CN107754799A - A kind of method that ferro-silicon slag prepares medium temperature demercuration catalysis material - Google Patents

A kind of method that ferro-silicon slag prepares medium temperature demercuration catalysis material Download PDF

Info

Publication number
CN107754799A
CN107754799A CN201711183713.6A CN201711183713A CN107754799A CN 107754799 A CN107754799 A CN 107754799A CN 201711183713 A CN201711183713 A CN 201711183713A CN 107754799 A CN107754799 A CN 107754799A
Authority
CN
China
Prior art keywords
demercuration
ferro
silicon slag
catalysis material
medium temperature
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
Application number
CN201711183713.6A
Other languages
Chinese (zh)
Inventor
崔素萍
张艳昭
马晓宇
万业强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing University of Technology
Original Assignee
Beijing University of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing University of Technology filed Critical Beijing University of Technology
Priority to CN201711183713.6A priority Critical patent/CN107754799A/en
Publication of CN107754799A publication Critical patent/CN107754799A/en
Pending legal-status Critical Current

Links

Landscapes

  • Catalysts (AREA)

Abstract

A kind of method that ferro-silicon slag prepares medium temperature demercuration catalysis material belongs to environmentally conscious materialses, environmental catalysis and field of environment protection.Ferro-silicon slag is the waste residue cleared out of during producing ferrosilicon from ladle, and the main component of ferro-silicon slag is：SiO2, CaO, MnO, MgO and Al2O3.The oxide of calcium in ferro-silicon slag, manganese, magnesium, aluminium is dissolved into mixed solution by this method using hydrochloric acid as lytic agent, according to the difference of each metal ion solubility product, pH=7~10 are adjusted as precipitating reagent using sodium hydroxide and produce precipitation, washing centrifugation, the content for reducing impurity element Ca and Mg is formed with SiO2、Al2O3For matrix, MnO is the manganese base demercuration catalysis material of active component.Demercuration catalysis material medium temperature demercuration activity prepared by the method is high, up to more than 90% in the range of 300 DEG C~450 DEG C.The present invention realizes the recycling of ferro-silicon slag, environmental protection, and the medium temperature demercuration catalysis material of preparation brings very big social benefit.

