CN105152601A - Preparation method of gangue base mine cemented filling material - Google Patents
Preparation method of gangue base mine cemented filling material Download PDFInfo
- Publication number
- CN105152601A CN105152601A CN201510626048.8A CN201510626048A CN105152601A CN 105152601 A CN105152601 A CN 105152601A CN 201510626048 A CN201510626048 A CN 201510626048A CN 105152601 A CN105152601 A CN 105152601A
- Authority
- CN
- China
- Prior art keywords
- coal gangue
- coal
- cemented filling
- mine
- cement
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a preparation method of a gangue base mine cemented filling material, and belongs to the field of mine filling materials. Cementing activity hidden in gangue is stimulated in a compound stimulation way, cement is partially replaced with the cementing activity to serve as a cementing material for cemented filling mining, and then the material is mixed with fine particle size gangue to be prepared into the mine cemented filling material. The process for preparing the mine cemented filling material is simple, large proportion dosage of gangue powder and cement is realized, the filling material has excellent mechanical property and stable conveying property, no segregation or no bleeding exists, the application of gangue in mine filling is broadened, the mine filling cost is reduced, the material conveying property is improved, at the same time, the purpose of effective use of gangue is realized, and mine filling is promoted to develop forward.
Description
Technical field
The present invention relates to a kind of preparation method of bastard coal ground mass mine cemented filling material, belong to filling in mine Material Field.
Background technology
Coal gangue is the solid slag discharged in coal mining and washing process, is one of maximum industrial solid castoff of the current quantity discharged of China, and it is accumulative stores up nearly 4,000,000,000 tons, land occupation more than 10,000 hectare, and still increases severely year by year with the quantity of about 100,000,000 tons.The coal gangue of bulk deposition not only occupies cultivated land, and very easily weathering and spontaneous combustion cause the pollution of air, soil and water even to cause serious geologic hazard, all cause extremely ill effect to ecotope and social environment.Therefore, the disposal of coal gangue becomes problem demanding prompt solution with effectively utilizing.
The utilization ways of current coal gangue mainly contains the calorific value that brickmaking, generating etc. utilize coal gangue itself to have and the direct utilization being directly used in the extensive style such as making building block, aggregate, backfill mine goaf or pavior after fragmentation, also the character utilizing coal gangue chemical composition close with clay is had to go to replace part or all of clay to produce cement, but because the performance requriements of surface structures engineering to cement apparent mass and intensity aspect is higher, so be difficult to when coal gangue is used for cement baking the requirement reaching construction work.Make the utilization ratio of coal gangue still less than 20%.
Along with the fast development of China coal industry, worked-out section area constantly expands, and subsidence, " three times " pressure coal problem are outstanding all the more.Mining with stowing technique preventing big area subsidence, liberation " three times " pressure coal, improve resource recovery rate, solve coal gangue ground stacking etc. in advantage further highlight, and compaction material mainly still serves as gelling material with silicate cement at present, aggregate is served as with the coal gangue after fragmentation, not only expensive, and transportation performance is unstable, seriously govern advancing of coal mine filling, be therefore necessary that a kind of new gelling material of exploitation is to replace cement to promote the development of cemented filling mining technology.
Compared with surface structures engineering, the requirement of filling in mine to compaction material is lower, and according to different roof conditions, require that strength of filling mass only needs 0 ~ 8MPa, general 0.5 ~ 4MP just can meet the demands.SiO in coal gangue
2, Al
2o
3for potential gelation activity composition, its gelling property can be ejected part to replace cement and serve as gelling material in cemented filling material, thus reduction cement consumption reaches the object reduced costs, solve coal gangue emission problem simultaneously, promote application and the popularization of colliery cemented backfilling technology, realize the green sustainable development of coal-mining industry.
