CN107640953A - The method for producing binder materials - Google Patents
The method for producing binder materials Download PDFInfo
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- CN107640953A CN107640953A CN201710939772.5A CN201710939772A CN107640953A CN 107640953 A CN107640953 A CN 107640953A CN 201710939772 A CN201710939772 A CN 201710939772A CN 107640953 A CN107640953 A CN 107640953A
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- carbide slag
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- 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
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- Processing Of Solid Wastes (AREA)
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a kind of method of binder materials, comprise the following steps：(1) dry desulfurization denitration is carried out to flue gas using calcium carbide slag treating agent, so as to form the desciccate of containing sulfate and nitrate；The calcium carbide slag treating agent includes 65~95 parts by weight carbide slags, 5~30 parts by weight magnesia and 1~6 part by weight of catalyst；Wherein, described catalyst is selected from TiO2、Al(OH)3、V2O5、WO3、K2O, binuclear phthalocyanine ferro-cobalt (II) or CaSiO3In one or more, described calcium carbide slag treating agent do not contain calcium oxide；(2) gross weight based on binder materials, the industrial solid wastes of 40~70wt% desciccate and 30~60wt% is mixed to form mixture, the mixture is ground to obtain the binder materials.The present invention obtains the good binder materials of combination property using industrial solid wastes and flue gas desulfurization and denitrification accessory substance.
Description
Technical field
The present invention relates to a kind of method for producing binder materials, especially a kind of flue gas desulfurization and denitrification based on carbide slag,
The method of solid waste collaboration Processing tecchnics production binder materials.
Background technology
Carbide slag is that calcium carbide prepares the solid slag using calcium hydroxide as main component obtained after acetylene, while is also contained
The impurity such as silica, aluminum oxide and a small amount of calcium carbonate, di-iron trioxide, magnesia, carbon slag.Carbide slag not only land occupation,
And pollution environment.Main component in carbide slag is calcium hydroxide, in theory by removing the silicon in carbide slag, iron, aluminium, magnesium
Deng objectionable impurities, carry out purification processes and obtain pure calcium hydroxide.
Carbide slag is powder granule.Research shows, calcium hydroxide content the subtracting with carbide slag grain graininess in carbide slag
It is small and increase, therefore calcium hydroxide can be purified according to grading, but include impurity component simultaneously in larger particles, letter
Single ground is classified the impurity component that can not effectively remove in carbide slag to carbide slag, while substantial amounts of carbide slag be present and waste.
For example, the Chinese patent application of Application No. 201210152846.8 discloses a kind of carbide slag recoverying and utilizing method.This method
Using carbide slag as carbide raw material, not screened and removal of impurities processing.Contain the major impurities such as iron, silicon, aluminium, magnesium in carbide slag,
Impurity content handles without removal of impurities up to 20%, can have a strong impact on calcium carbide product quality, calcium carbide product purity is declined to a great extent.
On the one hand, how using the calcareous resource in carbide slag, pollution of the carbide slag to environment is avoided, lime stone is reduced and opens
The destruction to environment is adopted, while reduces dependence of the cement industry to flyash, overcomes shortcoming and deficiency of the prior art, is badly in need of
A kind of economical and practical method that building materials raw material is produced using carbide slag, so as to realize that the resource recycling of carbide slag utilizes.
On the other hand, existing carbide slag desulfurization belongs to wet desulfurizing process mostly, easily produces a large amount of industrial wastes.Example
Such as, CN101642674B discloses a kind of wet fuel gas desulfurizing technology of carbide slag pretreatment, and desulfurization is used as using carbide slag slurry
Agent carries out wet desulphurization processing to flue gas, and catalyst is added in carbide slag slurry, and blasts air and carry out oxidation reaction, oxidation
Reacted carbide slag slurry is re-used as desulfurizing agent and carries out smoke-gas wet desulfurization processing.
The content of the invention
It is an object of the invention to provide a kind of production method of binder materials, and it can realize that the recycling of carbide slag is followed
Ring utilizes.According to further aim of the present invention, it can reduce energy consumption, so as to save production cost.
The purpose of the present invention is realized by following technical solution.
