CN111929128A - Method for reducing gasification reactivity of coke with higher reactivity - Google Patents
Method for reducing gasification reactivity of coke with higher reactivity Download PDFInfo
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- CN111929128A CN111929128A CN202010732205.4A CN202010732205A CN111929128A CN 111929128 A CN111929128 A CN 111929128A CN 202010732205 A CN202010732205 A CN 202010732205A CN 111929128 A CN111929128 A CN 111929128A
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- 239000000571 coke Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 56
- 230000009257 reactivity Effects 0.000 title claims abstract description 45
- 238000002309 gasification Methods 0.000 title claims abstract description 43
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000004327 boric acid Substances 0.000 claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 238000005507 spraying Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims description 23
- 239000000243 solution Substances 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 18
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 7
- 238000005273 aeration Methods 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000003245 coal Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005235 decoking Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a method for reducing the gasification reactivity of high-reactivity coke in a blast furnace, and simultaneously, the method can maintain a certain reaction. The method mainly comprises the step of spraying coke by utilizing a water solution of boric acid in a certain proportion. The coke with the attached boric acid-based material will exhibit CO2A phenomenon that gasification reactivity is lowered and strength is increased after reaction. The method has important significance in production, effectively controls the gasification of high-quality coke with high cost, increases the gasification of pulverized coal and inferior coke, and ensures the strength of a stock column in a blast furnace. Not only can reduce the cost, but also can ensure the stable and safe production of the blast furnace.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a method for reducing gasification reactivity of high-reactivity coke.
[ background of the invention ]
With the gradual shortage of high-quality coking coal resources, the quality of coke is influenced to a certain extent. In the top-to-bottom movement of the coke in the blast furnace, the coke undergoes complex gas-solid dissolution loss reaction, then the strength of the coke is deteriorated, and banyanxi is crushed to form fine particles, so that the permeability and liquid permeability in the blast furnace are deteriorated, and the stable production of the blast furnace is influenced. A plurality of passivators are used in production at present, and comprise a coking process, a decoking process and the like. But the ideal effect is not achieved through experiments and production tests.
Therefore, there is a need to develop a combined repairable small billet high pulling rate crystallizer to overcome the shortcomings of the prior art, so as to solve or alleviate one or more of the above problems.
[ summary of the invention ]
In view of the above, the present invention provides a method of reducing the reactivity of gasification of highly reactive char, by which the strength after the gasification reaction of char is increased while reducing the reactivity of gasification of char. The invention avoids complex proportioning in the using process of the coke passivator and achieves the purpose of reducing the gasification performance of the coke by simple operation and method. Effectively controls the gasification of high-quality coke with high cost, increases the gasification of pulverized coal and inferior coke, and ensures the strength of the charge column in the blast furnace. Not only can reduce the cost, but also can ensure the stable and safe production of the blast furnace.
In one aspect, the present invention provides a method of reducing the reactivity of gasification of higher reactivity coke, the method comprising the steps of:
(1) forming a coke sample into a cylindrical style by using a drilling machine and a cutting machine, and drying at low temperature;
(2) dissolving boric acid with deionized water to prepare boric acid aqueous solutions with different concentrations;
(3) spraying boric acid solution on the dried cylindrical coke pattern, and drying again;
(4) and (3) performing CRI and CSR measurement on the coke sprayed with the boric acid according to national standards.
The above aspects and any possible implementation manners further provide an implementation manner that the adhesion of boric acid on the coke surface can inhibit the coke from CO to some extent2The strength after the reaction is improved.
The above aspects and any possible implementation manners further provide an implementation manner, and by improving the gasification condition of the coke, the application range of the coke in the blast furnace can be increased, and the production cost can be reduced.
The above aspects and any possible implementation manners further provide an implementation manner, and the cylindrical coke sample with the average diameter of 20 mm-40 mm and the height of 20 mm-40 mm is selected in the step (1).
The above aspects and any possible implementation manners further provide an implementation manner, wherein the drying temperature in the step (1) is 105-115 ℃, and the drying time is 0.5-2 h.
