred is put into 590 parts of clean water for stirring, and 0.3 part of defoaming agent is diluted;
step five: dehydrating 30 parts of asbestos wool which is subjected to secondary stirring;
step six: putting 30 parts of dehydrated asbestos wool into 20 parts of clear water, and simultaneously pouring 100 parts of Portland cement and 15 parts of river sand aggregate for mixing and stirring to fully stir and mix the materials into paste;
step seven: placing the prepared material prepared in the sixth step into a mould, and then adding the mould into an oven for dehydration treatment to obtain asbestos cement;
step eight: and standing and cooling the baked asbestos cement for use.
Further, in the first step, three parts of clear water are stored in three different stirring containers, and the water temperature is 20-30 ℃.
Further, in the second step, the stirring time of 30 parts of asbestos wool and 590 parts of clean water is 20-25min, the time for adding 0.3 part of defoaming agent in the third step is 10-15min after the stirring of 30 parts of asbestos wool and 590 parts of clean water is started, the stirring time of 30 parts of asbestos wool and 590 parts of clean water in the fifth step is 10-15min, and the stirring time of 30 parts of asbestos wool, 20 parts of clean water, 100 parts of silicate cement and 15 parts of river sand aggregate in the sixth step is 40-45 min.
Further, in the fifth step, 30 parts of asbestos wool is subjected to high-temperature dehydration treatment through a dehydration box, the temperature of the dehydration box is 250-300 ℃, the drying time is 5-10min, and in the seventh step, the temperature of the drying box is 400-450 ℃. The drying time is 30-35 min.
Further, the main material of the defoaming agent is polyether organic silicon, river sand aggregate is fine aggregate, the particle size of the defoaming agent is 0.15-4.75 mm, the strength of portland cement is 42.5 grade, and the grade of asbestos wool is 5 grade asbestos wool.
The invention has the beneficial effects that:
1. compared with the traditional asbestos cement, the asbestos cement is added with the defoaming agent and other auxiliary materials, the defoaming agent and the asbestos wool are mixed with the inside of the container, so that the asbestos wool can be fully loosened and completely soaked, and the defoaming agent is used for inhibiting and breaking the bubbles, thereby facilitating the smoothness of the subsequent stirring and mixing process;
2. 1200 parts of clean water with the water temperature of 20-30 ℃ are divided into three parts, the proportion is respectively 590 parts: 590 parts by weight: 20 parts, placing 30 parts of asbestos wool into 590 parts of clean water for stirring, wherein the stirring time is 20-25min, taking out the asbestos wool after soaking, stirring the asbestos wool and 590 parts of clean water for 10-15min, performing high-temperature dehydration treatment on the stirred asbestos wool through a dehydration box, wherein the temperature of the dehydration box is 250-300 ℃, the drying time is 5-10min, soaking the asbestos wool through 590 parts of clean water, removing bubbles, and filtering harmful dust and impurities, so that the harmfulness of the asbestos wool is greatly reduced, and the health of a producer and a user is protected;
3. 1200 parts of clean water is divided into three parts, the three parts of clean water are stored by three different stirring containers, firstly, 30 parts of asbestos wool and 590 parts of clean water are started in a first container, then, 0.3 part of defoaming agent is added 10-15min after the stirring of 30 parts of asbestos wool and 590 parts of clean water is started, then, the soaked asbestos wool is added into a second container for stirring, the stirred asbestos wool is dehydrated and then is added into a third container, 30 parts of asbestos wool is added into 20 parts of clean water, and simultaneously, 100 parts of silicate cement and 15 parts of river sand aggregate are poured for mixing and stirring to be fully stirred and mixed into paste, so that residues and harmful substances remained in the previous stirring and mixing process can be screened, and the residues and the harmful substances are prevented from remaining in the formed asbestos cement.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The asbestos cement is prepared from the following raw materials in parts by weight: 30-40 parts of asbestos wool, 110 parts of Portland cement, 1200 parts of clear water, 1300 parts of defoaming agent, 0.3-0.8 part of river sand aggregate and 15-25 parts of sand aggregate;
the asbestos cement comprises the following components in parts by weight: 30 parts of asbestos wool, 100 parts of Portland cement, 1200 parts of clear water, 0.3 part of defoaming agent and 15 parts of river sand aggregate;
the production process of asbestos cement includes the following steps:
the method comprises the following steps: dividing 1200 parts of clear water into three parts, wherein the proportion is respectively 590 parts: 590 parts by weight: 20 parts of (1);
step two: putting 30 parts of asbestos wool into 590 parts of clear water for stirring;
step three: pouring 0.3 part of defoaming agent into 590 parts of clear water and continuously stirring with 30 parts of asbestos wool;
step four: 30 parts of asbestos wool which is stirred is put into 590 parts of clean water for stirring, and 0.3 part of defoaming agent is diluted;
step five: dehydrating 30 parts of asbestos wool which is subjected to secondary stirring;
step six: putting 30 parts of dehydrated asbestos wool into 20 parts of clear water, and simultaneously pouring 100 parts of Portland cement and 15 parts of river sand aggregate for mixing and stirring to fully stir and mix the materials into paste;
step seven: placing the prepared material prepared in the sixth step into a mould, and then adding the mould into an oven for dehydration treatment to obtain asbestos cement;
step eight: and standing and cooling the baked asbestos cement for use.