The present invention provides a kind of method of binder materials, comprises the following steps：
(1) dry desulfurization denitration is carried out to flue gas using calcium carbide slag treating agent, so as to form containing sulfate and nitrate
Desciccate；The calcium carbide slag treating agent includes 65~95 parts by weight carbide slags, 5~30 parts by weight magnesia and 1~6 parts by weight
Catalyst；Wherein, described catalyst is selected from TiO2、Al(OH)3、V2O5、WO3、K2O, binuclear phthalocyanine ferro-cobalt (II) or CaSiO3
In one or more, described calcium carbide slag treating agent do not contain calcium oxide；
(2) gross weight based on binder materials, by the industry of 40~70wt% desciccate and 30~60wt%
Solid waste is mixed to form mixture, and the mixture is ground to obtain the binder materials.
Method in accordance with the invention it is preferred that in step (1), described carbide slag is electricity caused by dry acetylene generation process
The polished obtained granularity of rock ballast product is less than the finished product of 200 mesh；Described magnesia is the powder that granularity is less than 100 mesh,
Its active oxidation content of magnesium is more than 70wt%.
Method in accordance with the invention it is preferred that in step (1), the calcium carbide slag treating agent is composed of the following components：
1) 92 parts by weight carbide slag, 5 parts by weight magnesia and 3 parts by weight of titanium dioxide；Or
2) 87.6 parts by weight carbide slag, 10 parts by weight magnesia and 2.4 parts by weight aluminium hydroxides；Or
3) 83 parts by weight carbide slag, 15 parts by weight magnesia and 2 parts by weight vanadic anhydrides.
Method in accordance with the invention it is preferred that in step (1), described calcium carbide slag treating agent is dry powder-shaped.
Method in accordance with the invention it is preferred that in the dry desulfurization denitrification process of step (1), the dioxy of the flue gas
Change sulfur content is 380~680mg/Nm3, amount of nitrogen oxides be 380~500mg/Nm3, oxygen content be 15~20vol%, stream
Speed is 125~145 DEG C for 3~5m/s and temperature.
Method in accordance with the invention it is preferred that in step (2), the gross weight based on binder materials, the desciccate
Dosage is 55~65wt%, and the dosage of the industrial solid wastes is 35~45wt%.
Method in accordance with the invention it is preferred that in step (2), the industrial solid wastes are selected from grain slag, slag, fine coal
One or more in ash, building waste powder.
Method in accordance with the invention it is preferred that in step (2), the granularity of the desciccate is 30~70 mesh and aqueous
Rate is less than or equal to 1%；The granularity of the industrial solid wastes is 30~70 mesh.
It is described to be ground in material ball ratio be 1 method in accordance with the invention it is preferred that in step (2):9~11 condition
60~180min of lower controlled lapping.
Method in accordance with the invention it is preferred that in step (2), the industrial solid wastes are selected from one kind of following combination：
(1) weight proportion is 1:2~3 grain slag and flyash；
(2) weight proportion is 1:2~3 slag and grain slag；
(3) weight proportion is 1:2~3 slag and building waste powder.
The method of the present invention makes full use of the characteristic of carbide slag, uses it for flue gas desulfurization and denitrification, gained containing sulfate and
The desciccate of nitrate mixes with industrial solid wastes, and then forms binder materials.The method of the present invention is largely real
Recycling for carbide slag is showed.According to currently preferred technical scheme, using unburned handling process, energy consumption can be reduced,
Save production cost.The method of the present invention realizes the sorting to grain diameter in grinding, avoids a large amount of fine graineds from sweeping along lower right
The defects of coarse grained levigate efficiency is low.
Embodiment
With reference to specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to
This.
Binder materials, also known as " cementitious matter ", refer to after physics, chemical action, firm Shi Zhuanti can be become from slurry
Material.Binder materials can be with other cementing shots or the material of bulk, so as to as the overall material with certain mechanical strength
Material.Binder materials includes hydraulic cementing materials and on-hydraulic binder materials.The production method bag of the binder materials of the present invention
Include following steps：(1) flue gas desulfurization and denitrification step；(2) mixed grinding step.Introduce in detail below.