Description

A kind of method that ferro-silicon slag prepares medium temperature demercuration catalysis material
Technical field
The invention belongs to environmental catalysis material and field of environment protection, is specially that one kind is prepared using industrial residue ferro-silicon slag Medium temperature demercuration catalysis material.
Background technology
Mercury pollution is the global environmental problem currently to receive much concern.Manufacture of cement is the most important of global atmosphere mercury emissions One of source.China's cement output occupies the first in the world for years.Government has put into effect relevant policies, revision《Water Mud industrial atmosphere pollutant emission standard》(GB4915-2013) specific requirement, is proposed to the mercury emissions of cement kiln flue gas 0.05mg/m3.The discharge of mercury mainly passes through flue gas in manufacture of cement.The form of mercury in flue gas has gaseous state nonvalent mercury (Hg0), two Valency ionic mercury (Hg2+) and particulate Hg (Hgp) 3 kinds.Tin ja et al. carried out on-the-spot test in 2010 to a cement plant, obtained Nonvalent mercury, bivalent mercury, particulate Hg ratio are 65.7%, 34%, 0.3%.Yang Hai et al. gave birth in the cement to 5000t/d in 2014 Producing line gas mercury is tested, and is obtained the gaseous mercury of floss hole based on nonvalent mercury, is about accounted for more than 80%.
Ferro-silicon slag is the waste residue cleared out of during producing ferrosilicon from ladle, and the main component of ferro-silicon slag is：SiO2、 CaO, MnO, MgO and Al2O3If it can be effectively utilized for example for cement plant flue gas Hg0Removing, then can be to smoke pollution The discharge of thing is controlled, while the cost of demercuration material is greatly reduced.This method can reduce impurity element Ca in ferro-silicon slag Formed with Mg content with SiO2、Al2O3For matrix, MnO is that the manganese base demercuration of active component urges material.Jiangkun Xie etc. People prepares the Mn-TiO of different manganese load capacity using template agent method2Catalyst, Mn-TiO2(10%) demercuration efficiency reaches at 300 DEG C To 90%.Anchao Zhang prepare cobalt and manganese oxide modifying titanium dioxide (CoxMnyTi) catalyst using deposition-precipitation. As a result show in Mn30Ti, with 6%Co optimum load amount, Hg0Oxidation efficiency can reach 98% or so at 150 DEG C. MnOx (20%)-CeOx (10%)/SiO that Kuan-Hung Liu et al. are prepared using coprecipitation2Catalyst, at 150 DEG C Demercuration efficiency reaches 96%.
Mn prepared by this methodxOy/SiO2-Al2O3The demercuration reaction of demercuration material follows Mars-Maessen mechanism：
Hg〔g)+MnxOy→Hg-O≡MnxOy-1 〔1)
Hg-O≡MnxOy-1→HgO+MnxOy-1 (2)
MnxOy-1+1/2O2→MnxOy (3)
Hg〔g)+2CuO→Hg-O≡Cu2O 〔4)
Hg-O≡Cu2O→HgO+Cu2O 〔5)
Cu2O+1/2O2→2CuO 〔6)
O ≡ represent the surface chemistry oxygen in catalyst in formula.
The content of the invention
It is the method that raw material prepares medium temperature demercuration catalyst it is an object of the invention to provide a kind of ferro-silicon slag.
A kind of method that ferro-silicon slag prepares medium temperature demercuration catalysis material, it is characterised in that：By ferro-silicon slag powder under 100 mesh sieves Hydrochloric acid solution with 2.0~3.0mol/L is with solid-to-liquid ratio=1 gram：9 milliliters of ratio mixing, 2h, which is stirred at room temperature, becomes it Mixed solution；Precipitating reagent is added, regulation mixed solution pH=7~10, continues to stir 30min；Deionized water centrifuges three times, separation Go out bottom precipitation；105 DEG C of dry 24h, 300 DEG C of calcining 4h, are made catalysis material powder.
Further, one kind in precipitating reagent selection sodium hydroxide solution, ammonia spirit, sodium carbonate liquor.
A kind of method that ferro-silicon slag prepares medium temperature demercuration catalysis material, it is characterised in that：By ferro-silicon slag powder under 100 mesh sieves Hydrochloric acid solution with 2.0mol/L is with solid-to-liquid ratio=1 gram：9 milliliters of ratio mixing, is stirred at room temperature 2h；Add copper nitrate, The mass ratio for adding copper nitrate and ferro-silicon slag is 0.25~1.0, stirs 30min, adds NaOH solution regulation pH value of solution=9, after Continuous stirring 30min；Deionized water centrifuges three times, isolates bottom precipitation；105 DEG C of dry 24h, 300 DEG C of calcining 4h, are made catalysis Material powder.