In the first step, three portions of clear water are stored in three different stirring containers, and the water temperature is 20-30 ℃.
In the second step, the stirring time of 30 parts of asbestos wool and 590 parts of clean water is 20-25min, the time for adding 0.3 part of defoaming agent in the third step is 10-15min after the stirring of 30 parts of asbestos wool and 590 parts of clean water is started, the stirring time of 30 parts of asbestos wool and 590 parts of clean water in the fifth step is 10-15min, and the stirring time of 30 parts of asbestos wool, 20 parts of clean water, 100 parts of silicate cement and 15 parts of river sand aggregate in the sixth step is 40-45 min.
In the fifth step, 30 parts of asbestos wool is subjected to high-temperature dehydration treatment by a dehydration box, the temperature of the dehydration box is 250-300 ℃, the drying time is 5-10min, and in the seventh step, the temperature of the drying box is 400-450 ℃. The drying time is 30-35 min.
The main material of the defoaming agent is polyether organic silicon, river sand aggregate is fine aggregate, the particle size of the defoaming agent is 0.15-4.75 mm, the strength of Portland cement is 42.5 grade, and the grade of asbestos wool is 5 grade asbestos wool.
Compared with the traditional asbestos cement, the asbestos cement is added with the defoaming agent and other auxiliary materials, the defoaming agent and the asbestos wool are mixed with the inside of the container, so that the asbestos wool can be fully loosened and completely soaked, and the defoaming agent is used for inhibiting and breaking the bubbles, thereby facilitating the smoothness of the subsequent stirring and mixing process; 1200 parts of clean water with the water temperature of 20-30 ℃ are divided into three parts, the proportion is respectively 590 parts: 590 parts by weight: 20 parts, placing 30 parts of asbestos wool into 590 parts of clean water for stirring, wherein the stirring time is 20-25min, taking out the asbestos wool after soaking, stirring the asbestos wool and 590 parts of clean water for 10-15min, performing high-temperature dehydration treatment on the stirred asbestos wool through a dehydration box, wherein the temperature of the dehydration box is 250-300 ℃, the drying time is 5-10min, soaking the asbestos wool through 590 parts of clean water, removing bubbles, and filtering harmful dust and impurities, so that the harmfulness of the asbestos wool is greatly reduced, and the health of a producer and a user is protected; 1200 parts of clean water is divided into three parts, the three parts of clean water are stored by three different stirring containers, firstly, 30 parts of asbestos wool and 590 parts of clean water are started in a first container, then, 0.3 part of defoaming agent is added 10-15min after the stirring of 30 parts of asbestos wool and 590 parts of clean water is started, then, the soaked asbestos wool is added into a second container for stirring, the stirred asbestos wool is dehydrated and then is added into a third container, 30 parts of asbestos wool is added into 20 parts of clean water, and simultaneously, 100 parts of silicate cement and 15 parts of river sand aggregate are poured for mixing and stirring to be fully stirred and mixed into paste, so that residues and harmful substances remained in the previous stirring and mixing process can be screened, and the residues and the harmful substances are prevented from remaining in the formed asbestos cement.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (7)
1. An asbestos cement, characterized in that: the asbestos cement comprises the following raw materials in parts by weight: 30-40 parts of asbestos wool, 110 parts of Portland cement, 1200 parts of clear water, 1300 parts of defoaming agent, 0.3-0.8 part of river sand aggregate and 15-25 parts of sand aggregate.
2. The asbestos cement according to claim 1, wherein the asbestos cement comprises the following components in parts by weight: 30 parts of asbestos wool, 100 parts of Portland cement, 1200 parts of clear water, 0.3 part of defoaming agent and 15 parts of river sand aggregate.
3. The asbestos cement production process according to claim 1, characterized in that it comprises in particular the following steps:
the method comprises the following steps: dividing 1200 parts of clear water into three parts, wherein the proportion is respectively 590 parts: 590 parts by weight: 20 parts of (1);
step two: putting 30 parts of asbestos wool into 590 parts of clear water for stirring;
step three: pouring 0.3 part of defoaming agent into 590 parts of clear water and continuously stirring with 30 parts of asbestos wool;
step four: 30 parts of asbestos wool which is stirred is put into 590 parts of clean water for stirring, and 0.3 part of defoaming agent is diluted;
step five: dehydrating 30 parts of asbestos wool which is subjected to secondary stirring;
step six: putting 30 parts of dehydrated asbestos wool into 20 parts of clear water, and simultaneously pouring 100 parts of Portland cement and 15 parts of river sand aggregate for mixing and stirring to fully stir and mix the materials into paste;
step seven: placing the prepared material prepared in the sixth step into a mould, and then adding the mould into an oven for dehydration treatment to obtain asbestos cement;
step eight: and standing and cooling the baked asbestos cement for use.