<Flue gas desulfurization and denitrification step>
The flue gas desulfurization and denitrification step of the present invention is to carry out dry desulfurization denitration to flue gas using calcium carbide slag treating agent, so as to
Form the desciccate of containing sulfate and nitrate.The present invention calcium carbide slag treating agent include 65~95 parts by weight carbide slags, 5~
30 parts by weight magnesia and 1~6 part by weight of catalyst；Wherein, described catalyst is selected from TiO2、Al(OH)3、V2O5、WO3、
K2O, binuclear phthalocyanine ferro-cobalt (II) or CaSiO3In one or more, and described calcium carbide slag treating agent does not contain calcium oxide.
For the calcium carbide slag treating agent of the present invention using carbide slag as major ingredient, magnesia is auxiliary material, and adds suitable catalyst.This
Sample can make it that the function of carbide slag is given full play to, and have desulfurization and denitration function concurrently, and can reduce unit removing amount
Under carbide slag dosage.Carbide slag dosage under so-called unit removing amount represents to remove the carbide slag required for same amount of flue gas
Weight.The calcium carbide slag treating agent of the present invention does not contain calcium oxide.Taken off it is a discovery of the invention that calcium oxide can not significantly reduce unit
Except the carbide slag dosage under amount.
The calcium carbide slag treating agent of the present invention can be dry powder-shaped.So directly calcium carbide slag treating agent can be mixed with flue gas
Close, and then SO is carried out to flue gas2And NOXRemoving.For example, by the flue gas after desulfurization denitrification agent dry powder and pre- dedusting in fume pipe
Road is sufficiently mixed, and subsequently into absorption tower progress desulphurization denitration processing, the flue gas after desulphurization denitration is discharged by chimney.The present invention's
Calcium carbide slag treating agent can use conventional method to prepare.Such as carbide slag, magnesia and catalyst are well mixed and produced
Product.
The calcium carbide slag treating agent of the present invention can include following component：Carbide slag, magnesia and catalyst.The use of carbide slag
Measure as 65~95 parts by weight, preferably 80~92 parts by weight, more preferably 83~86 parts by weight.The dosage of magnesia is 5~30
Parts by weight, preferably 5~15 parts by weight, more preferably 10~15 parts by weight.The dosage of catalyst is 1~6 parts by weight, is preferably
2~3 parts by weight, more preferably 2~2.5 parts by weight.The dosage of said components is controlled in above range, can be improved identical
Desulfurized effect and denitration effect under the calcium carbide slag treating agent of dosage.
In the present invention, carbide slag is industrial waste；Preferably carbide slag product is ground caused by dry acetylene generation process
The granularity obtained afterwards is less than the finished product of 200 mesh.The granularity of carbide slag can be less than 200 mesh, preferably smaller than 250 mesh, more preferably small
In 300 mesh.Using above-mentioned carbide slag, be advantageous to improve desulfurization off sulfide effect.
In the present invention, magnesia can be the powder of powder, preferably smaller than 150 mesh that granularity is less than 100 mesh.The present invention
Magnesia in, active oxidation content of magnesium can be more than 70wt%, preferably 70wt%~85wt%, more preferably 80wt%~
85wt%.Using above-mentioned magnesia, be advantageous to improve desulfurization off sulfide effect.
In the present invention, catalyst can be selected from TiO2、Al(OH)3、V2O5、WO3、K2O, binuclear phthalocyanine ferro-cobalt (II) or
CaSiO3In one or more.Preferably, described catalyst is selected from TiO2、Al(OH)3、V2O5In one or more.More
Preferably, described catalyst is TiO2、Al(OH)3Or V2O5.According to an embodiment of the invention, described catalyst
For Al (OH)3Or V2O5。V2O5It is most preferred.
According to the specific embodiment of the present invention, the calcium carbide slag treating agent is composed of the following components：92 parts by weight
Carbide slag, 5 parts by weight magnesia and 3 parts by weight of titanium dioxide.According to the another embodiment of the present invention, the calcium carbide
Slag treating agent 87.6 parts by weight carbide slag composed of the following components, 10 parts by weight magnesia and 2.4 parts by weight aluminium hydroxides.According to
Another embodiment of the present invention, the calcium carbide slag treating agent are composed of the following components：83 parts by weight carbide slags, 15 weights
Measure part magnesia and 2 parts by weight vanadic anhydrides.It is a discovery of the invention that the calcium carbide slag treating agent of said components and dosage can be with
Preferably improve desulfurization off sulfide effect, and reduce the carbide slag dosage under unit removing amount.
