CN106746980A - A kind of utilization red mud solid waste prepares the method with photo-catalysis function cement mortar - Google Patents
A kind of utilization red mud solid waste prepares the method with photo-catalysis function cement mortar Download PDFInfo
- Publication number
- CN106746980A CN106746980A CN201611114316.9A CN201611114316A CN106746980A CN 106746980 A CN106746980 A CN 106746980A CN 201611114316 A CN201611114316 A CN 201611114316A CN 106746980 A CN106746980 A CN 106746980A
- Authority
- CN
- China
- Prior art keywords
- red mud
- solid waste
- photo
- cement mortar
- catalysis function
- 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.)
- Pending
Links
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
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0409—Waste from the purification of bauxite, e.g. red mud
-
- 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
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0081—Uses not provided for elsewhere in C04B2111/00 as catalysts or catalyst carriers
- C04B2111/00827—Photocatalysts
-
- 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 method with photo-catalysis function cement mortar is prepared the invention discloses a kind of utilization red mud solid waste, is to take red mud solid waste to be sintered 2~5 hours at 500~600 DEG C, sieving is obtained the graininess red mud of 0.12mm~0.15mm；Then mixed with cement, sand, polycarboxylate water-reducer and water and the cement mortar with photo-catalysis function is obtained.Present invention utilizes the Fe in sintering red mud2O3、TiO2、V2O5There is photocatalysis after sunshine is absorbed in photochemical catalyst, nitrogen oxides and volatile organic matter (VOC) in real-time catalytic eliminating atmospheric environment, play the function of Cleaning Air, the utilization of red mud solid waste is expanded and has improve its added value simultaneously, the purpose of sustainable development is reached, with important Social benefit and economic benefit.
Description
Technical field
The invention belongs to cement mortar technical field.Specifically related to a kind of preparation using red mud solid waste is urged with light
The method for changing functional cement mortar.
Background technology
Red mud is that bauxite extracts the contaminative waste residue produced during aluminum oxide in aluminium industry, and average often produces 1 ton
Aluminum oxide incidentally discharges 1.0~1.2 tons of red muds.It is mainly by building for the method for the extensive disposal of red mud in the world at present
Red mud dump, is stacked for a long time.The construction of red mud dump can be using mountain valley dell and other places in mountain area according to residing geographical position
Shape is built；Dell construction can be gone out using heap on level land in plains region；In area of bordering on the sea directly inputs deep-sea using pipeline, make
Its natural sediment is in methods such as seabeds.This method takes a large amount of soils, and chemical composition infiltrates soil in red mud, easily causes soil
The ecological environment problems such as ground alkalization, bogginess, underground water pollution.Current resource scarcity, environmental protection become more and more important it is current
Society, the recycling and its comprehensive regulation of red mud have become focal issue.
The primary chemical of red mud constitutes (mass percent)：SiO2(11.89%), Al2O3(18.00%), CaO
(15.45%), Fe2O3(35.98%), MgO (0.421%), MnO (0.142%), TiO2(6.786%), V2O5(0.101%),
Na2O (7.087%), K2O (0.121%), ZrO2(0.394%), P2O5(0.186%), SO3(0.387%), Cr2O3
(0.315%), other (2.72%).
The comprehensive utilization of red mud solid wastes recycling is concentrated mainly on following field at present：(1) recovery of metallic element.In red mud
The recycling of the valuable metals such as substantial amounts of aluminium, titanium, calcium, iron, scandium.(2) construction material application field.Glue is prepared using red mud
Gel material, road surface base layer material, building material etc..(3) environment remediation field.Red mud particle to the precious metal ion in water body and
P, As etc. have preferable suction-operated, and polluted-water can be purified；Red mud treatment sulfur dioxide, hydrogen sulfide, nitrogen oxidation
The gas pollutants such as thing.
