CN115229967A - Production process of thin-wall lining of nodular cast iron pipe - Google Patents
Production process of thin-wall lining of nodular cast iron pipe Download PDFInfo
- Publication number
- CN115229967A CN115229967A CN202210561247.5A CN202210561247A CN115229967A CN 115229967 A CN115229967 A CN 115229967A CN 202210561247 A CN202210561247 A CN 202210561247A CN 115229967 A CN115229967 A CN 115229967A
- Authority
- CN
- China
- Prior art keywords
- lining
- thin
- pipe
- cast iron
- iron pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000004568 cement Substances 0.000 claims abstract description 39
- 238000003756 stirring Methods 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims abstract description 13
- 239000004570 mortar (masonry) Substances 0.000 claims description 18
- 239000004615 ingredient Substances 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 239000003651 drinking water Substances 0.000 claims description 3
- 235000020188 drinking water Nutrition 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- YALMXYPQBUJUME-UHFFFAOYSA-L calcium chlorate Chemical compound [Ca+2].[O-]Cl(=O)=O.[O-]Cl(=O)=O YALMXYPQBUJUME-UHFFFAOYSA-L 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000011083 cement mortar Substances 0.000 abstract description 10
- 230000001603 reducing effect Effects 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 5
- 239000000654 additive Substances 0.000 abstract description 4
- 230000000996 additive effect Effects 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003334 potential effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0023—Lining the inner wall of hollow objects, e.g. pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/003—Methods for mixing
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/0016—Granular materials, e.g. microballoons
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The invention discloses a process for producing a thin-wall lining of a nodular cast iron pipe, which comprises the steps of measuring the addition amount of required ultrafine powder, high-alumina cement and sand by a measuring system, and stirring the ultrafine powder to form a first mixed material; then putting the high-alumina cement into the first mixed material for stirring, and adding a proper amount of water source during stirring to form a second mixed material; the invention adopts ultrafine powder to replace part of high-alumina cement, can fill cement mortar pores, plays a role in physical water reduction, has low price, can obviously improve the slump of concrete and improve the slump fluidity of concrete while effectively reducing the production cost, can improve the workability of cement mortar by using ultrafine powder as an additive to replace high-alumina cement, avoids the generation of crack defects of a high-alumina cement lining from the source, and obviously improves the apparent quality of the lining.
Description
Technical Field
The invention relates to the technical field of metallurgical casting, in particular to a process for producing a thin-wall lining of a nodular cast iron pipe.
Background
The ductile cast iron pipe has the characteristics of iron nature and steel performance, high strength, high elongation, excellent corrosion resistance and the like, and is widely applied to water supply and drainage medium pipelines and used for conveying different media such as drinking water, sewage, reclaimed water and the like. The cast pipe lining can effectively protect the cast pipe body and ensure long-term and effective operation of the cast pipe pipeline.
The high-alumina cement lined with aluminate cement has the characteristics of high hardening speed, high strength, wear resistance, corrosion resistance and the like. The ductile cast iron pipe is lined with high-alumina cement, the high-alumina cement and sand are taken as raw materials, and a certain amount of water is added to prepare cement mortar; the centrifugal lining technology is adopted during the lining of the cast pipe, the surface is smooth and compact, the wear resistance and the corrosion resistance are good, the sewage with the pH value of 4-12 can be conveyed, and the application prospect is wide.
Because the thickness of the high-alumina cement mortar lining is only 3-6 mm, the high-alumina cement mortar lining is also called a thin-wall lining, and the surface of the thin-wall lining is easy to have the defects of cracks and the like. Meanwhile, the high-alumina cement is expensive and 4 to 5 times of common cement, and the market application of the high-alumina cement lining is limited to a great extent.
Disclosure of Invention
The invention aims to provide a production process of a nodular cast iron pipe thin-wall lining, which aims to solve the problems in the background technology and has the characteristics of obviously reducing lining cost, improving the workability of cement mortar, improving the quality of the lining, eliminating crack defects, reducing water consumption of the lining and the like.