Demercuration efficiency of the present invention is in fixed reaction bed test.Simulated flue gas forms：60ug/m3Hg0, 6%O2, 12% CO2, N2For Balance Air.Catalysis material is granulated first, takes particle of the granularity between the mesh of 40 mesh~60 to be tested, claims Take 0.2000g catalyst to carry out demercuration performance test, test the demercuration efficiency of catalysis material under 100 DEG C~500 DEG C temperature conditionss, The demercuration efficiency of catalysis material prepared by the present invention reaches as high as 96.2%.
Brief description of the drawings
Fig. 1 difference concentration of hydrochloric acid prepares catalysis material demercuration curve
Fig. 2 differences pH prepares catalysis material demercuration curve
Fig. 3 difference precipitating reagents prepare catalysis material demercuration curve
Fig. 4 different Cu load capacity prepares catalysis material demercuration curve
Embodiment
Case study on implementation one：
By ferro-silicon slag powder and 2.0mol/L hydrochloric acid solution under 100 mesh sieves with solid-to-liquid ratio=1 gram：9 milliliters of ratio is mixed Close, 2h, which is stirred at room temperature, makes it become mixed solution；2h, which is stirred at room temperature, makes it become mixed solution, adds 2.0mol/L NaOH solution adjust to pH=9.00, continue stir 30min；Deionized water centrifuges three times, isolates bottom precipitation；105℃ 24h is dried, 300 DEG C of calcining 4h, catalysis material powder is made.
Demercuration rate is tested：Simulated flue gas composition 60ug/m3Hg0, 6%O2, 12%CO2, N2For Balance Air, 100 DEG C~500 Demercuration efficiency test is carried out within the temperature range of DEG C.95.2% is reached as high as in 350 DEG C of demercuration rates.
Case study on implementation two：
By ferro-silicon slag powder and 3.0mol/L hydrochloric acid solution under 100 mesh sieves with solid-to-liquid ratio=1 gram：9 milliliters of ratio is mixed Close, 2h, which is stirred at room temperature, makes it become mixed solution, and the NaOH solution for adding 2.0mol/L is adjusted to pH=9.00, continues to stir Mix 30min；Deionized water centrifuges three times, isolates bottom precipitation；105 DEG C of dry 24h, 300 DEG C of calcining 4h, are made catalysis material Powder.
Demercuration rate is tested：Simulated flue gas composition 60ug/m3Hg0, 6%O2, 12%CO2, N2For Balance Air, 100 DEG C~500 Demercuration efficiency test is carried out within the temperature range of DEG C.84.2% is reached as high as in 350 DEG C of demercuration rates.
Case study on implementation three：
By ferro-silicon slag powder and 2.0mol/L hydrochloric acid solution under 100 mesh sieves with solid-to-liquid ratio=1 gram：9 milliliters of ratio is mixed Close, 2h, which is stirred at room temperature, makes it become mixed solution, and the NaOH solution for adding 2.0mol/L is adjusted to pH=7.00, continues to stir Mix 30min；Deionized water centrifuges three times, isolates bottom precipitation；105 DEG C of dry 24h, 300 DEG C of calcining 4h, are made catalysis material Powder.
Demercuration rate is tested：Simulated flue gas composition 60ug/m3Hg0, 6%O2, 12%CO2, N2For Balance Air, 100 DEG C~500 Demercuration efficiency test is carried out within the temperature range of DEG C.89.9% is reached as high as in 350 DEG C of demercuration rates.
Case study on implementation four：
By ferro-silicon slag powder and 2.0mol/L hydrochloric acid solution under 100 mesh sieves with solid-to-liquid ratio=1 gram：9 milliliters of ratio is mixed Close, 2h, which is stirred at room temperature, makes it become mixed solution, and the NaOH solution for adding 2.0mol/L is adjusted to pH=8.00, continues to stir Mix 30min；Deionized water centrifuges three times, isolates bottom precipitation；105 DEG C of dry 24h, 300 DEG C of calcining 4h, are made catalysis material Powder.
Demercuration rate is tested：Simulated flue gas composition 60ug/m3Hg0, 6%O2, 12%CO2, N2For Balance Air, 100 DEG C~500 Demercuration efficiency test is carried out within the temperature range of DEG C.77.1% is reached as high as in 350 DEG C of demercuration rates.
Case study on implementation five：
By ferro-silicon slag powder and 2.0mol/L hydrochloric acid solution under 100 mesh sieves with solid-to-liquid ratio=1 gram：9 milliliters of ratio is mixed Close, 2h, which is stirred at room temperature, makes it become mixed solution, and the NaOH solution for adding 2.0mol/L is adjusted to pH=10.00, is continued Stir 30min；Deionized water centrifuges three times, isolates bottom precipitation；105 DEG C of dry 24h, 300 DEG C of calcining 4h, are made catalysis material Feed powder end.
Demercuration rate is tested：Simulated flue gas composition 60ug/m3Hg0, 6%O2, 12%CO2, N2For Balance Air, 100 DEG C~500 Demercuration efficiency test is carried out within the temperature range of DEG C.75.2% is reached as high as in 350 DEG C of demercuration rates.
Case study on implementation six：