Summary of the invention
The present invention aims to provide a kind of preparation method of bastard coal ground mass mine cemented filling material, through complex excitation mode, potential for coal gangue gelation activity is ejected, part replaces the gelling material that cement serves as mine cemented filling, then mine cemented filling material is hybridly prepared into fine grain size coal gangue, reduce compaction material cost, improve materials conveyance performance, reach the object effectively utilizing coal gangue simultaneously.
The preparation method of a kind of bastard coal ground mass mine cemented filling material provided by the invention, comprises the following steps:
(1) first large coal spoil is carried out fragmentation, make the particle size distribution after fragmentation in the scope of 0 ~ 5mm, for subsequent use;
The chemical composition of described coal gangue is: SiO
2: 35%-57%, Al
2o
3: 16%-25%, SiO
2, Al
2o
3for potential gelation activity material.And not containing radioelement.
(2) by the coal gangue grinding 45min-60min on ball mill after fragmentation in step (1), and sieve with 200 orders, 300 mesh standard sieves, obtain particle diameter and be less than 300 object coal gangue powder;
(3) colliery powder obtained in step (2) is placed in industrial furnace, is warmed up to calcining temperature 700 ~ 750 DEG C, is incubated after having calcined, soaking time is 2 ~ 2.5 hours;
(4) the calcining coal gangue powder in step (3) is taken out chilling;
Described chilling is directly taken out by calcining coal gangue powder to put cool to room temperature in atmosphere from industrial furnace.
(5) in step (4) cool to room temperature coal gangue powder in add chemical activator and premix 30s.
Described chemical activator is Al
2(SO
4)
3, NaOH, CaSO
42H
2o and be all analytical pure chemical reagent.Wherein each exciting agent and coal gangue quality proportioning are respectively:
NaOH：1~5∶100；
Al
2(SO4)
3：5~10∶100；
CaSO
4·2H
2O：1~5∶100；
(6) mixed with the coal gangue powder in step (5) and stir 120s by cement, fully namely obtain the gelling material of described mine cemented filling after mixing, wherein the quality proportioning of coal gangue powder and cement is:
Coal gangue powder: 50%-70%;
Cement: 30%-50%;
(7), after getting the fine grain size coal gangue in step (1) and the gelling material premix 30s in step (6), add water and stir and make mine cemented filling material, wherein the quality proportioning of fine grain size coal gangue and gelling material is:
Fine grain size coal gangue: 70%-80%;
Gelling material: 20%-30%;
The quality proportioning of water and gelling material is: 0.4-0.8:1.
Further, the cement in described step (6) is 42.5
#ordinary Portland cement.
In the present invention, coal gangue forms colliery powder after the complex excitation of thermal excitation, mechanical excitation and chemi-excitation, then makes gelling material with cement mixing.
Of the present invention
beneficial effect:
(1) improve that coal gangue added value is low, economic benefit is low, utilize the present situations such as technological lag; achieve the mass-producing of coal gangue, high value added utilization; make use of coal gangue more effectively and rationally, solve ecotope and social and environmental problems that the unordered stacking in coal gangue ground causes.
(2) utilize the present invention fill a prescription preparation bastard coal ground mass cemented filling material technique simple, the vast scale volume and the compaction material that achieve colliery powder and cement have good mechanical property, stable transportation performance, do not emanate, not bleeding, widen the application of coal gangue in filling in mine, reduce filling in mine cost, facilitate advancing of filling in mine.
(3) gelling property not only improving obturator in cement will be mixed after coal gangue grinding, and ultra-fine coal gangue powder add the pump-conveying property substantially increasing compaction material.
(4) by regulating the ratio exciting colliery powder, cement, chemical activator, fine grain size coal gangue volume, the obturator met under various roof condition can be made, and then promote the use of in different colliery, the green sustainable development that controlroof sinks, reduction subsidence, liberation " three times " pressure coal promote coal.
Embodiment
Further illustrate the present invention below by embodiment, but be not limited to following examples.