In order to achieve the purpose, the invention provides the following technical scheme:
a process for producing a thin-wall lining of a nodular cast iron pipe comprises the following steps:
(S1) metering the addition amount of the required ultrafine powder through a metering system, and adding the ultrafine powder into primary lining stirring equipment to form a first mixed material;
(S2) metering the addition amount of the required high-alumina cement through a metering system, adding the high-alumina cement into primary lining stirring equipment, and adding a proper amount of water source during stirring to form a second mixed material;
(S3) metering the required addition amount of the sand through a metering system, adding the sand into primary lining stirring equipment, and adding the required residual water source during stirring to form a mortar ingredient;
(S4) discharging the mortar ingredients into lining secondary stirring equipment, and continuously stirring;
(S5) starting a supporting wheel of a feeding station to rotate the cast tube, and simultaneously driving a distributing rod to enter the cast tube by a distributing trolley;
(S6) starting a slurry pump, distributing the mortar through a distributing rod, and returning the distributing rod while distributing until the distribution is finished;
and (S7) starting the material distribution station supporting wheel to rotate the casting pipe, so that the mortar ingredients are uniform in thickness under the action of centrifugal force.
As a further scheme of the invention, the specific surface area of the ultrafine powder in the step S1 is 390-420m2/kg, and the specific surface area of the high alumina cement in the step S2 is 300m2/kg.
As a further scheme of the invention, in the step S2, the high-alumina cement is a hydraulic cementing material formed by grinding mainly calcium chlorate and secondarily clinker with 50% of alumina content.
As a further scheme of the invention, when the mixed material is formed in the step S1, the mixed material is uniformly mixed and stirred for one minute.
As a further scheme of the invention, when the second mixed material is formed in the step S2, the second mixed material is uniformly mixed and stirred for two minutes.
As a further scheme of the invention, the water source in the step S2 and the step S3 is drinking water or a water source which is harmless to mortar and water conveyed in a pipeline.
As a further scheme of the present invention, when the mortar ingredients are formed in step S3, the mortar ingredients are uniformly mixed and stirred for four minutes.
As a further scheme of the invention, the mass fraction of the particles with the sand granularity of less than 75 μm in the step S3 is not more than 2% of the total amount of the lining sand.
As a further aspect of the present invention, the rotation of the cast pipe in said step S5 is used for checking the ovality and straightness of the pipe and lining the cast pipe.
As a further aspect of the present invention, the thickness of the lining layer of the cast pipe in step S7 is classified into three types as follows:
the thickness of the first type DN80-DN300 cast pipe lining layer is 3mm;
the thickness of the second type DN350-DN600 cast pipe lining is 5mm;
the third type DN700-DN1200 cast pipe lining had a thickness of 6mm.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts the ultrafine powder to replace part of the high-alumina cement, can fill the pores of the cement mortar, has a certain physical water reducing effect, has low price, can obviously improve the slump of the concrete and improve the slump fluidity of the concrete while effectively reducing the production cost, can improve the workability of the cement mortar by using the ultrafine powder as an additive to replace the high-alumina cement, avoids the crack defect of the high-alumina cement lining from the source, and obviously improves the apparent quality of the lining.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention. In addition, for the convenience of description, the terms "upper", "lower", "left" and "right" are used to refer to the same direction, and the terms "first" and "second" are used for descriptive distinction and have no special meaning.
Examples
A process for producing a thin-wall lining of a nodular cast iron pipe comprises the following steps:
(S1) metering the addition amount of the required ultrafine powder through a metering system, and adding the ultrafine powder into primary lining stirring equipment to form a first mixed material;
(S2) metering the addition amount of the required high-alumina cement through a metering system, adding the high-alumina cement into primary lining stirring equipment, and adding a proper amount of water source during stirring to form a second mixed material;
(S3) measuring the required sand addition amount through a measuring system, adding the sand into primary lining stirring equipment, and adding the required residual water source during stirring to form a mortar ingredient;
(S4) discharging the mortar ingredients into lining secondary stirring equipment, and continuously stirring;
(S5) starting a riding wheel of a feeding station to enable the casting pipe to rotate, and enabling the distributing rod to enter the casting pipe under the driving of a distributing trolley;
(S6) starting a slurry pump, distributing the mortar ingredients through a distributing rod, and withdrawing the distributing rod while distributing the mortar ingredients until the distribution is finished;
and (S7) starting the material distribution station supporting wheel to rotate the casting pipe, so that the mortar ingredients are uniform in thickness under the action of centrifugal force.