By ferro-silicon slag powder and 2.0mol/L hydrochloric acid solution under 100 mesh sieves with solid-to-liquid ratio=1 gram：9 milliliters of ratio is mixed Close, 2h, which is stirred at room temperature, makes it become mixed solution, adds and analyzes pure Na2CO3Particle is adjusted to pH=9.00, continues to stir 30min；Deionized water centrifuges three times, isolates bottom precipitation；105 DEG C of dry 24h, 300 DEG C of calcining 4h, are made catalysis material powder End.
Demercuration rate is tested：Simulated flue gas composition 60ug/m3, 6%O2, 12%CO2, N2For Balance Air, at 100 DEG C~500 DEG C Within the temperature range of carry out demercuration efficiency test.88.9% is reached as high as in 350 DEG C of demercuration rates.
Case study on implementation seven：
By ferro-silicon slag powder and 2.0mol/L hydrochloric acid solution under 100 mesh sieves with solid-to-liquid ratio=1 gram：9 milliliters of ratio is mixed Close, 2h, which is stirred at room temperature, makes it become mixed solution, adds ammonia spirit and adjusts to pH=9.00, continues to stir 30min；Go Ionized water centrifuges three times, isolates bottom precipitation；105 DEG C of dry 24h, 300 DEG C of calcining 4h, are made catalysis material powder.
Demercuration rate is tested：Simulated flue gas composition 60ug/m3, 6%O2, 12%CO2, N2For Balance Air, at 100 DEG C~500 DEG C Within the temperature range of carry out demercuration efficiency test.93.1% is reached as high as in 350 DEG C of demercuration rates.
Case study on implementation eight：
By ferro-silicon slag powder and 2.0mol/L hydrochloric acid solution under 100 mesh sieves with solid-to-liquid ratio=1 gram：9 milliliters of ratio is mixed Close, 2h, which is stirred at room temperature, makes it become mixed solution, adds 3.1537g copper nitrates, continues to stir 0.5h, adds 2.0mol/L NaOH solution adjust to pH=9.00, continue stir 30min；Deionized water centrifuges three times, isolates bottom precipitation；105℃ 24h is dried, 300 DEG C of calcining 4h, catalysis material powder is made.
Demercuration rate is tested：Simulated flue gas composition 60ug/m3Hg0, 6%O2, 12%CO2, N2For Balance Air, 100 DEG C~500 Demercuration efficiency test is carried out within the temperature range of DEG C.92.1% is reached as high as in 350 DEG C of demercuration rates.
Case study on implementation nine：
By ferro-silicon slag powder and 2.0mol/L hydrochloric acid solution under 100 mesh sieves with solid-to-liquid ratio=1 gram：9 milliliters of ratio is mixed Close, 2h, which is stirred at room temperature, makes it become mixed solution, adds 6.1537g copper nitrates, continues to stir 0.5h, adds 2.0mol/L NaOH solution adjust to pH=9.00, continue stir 30min；Deionized water centrifuges three times, isolates bottom precipitation；105℃ 24h is dried, 300 DEG C of calcining 4h, catalysis material powder is made.
Demercuration rate is tested：Simulated flue gas composition 60ug/m3Hg0, 6%O2, 12%CO2, N2For Balance Air, 100 DEG C~500 Demercuration efficiency test is carried out within the temperature range of DEG C.96.2% is reached as high as in 350 DEG C of demercuration rates.
Case study on implementation ten：
By ferro-silicon slag powder and 2.0mol/L hydrochloric acid solution under 100 mesh sieves with solid-to-liquid ratio=1 gram：9 milliliters of ratio is mixed Close, 2h, which is stirred at room temperature, makes it become mixed solution, adds 9.1537g copper nitrates, continues to stir 0.5h, adds 2.0mol/L NaOH solution adjust to pH=9.00, continue stir 30min；Deionized water centrifuges three times, isolates bottom precipitation；105℃ 24h is dried, 300 DEG C of calcining 4h, catalysis material powder is made.
Demercuration rate is tested：Simulated flue gas composition 60ug/m3Hg0, 6%O2, 12%CO2, N2For Balance Air, 100 DEG C~500 Demercuration efficiency test is carried out within the temperature range of DEG C.92.9% is reached as high as in 350 DEG C of demercuration rates.
Case study on implementation 11：
By ferro-silicon slag powder and 2.0mol/L hydrochloric acid solution under 100 mesh sieves with solid-to-liquid ratio=1 gram：9 milliliters of ratio is mixed Close, 2h, which is stirred at room temperature, makes it become mixed solution, adds 10.1537g copper nitrates, continues to stir 0.5h, adds 2.0mol/ L NaOH solution is adjusted to pH=9.00, continues to stir 30min；Deionized water centrifuges three times, isolates bottom precipitation；105℃ 24h is dried, 300 DEG C of calcining 4h, catalysis material powder is made.
Demercuration rate is tested：Simulated flue gas composition 60ug/m3Hg0, 6%O2, 12%CO2, N2For Balance Air, 100 DEG C~500 Demercuration efficiency test is carried out within the temperature range of DEG C.89.4% is reached as high as in 350 DEG C of demercuration rates.