Dry flue gas desulphurization denitration is carried out using above-mentioned calcium carbide slag treating agent., will according to an embodiment of the invention
Desulfurization denitrification agent dry powder is sufficiently mixed with flue gas in flue, carries out desulphurization denitration processing subsequently into absorption tower, desulfurization takes off
Flue gas after nitre is discharged by chimney.In the dry desulfurization denitrification process of step (1), the content of sulfur dioxide of the flue gas can be with
For 380~680mg/Nm3, amount of nitrogen oxides can be 380~500mg/Nm3, oxygen content can be 15~20vol%, stream
Speed can be able to be 125~145 DEG C for 3~5m/s and temperature.Preferably, the content of sulfur dioxide of the flue gas can be 500
~650mg/Nm3, amount of nitrogen oxides can be 380~450mg/Nm3, oxygen content can be that 15~18vol%, flow velocity can
Think that 3.5~3.8m/s and temperature can be 130~135 DEG C.Above-mentioned Gas Parameters represent the parameter at smoke inlet；Cigarette
The parameter of gas outlet is depending on practical sulphur removal denitration situation.Using above-mentioned technological parameter, be advantageous to obtain steady quality
The desciccate of containing sulfate and nitrate, so as to be advantageous to the production of binder materials.
<Mixed grinding step>
The present invention mixed grinding step be：Gross weight based on binder materials, by 40~70wt% desciccate with
30~60wt% industrial solid wastes are mixed to form mixture, and the mixture is ground to obtain the binder materials.According to this
One embodiment of invention, the gross weight based on binder materials, the dosage of the desciccate are 55~65wt%, the work
The dosage of industry solid waste is 35~45wt%.Above-mentioned raw materials are controlled in above range, binder materials can be fully ensured that
Combination property is good.
In the present invention, industrial solid wastes can selected from one kind in grain slag, slag, flyash, building waste powder or
It is a variety of；The preferably combination of the combination of the combination of grain slag and flyash, grain slag and slag or slag and building waste powder.Root
According to an embodiment of the invention, the industrial solid wastes are selected from one kind of following combination：(1) weight proportion is 1:2~3
Grain slag and flyash；(2) weight proportion is 1:2~3 slag and grain slag；(3) weight proportion is 1:2~3 slag and build
Building refuse powder.
Flyash is the fine ash that catching is got off from the flue gas after coal combustion, and flyash is the main solid of coal-burning power plant's discharge
Body waste.Slag is the slag of steel-making discharge, is divided into vessel slag, open hearth slag, electroslag according to the type of furnace.Grain slag is the height molten condition
Clinker, which is placed in water, rapidly to be cooled down and is formed, thus is different from slag.Building waste powder is using building waste as raw material, is crushed
The solid waste formed.
It can also include additive in the binder materials of the present invention.The additive can be in fire retardant or waterproofing agent
It is one or more.The example of fire retardant includes hibbsite (aluminium hydroxide).The example of waterproofing agent includes but is not limited to carbon
Sour calcium, talcum powder and lime.
In the step (2) of the present invention, the granularity of desciccate can be 30~70 mesh and moisture content is less than or equal to
1wt%.The desciccate of the particle size range can be obtained by the way of screening.The granularity of industrial solid wastes can be 30~
70 mesh.The industrial solid wastes of the particle size range can be obtained by the way of grinding.For example, it is 1 in material ball ratio:9~11
Under the conditions of 30~60min of controlled lapping.
The present invention step (2) in, by mixture material ball ratio be 1:Controlled lapping 60 under conditions of 9~11~
180min, preferably 80~100min, so as to obtain binder materials.Using above-mentioned condition, the synthesis of binder materials can be improved
Performance.
" part " in following preparation example and embodiment represents parts by weight, unless specifically stated otherwise.
The performance of the binder materials of following examples is measured using GB/T50448-2008.Wherein, density and water suction
Rate is 28d test result.