The scale high added value comprehensive utilization of red mud is constantly subjected to the concern of material, environment and industrial circle.Such as patent
CN102240551B, by dealkalize, acidification, precipitation, calcining, is obtained visible light catalyst with red mud as raw material.It is prepared
Photocatalysis have specific surface area it is big, it is simple to operate the characteristics of.Patent CN103537298B is useless with the industrial solid of different sources
Gurry red mud is raw material, under the exciting of chemical activator, prepares red mud based polyalcohol photochemical catalyst, is realized to the complete of red mud
Utilize, three-waste free discharge, and be applied to photocatalytic hydrogen production by water decomposition reaction, catalyst can be recycled.
With the development of modern industry, volatile organic matter (VOC) and nitrogen oxygen in large quantity of exhaust gas and vehicle emissions
Compound (NOx) causes severe contamination to atmospheric environment, and serious threat is constituted to health, it has also become must in face of and urgently
Problem to be solved.Although turning into one of effective means for improving air quality with photocatalysis absorption, degraded VOC and NOx.But
It is to prepare cement mortar to realize light catalytic purifying using red mud solid waste through to substantial amounts of patent and literature retrieval
The patent of VOC and NOx has not been reported in air.
The content of the invention
For the defect of prior art, prepared using red mud solid waste it is an object of the present invention to provide one kind and urged with light
The method for changing functional cement mortar.
Utilization red mud solid waste of the present invention prepares the method with photo-catalysis function cement mortar, is by visit
The red mud solid waste that ear method, sintering process or combination method are obtained is prepared into graininess red mud, then with cement, sand, poly- carboxylic
Sour water reducer and water mix and the cement mortar with photo-catalysis function are obtained；
It is characterized in that：
The preparation process of the graininess red mud is：
(1) red mud solid waste is weighed, is sintered 2~5 hours at 500~600 DEG C；
(2) the red mud solid waste after step (1) is sintered is crushed, and crosses 100 mesh~120 mesh sieves, makes the grain diameter be
0.12mm~0.15mm, that is, obtain graininess red mud；
The mass ratio that the graininess red mud mixes with cement, sand, polycarboxylate water-reducer and water is：200~300:
100:100~500:0.2~0.3:30~50.
Above-mentioned utilization red mud solid waste is prepared in the method with photo-catalysis function cement mortar：Step (1) is described
The temperature for sintering red mud solid waste is preferably 550~600 DEG C, and the time is preferably 3~4 hours.Most preferably：Sintering red mud
The temperature of solid waste is 550 DEG C, and the time is 3.5 hours.
Above-mentioned utilization red mud solid waste is prepared in the method with photo-catalysis function cement mortar：The graininess is red
The mass ratio that mud mixes with cement, sand, polycarboxylate water-reducer and water is preferably：250~300:100:300:0.3:40~45.
The obtained cement mortar with photo-catalysis function of the method for the invention and its organic in catalytic eliminating volatility
Thing (VOC), nitrogen oxides (NOx), realize the application in Cleaning Air.
Make to the addition of in cement mortar component the Fe after sintering processes in red mud using the method for the invention2O3、TiO2、
V2O5, there is photocatalysis with sunshine is absorbed, being capable of catalytic eliminating volatile organic matter (VOC), antioxidant nitroxide
(NOx) function of Cleaning Air, is played.
The present invention using red mud solid waste for being prepared with the conventional constituents water in photo-catalysis function cement mortar
The specification and consumption of mud, sand and water are not specially required, and those skilled in the art can also be needed from traveling according to actual conditions
Row setting.
The side of the cement mortar of tool light catalytic purifying air is prepared the invention discloses a kind of utilization red mud solid waste
Method, using the Fe in the red mud after the heat treatment added in the cement mortar2O3、TiO2、V2O5The absorption sunshine having is sent out
Third contact of a total solar or lunar eclipse catalytic action, realizes catalysis oxidation VOC and NOx, plays the function of Cleaning Air, and the facade that can be used for building is smeared
The fields such as face, cement pavement, vcehicular tunnel and garage.
The red mud solid waste used in the present invention is the solid waste from aluminium producing, and the application of this method subtracts
Red mud pollution on the environment is lacked, while using Fe therein2O3、TiO2、V2O5Light catalytic purifying atmospheric environment improves big
Makings amount, for the high added value scale application of red mud provides new method, while also having important Social benefit and economic benefit.
In a word, outstanding advantages of the invention are：1. part sand is replaced with red mud in mortar, realize solid waste resource recovery, reaching can
The purpose of sustainable development；2. Fe is contained in mortar2O3、TiO2、V2O5Photochemical catalyst, the function with Cleaning Air environment.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, but institute's protection domain of the present invention is not limited to
This.In addition, it is to be understood that after the content that the present invention tells about has been read, those skilled in the art can make various changes to the present invention
And modification, and the modification of the equivalent form of value equally falls within the application claim limited range.
Embodiment 1
The preparation of graininess red mud
(1) red mud solid waste 100kg is weighed, is sintered 3.5 hours at 550 DEG C；
(2) the red mud solid waste after step (1) is sintered is crushed, and crosses 100 mesh~120 mesh sieves, makes the grain diameter be
0.12mm~0.15mm, that is, obtain graininess red mud.
Embodiment 2
Photo-catalysis function cement mortar is prepared using red mud, it is adaptable to which engineering is wiped one's face construction.
It is raw material to be heat-treated red mud as obtained in the method for embodiment 1, specific material fiting ratio is shown in Table 1.
Catalyst performance evaluation is realized by following device：
Reactor：Closed ventilation shaft, 2 pieces of cement bonded sand lodicules of centre filling, uviol lamp is installed at device top.With formaldehyde,
Benzene, toluene, nitric oxide are simulation gas pollutant, every 30min, inlet and outlet sampled point air sample are gathered respectively,
Test contaminant concentration, averages, and calculates primary purification efficiency of the photochemical catalyst to gas pollutant.
Gas flow rate is 1.00L/min and 2.00L/min, and temperature is room temperature, and air humidity is 50 ± 5%.
The catalytic effect evaluation of photo-catalysis function mortar is shown in Table 7.
Table 1：
Embodiment 3
Photo-catalysis function cement mortar is prepared using red mud, it is adaptable to which engineering is wiped one's face construction.
It is raw material to be heat-treated red mud as obtained in the method for embodiment 1, specific material fiting ratio is shown in Table 2.
Method test in photo-catalysis function mortar such as embodiment 2, catalytic effect evaluation is shown in Table 7.
Table 2：
Embodiment 4
Photo-catalysis function cement mortar is prepared using red mud, it is adaptable to which engineering is wiped one's face construction.
It is raw material to be heat-treated red mud as obtained in the method for embodiment 1, specific material fiting ratio is shown in Table 3.
Method test in photo-catalysis function mortar such as embodiment 2, catalytic effect evaluation is shown in Table 7.
Table 3：
Embodiment 5
Photo-catalysis function cement mortar is prepared using red mud, it is adaptable to engineering spraying application.
It is raw material to be heat-treated red mud as obtained in the method for embodiment 1, specific material fiting ratio is shown in Table 4.
Method test in photo-catalysis function mortar such as embodiment 2, catalytic effect evaluation is shown in Table 7.
Table 4：
Embodiment 6
Photo-catalysis function cement mortar is prepared using red mud, it is adaptable to which engineering is wiped one's face construction.
It is raw material to be heat-treated red mud as obtained in the method for embodiment 1, specific material fiting ratio is shown in Table 5.
Method test in photo-catalysis function mortar such as embodiment 2, catalytic effect evaluation is shown in Table 7.
Table 5：
Embodiment 7
Photo-catalysis function cement mortar is prepared using red mud, it is adaptable to which engineering is wiped one's face construction.
It is raw material to be heat-treated red mud as obtained in the method for embodiment 1, specific material fiting ratio is shown in Table 6.
Method test in photo-catalysis function mortar such as embodiment 2, catalytic effect evaluation is shown in Table 7.
Table 6：
Table 7：The catalysis activity of photo-catalysis function mortar
By result it can be seen that：Consumption with red mud particle in mortar increases, i.e. photochemical catalyst Fe2O3、TiO2、V2O5Contain
Amount increases, and the photocatalysis efficiency of mortar increases.
Claims (5)
1. a kind of utilization red mud solid waste prepares the method with photo-catalysis function cement mortar, is by with Bayer process, burning
The red mud solid waste that connection or combination method are obtained is prepared into graininess red mud, then with cement, sand, polycarboxylate water-reducer
Mixed with water and the cement mortar with photo-catalysis function is obtained；
It is characterized in that：
The preparation process of the graininess red mud is：
(1) red mud solid waste is weighed, is sintered 2~5 hours at 500~600 DEG C；
(2) the red mud solid waste after step (1) is sintered is crushed, and crosses 100 mesh~120 mesh sieves, makes grain diameter be 0.12mm
~0.15mm, that is, obtain graininess red mud；
The mass ratio that the graininess red mud mixes with cement, sand, polycarboxylate water-reducer and water is：200~300:100:100
~500:0.2~0.3:30~50.
2. the method with photo-catalysis function cement mortar is prepared using red mud solid waste as claimed in claim 1, it is special
Levy and be：The temperature of step (1) the sintering red mud solid waste is 550~600 DEG C, and the time is 3~4 hours.
3. the method with photo-catalysis function cement mortar is prepared using red mud solid waste as claimed in claim 2, it is special
Levy and be：The temperature of step (1) the sintering red mud solid waste is 550 DEG C, and the time is 3.5 hours.
4. the method with photo-catalysis function cement mortar is prepared using red mud solid waste as claimed in claim 1, it is special
Levy and be：The mass ratio that the graininess red mud mixes with cement, sand, polycarboxylate water-reducer and water is：250~300:100:
300:0.3:40~45.
5. there is the cement mortar of photo-catalysis function obtained in a kind of claim 1 methods described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611114316.9A CN106746980A (en) | 2016-12-07 | 2016-12-07 | A kind of utilization red mud solid waste prepares the method with photo-catalysis function cement mortar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611114316.9A CN106746980A (en) | 2016-12-07 | 2016-12-07 | A kind of utilization red mud solid waste prepares the method with photo-catalysis function cement mortar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106746980A true CN106746980A (en) | 2017-05-31 |
Family
ID=58874578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611114316.9A Pending CN106746980A (en) | 2016-12-07 | 2016-12-07 | A kind of utilization red mud solid waste prepares the method with photo-catalysis function cement mortar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106746980A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108043404A (en) * | 2017-12-20 | 2018-05-18 | 中国科学院过程工程研究所 | Catalyst of removing volatile organic compounds prepared by a kind of red mud and preparation method thereof |
| CN113663686A (en) * | 2021-07-30 | 2021-11-19 | 昆明理工大学 | Method for preparing photocatalytic material by utilizing lead-zinc tailings and application |
| CN114655972A (en) * | 2022-04-27 | 2022-06-24 | 云南省生态环境科学研究院 | Method for efficiently removing organic matters in alumina solution by Bayer process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102240551A (en) * | 2011-04-21 | 2011-11-16 | 山西开兴赤泥开发有限公司 | Method for preparing visible light photochemical catalyst with high specific surface area by using red mud |
| CN103537298A (en) * | 2013-09-09 | 2014-01-29 | 西安建筑科技大学 | Preparation of red soil-base polymer catalyst and application of catalyst in preparation of hydrogen energy |
| CN103964764A (en) * | 2014-04-04 | 2014-08-06 | 山东交通学院 | Method for preparing cement mortar with NOx photocatalysis degradation function by using steel slag |
-
2016
- 2016-12-07 CN CN201611114316.9A patent/CN106746980A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102240551A (en) * | 2011-04-21 | 2011-11-16 | 山西开兴赤泥开发有限公司 | Method for preparing visible light photochemical catalyst with high specific surface area by using red mud |
| CN103537298A (en) * | 2013-09-09 | 2014-01-29 | 西安建筑科技大学 | Preparation of red soil-base polymer catalyst and application of catalyst in preparation of hydrogen energy |
| CN103964764A (en) * | 2014-04-04 | 2014-08-06 | 山东交通学院 | Method for preparing cement mortar with NOx photocatalysis degradation function by using steel slag |
Non-Patent Citations (4)
| Title |
|---|
| BUSTO, RV ET AL.: "Assessment of the use of red mud as a catalyst for photodegradation of bisphenol A in wastewater treatment", 《WATER SCIENCE AND TECHNOLOGY》 * |
| LAMONIER,JF ET AL.: "recycling of waste, red mud, as a catalyser for the elimination of volatile organic compounds", 《CANADIAN JOURNAL OF CHEMICAL ENGINEERING》 * |
| 刘东燕等: "不同热处理条件下赤泥的新颖应用研究", 《材料导报》 * |
| 郭京育等: "《聚羧酸系高性能减水剂制备、性能与应用技术新进展》", 31 May 2013, 北京理工大学出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108043404A (en) * | 2017-12-20 | 2018-05-18 | 中国科学院过程工程研究所 | Catalyst of removing volatile organic compounds prepared by a kind of red mud and preparation method thereof |
| CN108043404B (en) * | 2017-12-20 | 2021-06-15 | 中国科学院过程工程研究所 | Catalyst prepared from red mud for removing volatile organic compounds and preparation method thereof |
| CN113663686A (en) * | 2021-07-30 | 2021-11-19 | 昆明理工大学 | Method for preparing photocatalytic material by utilizing lead-zinc tailings and application |
| CN114655972A (en) * | 2022-04-27 | 2022-06-24 | 云南省生态环境科学研究院 | Method for efficiently removing organic matters in alumina solution by Bayer process |
| CN114655972B (en) * | 2022-04-27 | 2023-10-27 | 云南省生态环境科学研究院 | Method for efficiently removing organics from Bayer process alumina solution |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Fan et al. | A comparative study on solidification/stabilization characteristics of coal fly ash-based geopolymer and Portland cement on heavy metals in MSWI fly ash | |
| Dunuweera et al. | Cement types, composition, uses and advantages of nanocement, environmental impact on cement production, and possible solutions | |
| Clavier et al. | Opportunities and challenges associated with using municipal waste incineration ash as a raw ingredient in cement production–a review | |
| Zhan et al. | Co-sintering MSWI fly ash with electrolytic manganese residue and coal fly ash for lightweight ceramisite | |
| He et al. | Hazard-free treatment and resource utilisation of electrolytic manganese residue: A review | |
| Rodriguez-Navarro et al. | Role of particulate matter from vehicle exhaust on porous building stones (limestone) sulfation | |
| Fan et al. | A comparative study on characteristics and leaching toxicity of fluidized bed and grate furnace MSWI fly ash | |
| Stajanča et al. | Environmental impacts of cement production | |
| CN111704406A (en) | Application of household garbage incineration fly ash composite admixture in cement stabilized macadam mixture | |
| CN106746980A (en) | A kind of utilization red mud solid waste prepares the method with photo-catalysis function cement mortar | |
| CN100402129C (en) | Method for treating SO2 in coal firing smoke by red mud | |
| Wang et al. | Utilization of fly ash as building material admixture: Basic properties and heavy metal leaching | |
| Negral et al. | Anthropogenic and meteorological influences on PM10 metal/semi-metal concentrations: Implications for human health | |
| Han | Industrial solid waste recycling in western China | |
| WO2019062454A1 (en) | Cementitious material and manufacturing method therefor | |
| Liu et al. | Utilization of waste concrete powder with different particle size as absorbents for SO2 reduction | |
| Wang et al. | Melting solidification and leaching behaviors of V/As during co-combustion of the spent SCR catalyst with coal | |
| CN1895802A (en) | Treatment of aluminum electrolytic cell waste refractory materials | |
| CN114230259A (en) | Fly ash-based soil curing agent and preparation method thereof | |
| CN103101104A (en) | Preparation method for reinforced photocatalysis environment-friendly brick | |
| Ramakrishnan et al. | Reactions of SO2 on hydrated cement particle system for atmospheric pollution reduction: A DRIFTS and XANES study | |
| Franzoni et al. | TiO2 in the building sector | |
| CN106118803B (en) | House refuse low temperature pyrogenation stove Nei bioxin inhibitor and preparation method and application | |
| CN109206028A (en) | A kind of cement rotary kiln efficient sulfur-fixing agent and its application method | |
| Cai et al. | Target the neglected VOCs emission from iron and steel industry in China for air quality improvement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
|
| RJ01 | Rejection of invention patent application after publication |