Embodiment 1:
(1) first large coal spoil jaw crushing crusher machine is sieved, by coal gangue size controlling in the scope of 0 ~ 5mm.
The active chemical of described coal gangue is: SiO
2: 35.46%, Al
2o
3: 16.11%
(2) 0 ~ 5mm of precise 18kg coal gangue and in ball mill grinding 45min, then carry out screening with 200 orders, 300 mesh standard sieves and obtain particle diameter to be less than 300 object colliery powders for subsequent use.
(3) the 18kg colliery powder in step (2) is all put into industrial furnace, be warmed up to 750 DEG C and calcine, and calcine 2 hours under the constant temperature of 750 DEG C.
(4) calcining coal gangue in step (3) is taken out chilling for subsequent use.
(5) in the colliery powder in step (4), add the Al of 1.62kg
2(SO
4)
3, 0.54kg the CaSO of NaOH, 0.84kg
42H
2the pulverous analytical pure chemical reagent of O, and premix 30s, make to mix between each component.
(6) precise 9kg 42.5
#ordinary Portland cement and the coal gangue sample mixed in step (5) stir 120s and make it fully to mix.
(7) get the gelling material premix 30s in the fine grain size coal gangue 70kg of 0 ~ 5mm in step (1) and step (6), then accurately claim the tap water of 21kg to join in mixing material and stir 120s again.Namely described mine cemented filling material is obtained.Carry out the test of slump, divergence, ultimate compression strength.
Table 1
Embodiment 2:
(1) first large coal spoil jaw crushing crusher machine is sieved, by coal gangue size controlling in the scope of 0 ~ 5mm.
The active chemical of described coal gangue is: SiO
2: 50.33%, Al
2o
3: 23.46%
(2) 0 ~ 5mm of precise 15kg coal gangue and in ball mill grinding 60min, then carry out screening with 200 orders, 300 mesh standard sieves and obtain particle diameter to be less than 300 object colliery powders for subsequent use.
(3) the 15kg colliery powder in step (2) is all put into industrial furnace, be warmed up to 700 DEG C and calcine, and calcine 2.5 hours under the constant temperature of 700 DEG C.
(4) calcining coal gangue in step (3) is taken out chilling for subsequent use.
(5) in the colliery powder in step (4), add the Al of 1.20kg
2(SO
4)
3, 0.60kg the CaSO of NaOH, 0.45kg
42H
2the pulverous analytical pure chemical reagent of O, and premix 30s, make to mix between each component.
(6) precise 10kg 42.5
#ordinary Portland cement and the coal gangue sample mixed in step (5) stir 120s and make it fully to mix.
(7) get the gelling material premix 30s in the fine grain size coal gangue 75kg of 0 ~ 5mm in step (1) and step (6), then the tap water of precise 17.5kg joins in mixing material and stirs 120s again.Namely described mine cemented filling material is obtained.Carry out the test of slump, divergence, ultimate compression strength.
Table 2
In order to ensure the Cemented filling performance that compaction material is good and the good mechanical strength of obturator, require that compaction material slump should be not less than 180mm, intensity is 0 ~ 8MPa.All 180mm is greater than by table 1, the known mine cemented filling material slump made by the present invention of table 2, well reach the requirement of filling in mine Cemented filling to material property, within 7 days, ultimate compression strength is more than 8MPa, well reaches the requirement of filling in mine to strength of filling mass.To sum up, the mine cemented filling material configured by the present invention has good transportation performance and mechanical property, can promote the use of in different colliery, the green sustainable development that controlroof sinks, reduction subsidence, liberation " three times " pressure coal promote coal.