Claims (3)

1. a kind of method that ferro-silicon slag prepares medium temperature demercuration catalysis material, it is characterised in that：By ferro-silicon slag powder under 100 mesh sieves with 2.0~3.0mol/L hydrochloric acid solution is with solid-to-liquid ratio=1 gram：9 milliliters of ratio mixing, 2h, which is stirred at room temperature, makes it become mixed Close solution；Precipitating reagent is added, regulation mixed solution pH=7~10, continues to stir 30min；Deionized water centrifuges three times, isolates Bottom precipitation；105 DEG C of dry 24h, 300 DEG C of calcining 4h, are made catalysis material powder.
2. the method that a kind of ferro-silicon slag according to claim 1 prepares medium temperature demercuration catalysis material, it is characterised in that：Precipitation One kind in agent selection sodium hydroxide solution, ammonia spirit, sodium carbonate liquor.
3. a kind of method that ferro-silicon slag prepares medium temperature demercuration catalysis material, it is characterised in that：By ferro-silicon slag powder under 100 mesh sieves with 2.0mol/L hydrochloric acid solution is with solid-to-liquid ratio=1 gram：9 milliliters of ratio mixing, is stirred at room temperature 2h；Copper nitrate is added, is added It is 0.25~1.0 to add the mass ratio of copper nitrate and ferro-silicon slag, stirs 30min, adds NaOH solution regulation pH value of solution=9, continues Stir 30min；Deionized water centrifuges three times, isolates bottom precipitation；105 DEG C of dry 24h, 300 DEG C of calcining 4h, are made catalysis material Feed powder end.
CN201711183713.6A 2017-11-23 2017-11-23 A kind of method that ferro-silicon slag prepares medium temperature demercuration catalysis material Pending CN107754799A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711183713.6A CN107754799A (en) 2017-11-23 2017-11-23 A kind of method that ferro-silicon slag prepares medium temperature demercuration catalysis material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711183713.6A CN107754799A (en) 2017-11-23 2017-11-23 A kind of method that ferro-silicon slag prepares medium temperature demercuration catalysis material

Publications (1)

Publication Number Publication Date
CN107754799A true CN107754799A (en) 2018-03-06

Family

ID=61275284

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711183713.6A Pending CN107754799A (en) 2017-11-23 2017-11-23 A kind of method that ferro-silicon slag prepares medium temperature demercuration catalysis material

Country Status (1)

Country Link
CN (1) CN107754799A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109621944A (en) * 2018-11-28 2019-04-16 上海大学 The method for preparing integral catalyzer using waste sill
CN111001376A (en) * 2019-12-30 2020-04-14 北京工业大学 SiO for efficiently adsorbing copper ions2-Al2O3Preparation method of-CaO-MgO quaternary system adsorbent