Preparation example 1
The calcium carbide slag treating agent is made up of 5 parts by weight magnesia, 3 part by weight of catalyst and 92 parts by weight carbide slags.Oxidation
The activated magnesia of magnesium is more than 70wt%, granularity is less than the powder of 100 mesh, catalyst TiO2, carbide slag is drying acetylene work
The polished obtained granularity of carbide slag product caused by skill is less than the finished product of 200 mesh.Carbide slag, magnesia and catalyst mixing
Calcium carbide slag treating agent is obtained after uniformly.
Preparation example 2
The calcium carbide slag treating agent is made up of 10 parts by weight magnesia, 2.4 part by weight of catalyst and 87.6 parts by weight carbide slags.
The activated magnesia of magnesia is more than 75wt%, granularity is less than the powder of 100 mesh, and catalyst is Al (OH)3, carbide slag is dry method
The polished obtained granularity of carbide slag product caused by acetylene technique is less than the finished product of 200 mesh.Carbide slag, magnesia and catalysis
Calcium carbide slag treating agent is obtained after agent is well mixed.
Preparation example 3
The calcium carbide slag treating agent is made up of 15 parts by weight magnesia, 2 part by weight of catalyst and 83 parts by weight carbide slags.Oxidation
The activated magnesia of magnesium is more than 80wt%, granularity is less than the powder of 100 mesh, catalyst V2O5, carbide slag is dry acetylene generation process
The caused polished obtained granularity of carbide slag product is less than the finished product of 200 mesh.Carbide slag, magnesia and catalyst mixing are equal
Calcium carbide slag treating agent is obtained after even.
Embodiment 1
(1) flue gas dry desulfurizing denitration is carried out using the calcium carbide slag treating agent of preparation example 1, so as to form containing sulfate and nitre
The desciccate of hydrochlorate.The content of sulfur dioxide of the flue gas of porch is 620mg/Nm3, amount of nitrogen oxides 430mg/Nm3、
Oxygen content is 15vol%, flow velocity 3.5m/s and temperature are 130 DEG C.
(2) by the desciccate of containing sulfate and nitrate (granularity is 50 mesh, moisture content is less than 1wt%) and industrial solid
Waste (granularity is 50 mesh) is well mixed, in material ball ratio is 1 by the mixture so as to form mixture:Forced under conditions of 10
100min is ground, so as to obtain binder materials.
The material proportion and testing result of binder materials are referring to Tables 1 and 2.
The material proportion of table 1, binder materials
| Specification | Desciccate | Grain slag | Flyash |
| g | 60 | 10 | 30 |
The testing result of table 2, binder materials
Embodiment 2
In addition to changing material variety and its proportioning, other conditions are same as Example 1.The material proportion of binder materials
With testing result referring to table 3 and table 4.
The material proportion of table 3, binder materials
| Specification | Desciccate | Slag | Grain slag |
| g | 60 | 10 | 30 |
The testing result of table 4, binder materials
Embodiment 3
In addition to changing material variety and its proportioning, other conditions are same as Example 1.The material proportion of binder materials
With testing result referring to table 5 and table 6.
The material proportion of table 5, binder materials
| Specification | Desciccate | Slag | Building waste powder |
| g | 60 | 10 | 30 |
The testing result of table 6, binder materials
Performance test is carried out to the binder materials of embodiment 1~3, its performance indications meets GBT50448-2008 regulation,
Stipulated time expansion rate is smaller, and early strength is high, good fluidity.The binder materials of the present invention is in remedial water cement concrete, energy
It is enough to shorten the repairing time, and reduce the corrosion to cement concrete and failure probability.
The present invention is not limited to above-mentioned embodiment, in the case of without departing substantially from the substantive content of the present invention, this area skill
Any deformation, improvement, the replacement that art personnel are contemplated that each fall within the scope of the present invention.
Claims (10)
- A kind of 1. method of binder materials, it is characterised in that comprise the following steps：(1) dry desulfurization denitration is carried out to flue gas using calcium carbide slag treating agent, so as to form the drying of containing sulfate and nitrate Product；The calcium carbide slag treating agent includes 65~95 parts by weight carbide slags, 5~30 parts by weight magnesia and the catalysis of 1~6 parts by weight Agent；Wherein, described catalyst is selected from TiO2、Al(OH)3、V2O5、WO3、K2O, binuclear phthalocyanine ferro-cobalt (II) or CaSiO3In One or more, described calcium carbide slag treating agent do not contain calcium oxide；(2) gross weight based on binder materials, by the industrial solid of 40~70wt% desciccate and 30~60wt% Waste is mixed to form mixture, and the mixture is ground to obtain the binder materials.
- 2. according to the method for claim 1, it is characterised in that in step (1), described carbide slag is dry acetylene generation process The caused polished obtained granularity of carbide slag product is less than the finished product of 200 mesh；Described magnesia is that granularity is less than 100 mesh Powder, its active oxidation content of magnesium is more than 70wt%.
- 3. according to the method for claim 1, it is characterised in that in step (1), the calcium carbide slag treating agent is by following components Composition：1) 92 parts by weight carbide slag, 5 parts by weight magnesia and 3 parts by weight of titanium dioxide；Or2) 87.6 parts by weight carbide slag, 10 parts by weight magnesia and 2.4 parts by weight aluminium hydroxides；Or3) 83 parts by weight carbide slag, 15 parts by weight magnesia and 2 parts by weight vanadic anhydrides.
- 4. according to the method for claim 1, it is characterised in that in step (1), described calcium carbide slag treating agent is dry powder Shape.
- 5. according to the method for claim 1, it is characterised in that in the dry desulfurization denitrification process of step (1), the cigarette The content of sulfur dioxide of gas is 380~680mg/Nm3, amount of nitrogen oxides be 380~500mg/Nm3, oxygen content be 15~ 20vol%, flow velocity are 3~5m/s and temperature is 125~145 DEG C.
- 6. according to the method for claim 1, it is characterised in that in step (2), the gross weight based on binder materials is described The dosage of desciccate is 55~65wt%, and the dosage of the industrial solid wastes is 35~45wt%.
- 7. according to the method for claim 1, it is characterised in that in step (2), the industrial solid wastes be selected from grain slag, One or more in slag, flyash, building waste powder.
- 8. according to the method for claim 1, it is characterised in that in step (2), the granularity of the desciccate is 30~70 Mesh and moisture content is less than or equal to 1wt%；The granularity of the industrial solid wastes is 30~70 mesh.
- 9. according to the method for claim 8, it is characterised in that described to be ground in material ball ratio be 1 in step (2):9 60~180min of controlled lapping under conditions of~11.
- 10. according to the method described in any one of claim 1~9, it is characterised in that in step (2), the industrial solid wastes One kind selected from following combination：(1) weight proportion is 1:2~3 grain slag and flyash；(2) weight proportion is 1:2~3 slag and grain slag；(3) weight proportion is 1:2~3 slag and building waste powder.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103752147A (en) * | 2014-01-21 | 2014-04-30 | 福建龙净脱硫脱硝工程有限公司 | Dry desulfurization agent and preparation method thereof |
| CN105126598A (en) * | 2015-09-16 | 2015-12-09 | 石河子开发区莱蒙钙业有限公司 | Desulfurizing agent prepared by using acetylene sludge as raw materials |
| CN105859166A (en) * | 2016-03-28 | 2016-08-17 | 北京中晶环境科技股份有限公司 | Modified magnesium oxysulfate cement for foaming and foam material thereof |
-
2017
- 2017-09-30 CN CN201710939772.5A patent/CN107640953A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103752147A (en) * | 2014-01-21 | 2014-04-30 | 福建龙净脱硫脱硝工程有限公司 | Dry desulfurization agent and preparation method thereof |
| CN105126598A (en) * | 2015-09-16 | 2015-12-09 | 石河子开发区莱蒙钙业有限公司 | Desulfurizing agent prepared by using acetylene sludge as raw materials |
| CN105859166A (en) * | 2016-03-28 | 2016-08-17 | 北京中晶环境科技股份有限公司 | Modified magnesium oxysulfate cement for foaming and foam material thereof |
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Address after: 100176 Ronghua International Building No. 3, 10 Ronghua South Road, Beijing Daxing Economic and Technological Development Zone, 20th Floor Applicant after: Zhongjing Blue Industrial Group Co., Ltd. Address before: 100176 Ronghua International Building No. 3, 10 Ronghua South Road, Beijing Daxing Economic and Technological Development Zone, 20th Floor Applicant before: MICROTEK blue Industrial Co., Ltd. |
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Application publication date: 20180130 |