In the aspect and any possible implementation manner described above, an implementation manner is further provided, in which the mixture concentration of the boric acid solution in the step (2) is 0.5 to 2.5 wt%, the boric acid sample is analytically pure, and the mass percentage concentration is selected in the process and converted into the corresponding volume concentration of 3mg/ml to 15 mg/ml.
The above aspect and any possible implementation manner further provide an implementation manner, wherein the boric acid solution in step (3) is used for treating the coke, and 10 to 40ml of boric acid solution with a concentration of 0.5 to 2.5 wt% is uniformly sprayed on the surface of the cylindrical coke pattern through a spray can.
The above aspect and any possible implementation manner further provide an implementation manner, wherein the drying temperature of the coke after the spraying treatment in the step (3) is 105-115 ℃, and the drying time is 2-4 h.
The above-mentioned aspects and any possible implementation manners further provide an implementation manner, and the gasification experimental process of the step (4) is performed in a programmed temperature control furnace with adjustable atmosphere.
The above aspects and any possible implementation manners further provide an implementation manner, steps(4) The process of reactivity and strength after reaction of the coke sprayed with the boric acid is set as the conditions of a laboratory, the temperature range is set between 900 ℃ and 1300 ℃, and the temperature range is matched with CO2The reaction time is selected to be 0.5 h-2 h.
The above-mentioned aspects and any possible implementation manners further provide an implementation manner, and the step (4) is performed with CO2Before and after the reaction, high-purity argon Ar is used as protective gas in the process.
The above aspect and any possible implementation further provides an implementation, wherein in the step (4), the coke and the CO are mixed2The full reaction is carried out, and CO is required to be reacted in the process2The aeration rate of (A) is at least 2.5L/min.
Compared with the prior art, the invention can obtain the following technical effects: the invention avoids complex proportioning in the using process of the coke passivator and achieves the purpose of reducing the gasification performance of the coke by simple operation and method. Meanwhile, a larger reaction temperature interval is selected in the process, so that the wide range of the soft melting zone in the actual blast furnace and larger temperature change are truly simulated. Effectively controls the gasification of high-quality coke with high cost, increases the gasification of pulverized coal and inferior coke, and ensures the strength of the charge column in the blast furnace. Not only can reduce the cost, but also can ensure the stable and safe production of the blast furnace.
Of course, it is not necessary for any one product in which the invention is practiced to achieve all of the above-described technical effects simultaneously.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a graph of carbon conversion as a function of temperature for different boric acid solution spray cokes in example 1 of the present invention;
FIG. 2 is a schematic view showing a simulation of a gasification reaction in example 1 of the present invention;
FIG. 3 is a microscopic morphology of boric acid adhered to the surface of coke in example 1 of the present invention;
FIG. 4 is a schematic view of a temperature controlled furnace used in a gasification process in example 1 of the present invention;
FIG. 5 is a graph showing reactivity and post-reaction strength measured according to a given method after gasification in example 1 of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The present invention provides a method of reducing the reactivity of gasification of higher reactivity coke, the method comprising the steps of:
(1) forming a coke sample into a cylindrical coke style by using a drilling machine and a cutting machine, and drying at low temperature;
(2) dissolving boric acid with deionized water to prepare boric acid aqueous solutions with different concentrations;
(3) spraying boric acid solution on the dried cylindrical coke pattern, and drying again;
(4) and (3) performing CRI and CSR measurement on the coke sprayed with the boric acid according to national standards.
In the step (1), a cylindrical coke sample with the average diameter of 20-40 mm and the height of 20-40 mm is selected, the drying temperature is 105-115 ℃, and the drying time is 0.5-2 h.
The proportioning concentration of the boric acid solution in the step (2) is 0.5-2.5 wt%, the boric acid sample is analytically pure, and the mass percentage concentration is selected in the process and converted into the corresponding volume concentration of 3-15 mg/ml.