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102580743A (en) * 2011-12-30 2012-07-18 浙江大学 Method for preparing oxidation catalyst from gold ore tailing slag, and prepared oxidation catalyst and application thereof
CN104001501A (en) * 2014-05-27 2014-08-27 北京工业大学 Method for preparing denitration catalytic material by using acidolysis residues
CN104549356A (en) * 2015-01-25 2015-04-29 北京工业大学 Method for preparing low-temperature denitrification catalytic material from acidolysis residues
CN105944662A (en) * 2016-05-15 2016-09-21 清华大学 Catalytic adsorbent for demercuration and denitration of flue gas in coal-fired power plant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102580743A (en) * 2011-12-30 2012-07-18 浙江大学 Method for preparing oxidation catalyst from gold ore tailing slag, and prepared oxidation catalyst and application thereof
CN104001501A (en) * 2014-05-27 2014-08-27 北京工业大学 Method for preparing denitration catalytic material by using acidolysis residues
CN104549356A (en) * 2015-01-25 2015-04-29 北京工业大学 Method for preparing low-temperature denitrification catalytic material from acidolysis residues
CN105944662A (en) * 2016-05-15 2016-09-21 清华大学 Catalytic adsorbent for demercuration and denitration of flue gas in coal-fired power plant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109621944A (en) * 2018-11-28 2019-04-16 上海大学 The method for preparing integral catalyzer using waste sill
CN109621944B (en) * 2018-11-28 2021-12-03 上海大学 Method for preparing monolithic catalysts using waste-based materials
CN111001376A (en) * 2019-12-30 2020-04-14 北京工业大学 SiO for efficiently adsorbing copper ions2-Al2O3Preparation method of-CaO-MgO quaternary system adsorbent
CN111001376B (en) * 2019-12-30 2022-05-17 北京工业大学 SiO for efficiently adsorbing copper ions2-Al2O3Preparation method of-CaO-MgO quaternary system adsorbent

Similar Documents

Publication Publication Date Title
CN105779074B (en) A kind of cement kiln calcium base catalytic desulfurizing agent
CN111093828A (en) Desulfurization catalyst, method for producing desulfurization catalyst, and desulfurization method using desulfurization catalyst
CN102703159A (en) Coal-economizing sulfur-solidifying and denitrification additive for coal
CN104492372A (en) Preparation method and application of material for adsorbing heavy metals in wastewater
CN106244288A (en) Coal clean combustion co-combustion agent and application process thereof
CN107754799A (en) A kind of method that ferro-silicon slag prepares medium temperature demercuration catalysis material
Jia et al. A new strategy for the reuse of typical hazardous solid waste electric arc furnace dust (EAFD): Efficient desulfurization by EAFD slurry
CN105621909B (en) It is a kind of to mix modified Desulphurization and the cement of rice hull ash again
CN104927969A (en) Nano-composite environment-friendly coal saving agent
Luo et al. Research on indirect carbonation of two-step leaching for the purpose of utilizing the alkalinity of steel slag
CN113683108A (en) Method for preparing calcium aluminate product by using secondary aluminum ash
US20210331974A1 (en) METHOD FOR PREPARING A CEMENTING MATERIAL USING SMELTING INDUSTRIAL WASTE SLAG AFTER UTILIZING THE SIMULTANEOUS REMOVAL OF SO2 AND NOx IN FLUE GAS AND APPLICATION OF THE CEMENTING MATERIAL OBTAINED BY THE SAME
CN111001376B (en) SiO for efficiently adsorbing copper ions2-Al2O3Preparation method of-CaO-MgO quaternary system adsorbent
CN111450835A (en) White carbon black core-shell structure catalyst and preparation method and application thereof
TW201838917A (en) Method for separating calcium sulfate and calcium carbonate from desulfurized gypsum waste generated in flue gas desulfurization process with which the purities of the separated calcium sulfate and calcium carbonate are 90% and 100%, respectively
CN114890448A (en) Resource treatment method of desulfurized gypsum
CN109517994B (en) Method for purifying mangano-manganic oxide from manganese steel plant smoke dust and product
CN114574262B (en) Coal-fired catalyst produced by using titanium white waste acid and preparation method thereof
CN105368536A (en) Ferrocene-containing fuel coal synergist and preparation method therefor
CN105921002B (en) A kind of semi-dry desulfurizing process calcium-based desulfurizing agent and preparation method thereof
CN105771599A (en) Desulfurizer for flue of novel dry-method cement production line and preparing method thereof
CN102453584B (en) Furnace calcification desulphurization mineral powder material
CN110201525A (en) A method of sulfur-containing smoke gas desulfurization is carried out using alkaline scrap material
CN104923155A (en) Desulfurizer adsorbent and preparation method thereof
CN110203995A (en) A kind of thallium pollution deeply-curing agent and the preparation method and application thereof

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