The preparation method of the invention is based on the following design:
the superfine powder is used as an additive to replace part of high-alumina cement, so that the lining requirement is met, and the aims of reducing cost and improving the lining quality are fulfilled. The specific surface area of the superfine powder reaches 390-420m2/kg, the specific surface area of the high-alumina cement is 300m2/kg, and the superfine powder has larger specific surface area and higher potential activity compared with the high-alumina cement. The ultrafine powder replaces high-alumina cement, can fill pores of cement mortar, and has a certain physical water reducing effect. The superfine powder is cheap, and can obviously improve the slump of concrete and the slump fluidity of the concrete. The ultrafine powder is used as an additive to replace high-alumina cement, so that the workability of cement mortar can be improved, the crack defect of the high-alumina cement lining is prevented from occurring from the source, and the apparent quality of the lining is obviously improved.
Therefore, the ultrafine powder is used for replacing high-alumina cement, and the requirement of the lining is met.
The strength tests were carried out for 3 days and 28 days using 100% of aluminous cement and 20% of micropowder instead of aluminous cement, respectively, with the test results as given in the following table:
the 20 percent of ultrafine powder replaces high-alumina cement, the early-stage compressive strength and compressive strength are slightly reduced compared with those of 100 percent of high-alumina cement, but the later-stage compressive strength and compressive strength are increased faster, and the requirement that the compressive strength of the lining is more than 50MPa is completely met.
DN80-DN300 cast tube, which meets the requirement of thin-wall lining of cast tube (the thickness of lining is 3 mm), 20% ultra-fine powder is used to replace high alumina cement, and the components are added as follows:
| raw materials | Required amount (kg) |
| High alumina cement | 300 |
| Ultra-fine powder | 75 |
| Sand | 525 |
| Water source | 202 |
DN350-DN 1200 cast tube, which meets the requirement of thin-wall lining of cast tube (the thickness of lining is 5-6 mm), 20% ultra-fine powder is used to replace high alumina cement, and the components are added as follows:
the above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (10)
1. A process for producing a thin-wall lining of a nodular cast iron pipe is characterized by comprising the following steps: the production steps of the ductile cast iron pipe thin-wall lining are as follows:
(S1) metering the addition amount of the required ultrafine powder through a metering system, and adding the ultrafine powder into primary lining stirring equipment to form a first mixed material;
(S2) metering the addition amount of the required high-alumina cement through a metering system, adding the high-alumina cement into primary lining stirring equipment, and adding a proper amount of water source during stirring to form a second mixed material;
(S3) measuring the required sand addition amount through a measuring system, adding the sand into primary lining stirring equipment, and adding the required residual water source during stirring to form a mortar ingredient;
(S4) discharging the mortar ingredients into lining secondary stirring equipment, and continuously stirring;
(S5) starting a riding wheel of a feeding station to enable the casting pipe to rotate, and enabling the distributing rod to enter the casting pipe under the driving of a distributing trolley;
(S6) starting a slurry pump, distributing the mortar through a distributing rod, and returning the distributing rod while distributing until the distribution is finished;
and (S7) starting the material distribution station supporting wheel to rotate the casting pipe, so that the mortar ingredients are uniform in thickness under the action of centrifugal force.
2. The process for producing the ductile cast iron pipe thin-wall lining according to claim 1, wherein: the specific surface area of the ultrafine powder in the step S1 is 390-420m2/kg, and the specific surface area of the high alumina cement in the step S2 is 300m2/kg.
3. The process for producing a thin-walled lining of a ductile cast iron pipe according to claim 1, wherein: and in the step S2, the high-alumina cement is a hydraulic cementing material formed by grinding mainly calcium chlorate and secondarily clinker with the alumina content of 50%.
4. The process for producing a thin-walled lining of a ductile cast iron pipe according to claim 1, wherein: and when the mixed material is formed in the step S1, uniformly mixing and stirring for one minute.
5. The process for producing the ductile cast iron pipe thin-wall lining according to claim 1, wherein: and when the second mixed material is formed in the step S2, uniformly mixing and stirring for two minutes.
6. The process for producing the ductile cast iron pipe thin-wall lining according to claim 1, wherein: the water source in the step S2 and the step S3 is drinking water or a water source which is harmless to mortar and water conveyed in a pipeline.
7. The process for producing the ductile cast iron pipe thin-wall lining according to claim 1, wherein: and (4) uniformly mixing and stirring for four minutes when the mortar ingredients are formed in the step (S3).
8. The process for producing the ductile cast iron pipe thin-wall lining according to claim 1, wherein: the mass fraction of the particles with the sand granularity of less than 75 mu m in the step S3 is not more than 2 percent of the total amount of the lining sand.
9. The process for producing the ductile cast iron pipe thin-wall lining according to claim 1, wherein: the rotation of the cast pipe in said step S5 serves to check the ovality and straightness of the pipe and to line the cast pipe.
10. The process for producing a thin-walled lining of a ductile cast iron pipe according to claim 1, wherein: the thickness of the lining layer of the cast pipe in the step S7 is divided into the following three types:
the thickness of the first type DN80-DN300 cast pipe lining layer is 3mm;
the thickness of the second type DN350-DN600 cast pipe lining is 5mm;
the third type DN700-DN1200 cast pipe lining has a thickness of 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210561247.5A CN115229967A (en) | 2022-05-23 | 2022-05-23 | Production process of thin-wall lining of nodular cast iron pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210561247.5A CN115229967A (en) | 2022-05-23 | 2022-05-23 | Production process of thin-wall lining of nodular cast iron pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115229967A true CN115229967A (en) | 2022-10-25 |
Family
ID=83668181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210561247.5A Withdrawn CN115229967A (en) | 2022-05-23 | 2022-05-23 | Production process of thin-wall lining of nodular cast iron pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115229967A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115893960A (en) * | 2022-11-03 | 2023-04-04 | 新兴铸管股份有限公司 | Mortar lining material, nodular cast iron pipe lining for sewage and manufacturing method of mortar lining material and nodular cast iron pipe lining |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02217346A (en) * | 1989-02-15 | 1990-08-30 | Denki Kagaku Kogyo Kk | Lining material and production of lined pipe using same material |
| CN102320792A (en) * | 2011-05-30 | 2012-01-18 | 圣戈班管道系统有限公司 | Ductile cast iron pipe lining layer compound, ductile cast iron pipe comprising same and preparation method |
| CN111704420A (en) * | 2020-05-30 | 2020-09-25 | 同济大学 | Corrosion-resistant aluminate cement pipeline and preparation method thereof |
| CN112284793A (en) * | 2020-09-29 | 2021-01-29 | 新兴铸管股份有限公司 | Nodular cast iron pipe aluminate cement mortar lining sampling equipment and identification method |
| CN216329202U (en) * | 2021-10-20 | 2022-04-19 | 新兴河北工程技术有限公司 | Cement mortar braking preparation system for ductile cast iron pipe lining |
-
2022
- 2022-05-23 CN CN202210561247.5A patent/CN115229967A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02217346A (en) * | 1989-02-15 | 1990-08-30 | Denki Kagaku Kogyo Kk | Lining material and production of lined pipe using same material |
| CN102320792A (en) * | 2011-05-30 | 2012-01-18 | 圣戈班管道系统有限公司 | Ductile cast iron pipe lining layer compound, ductile cast iron pipe comprising same and preparation method |
| CN111704420A (en) * | 2020-05-30 | 2020-09-25 | 同济大学 | Corrosion-resistant aluminate cement pipeline and preparation method thereof |
| CN112284793A (en) * | 2020-09-29 | 2021-01-29 | 新兴铸管股份有限公司 | Nodular cast iron pipe aluminate cement mortar lining sampling equipment and identification method |
| CN216329202U (en) * | 2021-10-20 | 2022-04-19 | 新兴河北工程技术有限公司 | Cement mortar braking preparation system for ductile cast iron pipe lining |
Non-Patent Citations (1)
| Title |
|---|
| 申发田等: "球墨铸铁管内外表面防腐技术", 《铸造设备与工艺》, no. 2, pages 36 - 38 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115893960A (en) * | 2022-11-03 | 2023-04-04 | 新兴铸管股份有限公司 | Mortar lining material, nodular cast iron pipe lining for sewage and manufacturing method of mortar lining material and nodular cast iron pipe lining |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20221025 |