The process of treating the coke with the boric acid solution in the step (3) is to uniformly spray 10-40 ml of boric acid solution with the concentration of 0.5-2.5 wt% on the surface of the cylindrical coke pattern through a spray can, wherein the drying temperature of the sprayed coke is 105-115 ℃, and the drying time is 2-4 hours.
The gasification experiment process in the step (4) is carried out in a program temperature control furnace with adjustable atmosphere, the process of carrying out reactivity and strength after reaction on the coke sprayed with the boric acid is set as the conditions of a laboratory, the temperature range is set between 900 ℃ and 1300 ℃, and the temperature range is set with CO2The reaction time is selected to be 0.5 h-2 h, and the reaction is performed with CO in the step (4)2Before and after the reaction, high-purity argon Ar is used as protective gas in the process, and coke and CO are reacted in the step (4)2The full reaction is carried out, and CO is required to be reacted in the process2The aeration rate of (A) is at least 2.5L/min.
Example 1
The schematic diagram of the actual gasification reaction in the blast furnace is shown in FIG. 1, and the patent only aims at coke and CO2In the middle of the gasification reaction. The embodiment provides a method for reducing the gasification reactivity of coke and increasing the strength of the coke after gasification reaction, which comprises the following steps:
(1) cutting the block carbon material sample to be measured into
And dried at 105 ℃ for 0.5 h.
Specifically, the coke with higher reactivity commonly used in the production is selected for the experiment, and the coke reactivity is 52.29 and the strength after reaction is 28.47 when the coke is measured according to the conditions set in the experiment.
(2) Dissolving boric acid in deionized water to prepare a boric acid aqueous solution;
specifically, an analytically pure reagent is selected in the experiment, the proportioning concentration of the boric acid solution is 0.5-2.5 wt%, the boric acid sample is analytically pure, and the mass percentage concentration is selected in the process and converted into the corresponding volume concentration of 3-15 mg/ml.
(3) The process of treating the coke by the boric acid solution is to uniformly spray 10ml of the solution with the concentration of 0.5-2.5 wt% on the surface of a coke sample by using a spray can.
(4) The gasification experiment process is carried out in a program temperature control furnace with adjustable atmosphere, and four different reaction temperatures are selected in the experiment;
specifically, the reaction is carried out at 950 ℃, 1050 ℃, 1150 ℃ and 1250 ℃ with CO2Reacting for 2h, wherein CO is generated in the reaction process2The aeration rate of (A) is at least 2.5L/min, and CO2Before and after the reaction, high-purity argon Ar is used as protective gas in the process. Other treatment methods set reference national standard coke reactivity and post-reaction strength. A schematic diagram of the experimental temperature-controlled programmed furnace is shown in FIG. 2.
In the step (2), the adhesion of boric acid to the coke surface can be suppressed to some extent by the coke on CO as shown in FIG. 32The strength after the reaction is improved, and meanwhile, the application range of the coke in the blast furnace can be improved and the production cost is reduced by improving the gasification condition of the coke.
The reactivity and strength change after reaction of the boric acid treated coke obtained by the process are shown in FIG. 4. It is obvious from the figure that after the boric acid is sprayed on the surface of the coke, the reactivity of the coke is obviously reduced, and the strength after the reaction is obviously improved. FIG. 5 is a graph showing the carbon conversion rate of coke sprayed with different boric acid solutions as the temperature changes, and it is apparent from the graph that the addition ratio of boric acid is high, which has an obvious effect on reducing the gasification reactivity of coke.
The method for reducing the gasification reactivity of the coke with higher reactivity provided by the embodiments of the present application is described in detail above. The above description of the embodiments is only for the purpose of helping to understand the method of the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
As used in the specification and claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (10)
1. A method of reducing the reactivity of gasification of higher reactivity char, the method comprising the steps of:
(1) forming a coke sample into a cylindrical coke style by using a drilling machine and a cutting machine, and drying at low temperature;
(2) dissolving boric acid with deionized water to prepare boric acid aqueous solutions with different concentrations;
(3) spraying boric acid solution on the dried cylindrical coke pattern, and drying again;
(4) and (3) performing CRI and CSR measurement on the coke sprayed with the boric acid according to national standards.