Claims (5)
1. a preparation method for bastard coal ground mass mine cemented filling material, is characterized in that: comprise the following steps:
(1) first large coal spoil is carried out fragmentation, make the particle size distribution after fragmentation in the scope of 0 ~ 5mm, for subsequent use;
(2) by the coal gangue grinding 45min-60min on ball mill after fragmentation in step (1), and sieve with 200 orders, 300 mesh standard sieves, obtain particle diameter and be less than 300 object coal gangue powder;
(3) colliery powder obtained in step (2) is placed in industrial furnace, is warmed up to calcining temperature 700 ~ 750 DEG C, is incubated after having calcined, soaking time is 2 ~ 2.5 hours;
(4) the calcining coal gangue powder in step (3) is taken out chilling;
(5) in step (4) cool to room temperature coal gangue powder in add chemical activator and premix 30s;
Described chemical activator is Al
2(SO
4)
3, NaOH, CaSO
42H
2o;
(6) mixed with the coal gangue powder in step (5) and stir 120s by cement, fully namely obtain the gelling material of described mine cemented filling after mixing, wherein the quality proportioning of coal gangue powder and cement is:
Coal gangue powder: 50%-70%;
Cement: 30%-50%;
(7), after getting the fine grain size coal gangue in step (1) and the gelling material premix 30s in step (6), add water and stir and make mine cemented filling material; Wherein the quality proportioning of fine grain size coal gangue and gelling material is:
Fine grain size coal gangue: 70%-80%;
Gelling material: 20%-30%;
The quality proportioning of water and gelling material is: 0.4-0.8:1.
2. the preparation method of bastard coal ground mass mine cemented filling material according to claim 1, is characterized in that: the chemical composition of described coal gangue is: SiO
2: 35%-57%, Al
2o
3: 16%-25%; Wherein SiO
2, Al
2o
3for potential gelation activity material, and not containing radioelement.
3. the preparation method of bastard coal ground mass mine cemented filling material according to claim 1, is characterized in that: described chilling is directly taken out by calcining coal gangue powder to put cool to room temperature in atmosphere from industrial furnace.
4. the preparation method of bastard coal ground mass mine cemented filling material according to claim 1, is characterized in that: the quality proportioning of described chemical activator and coal gangue is respectively:
NaOH：1~5∶100；
Al
2(SO
4)
3：5~10∶100；
CaSO
4·2H
2O：1~5∶100。
5. the preparation method of bastard coal ground mass mine cemented filling material according to claim 1, is characterized in that: the cement in described step (6) is 42.5# ordinary Portland cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510626048.8A CN105152601B (en) | 2015-09-28 | 2015-09-28 | A kind of preparation method of bastard coal ground mass mine cemented filling material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510626048.8A CN105152601B (en) | 2015-09-28 | 2015-09-28 | A kind of preparation method of bastard coal ground mass mine cemented filling material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105152601A true CN105152601A (en) | 2015-12-16 |
| CN105152601B CN105152601B (en) | 2017-07-18 |
Family
ID=54793723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510626048.8A Active CN105152601B (en) | 2015-09-28 | 2015-09-28 | A kind of preparation method of bastard coal ground mass mine cemented filling material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105152601B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105622013A (en) * | 2015-12-24 | 2016-06-01 | 六盘水师范学院 | Method for preparing high-performance concrete by using gangue as main raw material |
| CN106242389A (en) * | 2016-07-18 | 2016-12-21 | 太原理工大学 | A kind of method utilizing coffee grounds to prepare colliery residual stope filling mastic |
| CN106278131A (en) * | 2016-07-18 | 2017-01-04 | 太原理工大学 | A kind of method utilizing red mud to prepare colliery residual stope filling mastic |