4. A process for the production of asbestos cement according to claim 3, characterized in that: in the first step, three parts of clear water are stored in three different stirring containers, and the water temperature is 20-30 ℃.
5. A process for the production of asbestos cement according to claim 3, characterized in that: in the second step, the stirring time of 30 parts of asbestos wool and 590 parts of clean water is 20-25min, the time for adding 0.3 part of defoaming agent in the third step is 10-15min after the stirring of 30 parts of asbestos wool and 590 parts of clean water is started, the stirring time of 30 parts of asbestos wool and 590 parts of clean water in the fifth step is 10-15min, and the stirring time of 30 parts of asbestos wool, 20 parts of clean water, 100 parts of silicate cement and 15 parts of river sand aggregate in the sixth step is 40-45 min.
6. A process for the production of asbestos cement according to claim 3, characterized in that: in the fifth step, 30 parts of asbestos wool is subjected to high-temperature dehydration treatment by a dehydration box, the temperature of the dehydration box is 250-300 ℃, the drying time is 5-10min, and in the seventh step, the temperature of the drying box is 400-450 ℃. The drying time is 30-35 min.
7. The asbestos cement production process according to claim 1, characterized in that: the main material of the defoaming agent is polyether organic silicon, river sand aggregate is fine aggregate, the particle size of the defoaming agent is 0.15-4.75 mm, the strength of Portland cement is 42.5 grade, and the grade of asbestos wool is 5 grade asbestos wool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110357966.0A CN113443869A (en) | 2021-04-01 | 2021-04-01 | Asbestos cement and its production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110357966.0A CN113443869A (en) | 2021-04-01 | 2021-04-01 | Asbestos cement and its production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113443869A true CN113443869A (en) | 2021-09-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110357966.0A Withdrawn CN113443869A (en) | 2021-04-01 | 2021-04-01 | Asbestos cement and its production process |
Country Status (1)
| Country | Link |
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| CN (1) | CN113443869A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1274665A (en) * | 1968-05-28 | 1972-05-17 | Nat Res Dev | Improvements in and relating to concrete mixes |
| GB1472944A (en) * | 1973-04-04 | 1977-05-11 | Ispra Spa | Opening of asbestos fibres |
| US4190456A (en) * | 1977-07-01 | 1980-02-26 | Ici Australia Limited | Cementitious composition containing asbestos fibres and prepared using a surfactant |
| WO1990015642A1 (en) * | 1989-06-15 | 1990-12-27 | Tony Nocito Inc. | Improved method and products for treating asbestos |
| CN1135956A (en) * | 1996-02-01 | 1996-11-20 | 李克文 | Process for manufacturing asbestos and cement tiles |
| WO2011096604A1 (en) * | 2010-02-05 | 2011-08-11 | 한국지질자원연구원 | Calcium aluminate clinker using waste material and manufacturing method thereof |
| CN109706575A (en) * | 2019-01-28 | 2019-05-03 | 英麒科技集团有限公司 | A kind of yarn carrying asbestos short fibre copy paper |
| JP2020099855A (en) * | 2018-12-20 | 2020-07-02 | 小倉商事株式会社 | Recovery method of harmful waste, recovery method of reuse material and harmful waste recovery system |
-
2021
- 2021-04-01 CN CN202110357966.0A patent/CN113443869A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1274665A (en) * | 1968-05-28 | 1972-05-17 | Nat Res Dev | Improvements in and relating to concrete mixes |
| GB1472944A (en) * | 1973-04-04 | 1977-05-11 | Ispra Spa | Opening of asbestos fibres |
| US4190456A (en) * | 1977-07-01 | 1980-02-26 | Ici Australia Limited | Cementitious composition containing asbestos fibres and prepared using a surfactant |
| WO1990015642A1 (en) * | 1989-06-15 | 1990-12-27 | Tony Nocito Inc. | Improved method and products for treating asbestos |
| CN1135956A (en) * | 1996-02-01 | 1996-11-20 | 李克文 | Process for manufacturing asbestos and cement tiles |
| WO2011096604A1 (en) * | 2010-02-05 | 2011-08-11 | 한국지질자원연구원 | Calcium aluminate clinker using waste material and manufacturing method thereof |
| JP2020099855A (en) * | 2018-12-20 | 2020-07-02 | 小倉商事株式会社 | Recovery method of harmful waste, recovery method of reuse material and harmful waste recovery system |
| CN109706575A (en) * | 2019-01-28 | 2019-05-03 | 英麒科技集团有限公司 | A kind of yarn carrying asbestos short fibre copy paper |
Non-Patent Citations (2)
| Title |
|---|
| 于士秀等: "DSA―5消泡剂在石棉水泥波瓦生产中的应用", 《混凝土与水泥制品》 * |
| 朱连荣: "提高石棉水泥瓦经济效益的综合分析", 《混凝土与水泥制品》 * |
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Application publication date: 20210928 |