2. The method for reducing gasification reactivity of coke according to claim 1, wherein the cylindrical coke sample having an average diameter of 20mm to 40mm and a height of 20mm to 40mm is selected in the step (1).
3. The method for reducing gasification reactivity of coke with higher reactivity according to claim 1, wherein the drying temperature in the step (1) is 105 ℃ to 115 ℃ and the drying time is 0.5h to 2 h.
4. The method for reducing the gasification reactivity of the coke with higher reactivity according to claim 1, wherein the mixing concentration of the boric acid solution in the step (2) is 0.5-2.5 wt%, the boric acid sample is analytically pure, and the mass percentage concentration is selected in the process and is converted into the corresponding volume concentration of 3-15 mg/ml.
5. The method for reducing gasification reactivity of coke with higher reactivity according to claim 1, wherein the boric acid solution in step (3) is used for treating coke by spraying 10-40 ml of boric acid solution with concentration of 0.5-2.5 wt% onto the surface of cylindrical coke pattern through a spray can.
6. The method for reducing gasification reactivity of coke with higher reactivity according to claim 1, wherein the drying temperature of the coke after spraying treatment in the step (3) is 105 ℃ to 115 ℃ and the drying time is 2h to 4 h.
7. The method for reducing gasification reactivity of higher reactivity coke according to claim 1, wherein the gasification experimental process of step (4) is performed in a temperature programmed furnace whose atmosphere can be adjusted.
8. The method for reducing gasification reactivity of coke with higher reactivity according to claim 1, wherein the reactivity and strength after reaction of the coke sprayed with boric acid in the step (4) are set in laboratory conditions, and the temperature range is set between 900 ℃ and 1300 ℃, and the temperature range is set to be CO2The reaction time is selected to be 0.5 h-2 h.
9. The method for reducing the reactivity of gasification of higher reactivity coke according to claim 1, wherein step (4) is performed with CO2Before and after the reaction, high-purity argon Ar is used as protective gas in the process.
10. The method for reducing gasification reactivity of higher reactivity coke according to claim 1, wherein the step (4) is to subject the coke to CO2The full reaction is carried out, and CO is required to be reacted in the process2The aeration rate of (A) is at least 2.5L/min.
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| CN202010732205.4A CN111929128A (en) | 2020-07-27 | 2020-07-27 | Method for reducing gasification reactivity of coke with higher reactivity |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000026865A (en) * | 1998-07-15 | 2000-01-25 | Kansai Coke & Chem Co Ltd | Production of metallurgical coke |
| CN1392223A (en) * | 2002-04-30 | 2003-01-22 | 重庆大学 | Coke modifying process |
| CN101531939A (en) * | 2008-07-16 | 2009-09-16 | 郑州大学 | Coke deterioration inhibitor and preparation method thereof |
| CN104449942A (en) * | 2014-11-04 | 2015-03-25 | 华文蔚 | Process for improving thermal effect of cokes during steelmaking |
-
2020
- 2020-07-27 CN CN202010732205.4A patent/CN111929128A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000026865A (en) * | 1998-07-15 | 2000-01-25 | Kansai Coke & Chem Co Ltd | Production of metallurgical coke |
| CN1392223A (en) * | 2002-04-30 | 2003-01-22 | 重庆大学 | Coke modifying process |
| CN101531939A (en) * | 2008-07-16 | 2009-09-16 | 郑州大学 | Coke deterioration inhibitor and preparation method thereof |
| CN104449942A (en) * | 2014-11-04 | 2015-03-25 | 华文蔚 | Process for improving thermal effect of cokes during steelmaking |
Non-Patent Citations (2)
| Title |
|---|
| 崔平 等: "焦炭的钝化处理及其机理", 《钢铁研究学报》 * |
| 张洪宇: "采用喷洒硼酸提高焦炭热性能的研究", 《万方学位论文数据库》 * |
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Application publication date: 20201113 |