| CN107917836A (en) * | 2017-12-08 | 2018-04-17 | 河南理工大学 | The preparation facilities of filler experiment of machanics standard specimen and the method that standard specimen is made using the device |
| CN107989651A (en) * | 2017-11-27 | 2018-05-04 | 固岩科技发展有限公司 | A kind of method in foam phosphorus slag material filling mine |
| CN111454020A (en) * | 2020-03-26 | 2020-07-28 | 张延年 | Multi-solid waste pit backfill pouring stone and production process thereof |
| CN112321203A (en) * | 2020-10-10 | 2021-02-05 | 上海友品环境服务有限公司 | Formula and process for backfilling mine from bulk solid waste |
| CN113213787A (en) * | 2021-05-28 | 2021-08-06 | 王庆乐 | Production process for preparing alkali cementing material from coal gangue |
| CN113233797A (en) * | 2020-09-21 | 2021-08-10 | 合肥工业大学 | Coal gangue-based cementing material and preparation method thereof |
| CN113620682A (en) * | 2021-08-27 | 2021-11-09 | 河南同本科技有限公司 | Preparation method and application method of special rapid-setting mortar for mine |
| CN114165280A (en) * | 2021-11-03 | 2022-03-11 | 李龙清 | Column type goaf filling reconstruction coal seam comprehensive mechanical stoping method |
| CN115028411A (en) * | 2022-06-13 | 2022-09-09 | 太原理工大学 | Full-grade gangue filling paste for ultra-far pumping and preparation method thereof |
| CN115259758A (en) * | 2022-07-25 | 2022-11-01 | 中国矿业大学 | Millimeter-grade gangue slurry proportion optimization and preparation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693268A (en) * | 2005-04-07 | 2005-11-09 | 刘兴才 | Delay coagulated slew expansion filling powder |
| CN102603241A (en) * | 2012-03-26 | 2012-07-25 | 西安科技大学 | Coal mine goaf filling material made of gangue |
| CZ25398U1 (en) * | 2013-02-13 | 2013-05-20 | Vysoká skola bánská-Technická univerzita Ostrava | Heat-insulating alkali activated filling material based on siopor |
| CN104556917A (en) * | 2014-12-22 | 2015-04-29 | 咸阳东方雨虹建筑材料有限公司 | High-early-strength filling material for coal mine goaf |
| CN104829200A (en) * | 2015-04-16 | 2015-08-12 | 中国矿业大学(北京) | Alkali-activated fly-ash filling material and preparation method thereof |
-
2015
- 2015-09-28 CN CN201510626048.8A patent/CN105152601B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693268A (en) * | 2005-04-07 | 2005-11-09 | 刘兴才 | Delay coagulated slew expansion filling powder |
| CN102603241A (en) * | 2012-03-26 | 2012-07-25 | 西安科技大学 | Coal mine goaf filling material made of gangue |
| CZ25398U1 (en) * | 2013-02-13 | 2013-05-20 | Vysoká skola bánská-Technická univerzita Ostrava | Heat-insulating alkali activated filling material based on siopor |
| CN104556917A (en) * | 2014-12-22 | 2015-04-29 | 咸阳东方雨虹建筑材料有限公司 | High-early-strength filling material for coal mine goaf |
| CN104829200A (en) * | 2015-04-16 | 2015-08-12 | 中国矿业大学(北京) | Alkali-activated fly-ash filling material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 陈杰等: "基于采空区充填材料的煤矸石活化机理研究", 《太原理工大学学报》 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105622013A (en) * | 2015-12-24 | 2016-06-01 | 六盘水师范学院 | Method for preparing high-performance concrete by using gangue as main raw material |
| CN106242389A (en) * | 2016-07-18 | 2016-12-21 | 太原理工大学 | A kind of method utilizing coffee grounds to prepare colliery residual stope filling mastic |
| CN106278131A (en) * | 2016-07-18 | 2017-01-04 | 太原理工大学 | A kind of method utilizing red mud to prepare colliery residual stope filling mastic |
| CN107989651A (en) * | 2017-11-27 | 2018-05-04 | 固岩科技发展有限公司 | A kind of method in foam phosphorus slag material filling mine |
| CN107917836A (en) * | 2017-12-08 | 2018-04-17 | 河南理工大学 | The preparation facilities of filler experiment of machanics standard specimen and the method that standard specimen is made using the device |
| CN111454020A (en) * | 2020-03-26 | 2020-07-28 | 张延年 | Multi-solid waste pit backfill pouring stone and production process thereof |
| CN113233797A (en) * | 2020-09-21 | 2021-08-10 | 合肥工业大学 | Coal gangue-based cementing material and preparation method thereof |
| CN113233797B (en) * | 2020-09-21 | 2023-01-06 | 合肥工业大学 | Coal gangue-based cementing material and preparation method thereof |
| CN112321203A (en) * | 2020-10-10 | 2021-02-05 | 上海友品环境服务有限公司 | Formula and process for backfilling mine from bulk solid waste |
| CN113213787A (en) * | 2021-05-28 | 2021-08-06 | 王庆乐 | Production process for preparing alkali cementing material from coal gangue |
| CN113620682A (en) * | 2021-08-27 | 2021-11-09 | 河南同本科技有限公司 | Preparation method and application method of special rapid-setting mortar for mine |
| CN114165280A (en) * | 2021-11-03 | 2022-03-11 | 李龙清 | Column type goaf filling reconstruction coal seam comprehensive mechanical stoping method |
| CN115028411A (en) * | 2022-06-13 | 2022-09-09 | 太原理工大学 | Full-grade gangue filling paste for ultra-far pumping and preparation method thereof |
| CN115259758A (en) * | 2022-07-25 | 2022-11-01 | 中国矿业大学 | Millimeter-grade gangue slurry proportion optimization and preparation method |
| CN115259758B (en) * | 2022-07-25 | 2023-06-23 | 中国矿业大学 | Millimeter-level gangue slurry proportion optimization and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105152601B (en) | 2017-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105152601A (en) | Preparation method of gangue base mine cemented filling material | |
| CN101767972B (en) | Mine tailing sand brick and preparation method thereof | |
| CN101691291B (en) | Method for producing pasty unclassified tailing filling materials containing red mud | |
| CN109928685B (en) | Quick-hardening early-strength concrete prepared from various industrial solid wastes and preparation method thereof | |
| CN102765889B (en) | Preparation method for tailing barren rock-made high-strength concrete containing coal ash | |
| CN102887693B (en) | Filling and consolidating powder for mining purposes and use thereof | |
| CN102865101B (en) | Filling method and system of coal mine goaf | |
| CN105016690A (en) | Method for production of concrete from water quenched nickel-iron slag | |
| CN105330180A (en) | Early-strength low-heat Portland cement and preparation method thereof | |
| CN110330243A (en) | A kind of no first-hand datum tailing filling novel gelled material | |
| CN104987117A (en) | Environment-friendly building thermal insulation materials | |
| CN110781587B (en) | Multi-objective optimization method for anti-segregation waste rock filling slurry by using low-quality solid waste | |
| CN103435281A (en) | Cement clinker and preparation process thereof | |
| CN102745932A (en) | Preparation method and application of PD composite mineral admixture containing silica fume | |
| CN105778886A (en) | Low-density high-strength ceramsite proppant and preparation process thereof | |
| CN107365129A (en) | It is a kind of to utilize the method for being classified tail salt production sylvite ore cemented filling material | |
| CN104556917A (en) | High-early-strength filling material for coal mine goaf | |
| CN104844023A (en) | Method for manufacturing mine filling material by curing copper tailing using iron tailing | |
| CN103979815B (en) | A kind of obturator swelling agent for mining with stowing and preparation method thereof | |
| CN107473613B (en) | A kind of cement and preparation method thereof using industrial solid-state castoff production | |
| CN112897971A (en) | Self-flowing cemented filling material containing superfine tail mud and preparation method and application thereof | |
| CN105967595A (en) | Baking-free brick prepared by oil-based drill cutting residues | |
| CN108947312A (en) | A kind of early-strength function grinding aid | |
| CN105481271A (en) | Low-alkali cement prepared from copper mine tailing and preparation method thereof | |
| CN103803819A (en) | Silicate cement clinker prepared by using marble powder and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |