CN85101604B - Mechanical dispersing method for manufacturing high strengh ball catalyst in ammonia synthesizing - Google Patents
Mechanical dispersing method for manufacturing high strengh ball catalyst in ammonia synthesizing Download PDFInfo
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- CN85101604B CN85101604B CN85101604A CN85101604A CN85101604B CN 85101604 B CN85101604 B CN 85101604B CN 85101604 A CN85101604 A CN 85101604A CN 85101604 A CN85101604 A CN 85101604A CN 85101604 B CN85101604 B CN 85101604B
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- China
- Prior art keywords
- ammonia
- raw material
- slurry
- catalyst
- intensity
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- 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.)
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
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- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention relates to a mechanical dispersing method for preparing spherical catalysts by high-intensity ammonia, which belongs to the technical field of chemical engineering. The method takes magnetite, etc. as a raw material, the raw material is smelted in an electric furnace, the melted slurry is then poured onto the surface of a roller rotating in a water trough with proper height so as to crush the melted slurry, the crushed slurry is shrunk into pellets through surface tension, and high-intensity spherical catalysts are prepared after heat treatment. The present invention has the obvious advantages of simple technological equipment, high spheroidization coefficient of products, high proportion of large pellets, extremely small pellet resistance to airflow, capability of saving 20 degrees of electricity when each ton of ammonia is produced, uniform airflow distribution, small temperature difference on the same plane, high net value of ammonia and capability of improving the production capacity by 10%.
Description
The present invention is the manufacture method of producing high-strength ammonia synthesising shape catalyst with mechanical dispersion method.
" Henan chemical industry " NO1,1981; The Henan chemical institute; Introduced a kind of method that adopts fluid decentralized system spherical ammonia synthetic catalyst in " HLA-1 type spherical ammonia synthetic catalyst development report ".This method is with fusions in resistance furnace after the various material preparations, adopts current or the air-flow with certain pressure then, and the liquid of fusion is starched the drop that is dispersed into different sizes, after the space chance is cold, falls into the natural balling-up of trapping solution.The product yield that adopts this method to make is not high, and greater than 6.7 millimeters the balls circles partially that belong to, the part ball still has hollow more, and mechanical strength still can not satisfy the requirement of directly falling down from the top when adorning high tower, and catalyst form is also undesirable.
Intensity at present ball catalyst in ammonia synthesizing is lower, the present situation that form factor is not high, the present invention proposes a kind of new manufacture method, and purpose is to improve the intensity of ball catalyst in ammonia synthesizing, and making catalyst that smooth surface be arranged, high form factor and big particle ratio are many.
The present invention is with simply can industrialized technology, produces high strength, high activity, spherical ammonia synthesis catalyst.Method is with the balling-up of fused mass granulating one-step method.Be with picking of raw material magnetic iron ore and aluminium oxide, potassium nitrate, calcium carbonate etc.When packing melting in the electric furnace, melting after mixing by a certain percentage into ferrous iron and ferric ratio in the molten slurry of pure iron adjustment.When melting is reached home, the electric furnace rear portion is promoted, slowly pour out molten slurry, make molten the slurry on the roller that drops to rotation be dispersed into droplet, the molten slurry of droplet is shrunk to sphere or subglobular by the surface tension of himself.Enter again and carry out hurried cooling in the water or the aqueous solution, condense into the approximate spherical particle that varies in size, by the separation machine that has mesh ball and solution are separated, in 30～800 ℃, heat-treat, fortifying catalytic agent intensity, screen again and remove unfashioned irregular particle, become various varigrained spheric catalyst finished products.This product can reduce resistance when industry is used, produce ammonia per ton and can save more than power consumption 15 degree, can improve production capacity about 10% with similar irregular catalyst ratio.
Example: 130 kilovolt-amperes of this process using furnace transformers, from 650 millimeters, the roller face is to 0.3～2.5 meter of the distance of liquid level to the roller identity distance for 3 meters of electric smelting furnace superintendents, wide 0.8 meter, high 0.6 meter, (as accompanying drawing) discharging opening, solution temperature is greater than 40 ℃, 275 millimeters of roller diameters, 40～120 rev/mins of rotating speeds, 150 millimeters of amplitudes, frequency 40 times/minute, balling-up pond φ 2500 adds 350 kilograms of mixed mineral powders, 17 kilograms of pure iron; Go out to melt 320 kilograms in slurry, disperse through roller, the hurried cooling balling-up of solution is heat-treated in 30～800 ℃ of scopes of temperature after the granulation, again through screening 160 kilograms of finished products.The finished form factor is greater than 0.85, and intensity, activity conform to requirement.
Outstanding advantage of the present invention is: production technology is simple, shape of product factor height, and surperficial garden is sliding, and the resistance spy is little, produces that ammonia per ton can be saved about power consumption 20 degree, the product strength high activity is good, good heat resistance, mithridatism be strong, can improve synthetic tower production capacity 10%.
Claims (1)
1, a kind of method for preparing high-strength ammonia synthesising shape catalyst, select selected magnetic iron ore for use, aluminium oxide, potassium nitrate, calcium carbonate etc. are raw material, the melting in the electric furnace of packing into after this raw material all mixes, molten slurry is toppled over from the discharging opening of 650 millimeters in distance roller face, the molten slurry of pouring out is dispersed into droplet by the rotating drum of 40～120 rev/mins of rotating speeds, fall into subsequently with the roller identity distance and cool off greater than the balling-up pond of 40 degree from 0.3～2.5 meter solution temperature, form spherical particle, again by a separation machine that has mesh, spheric granules and solution are separated, heat-treat at 800 ℃ at last, get the catalyst finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85101604A CN85101604B (en) | 1985-04-01 | 1985-04-01 | Mechanical dispersing method for manufacturing high strengh ball catalyst in ammonia synthesizing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85101604A CN85101604B (en) | 1985-04-01 | 1985-04-01 | Mechanical dispersing method for manufacturing high strengh ball catalyst in ammonia synthesizing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85101604A CN85101604A (en) | 1986-03-10 |
| CN85101604B true CN85101604B (en) | 1988-05-25 |
Family
ID=4791933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85101604A Expired CN85101604B (en) | 1985-04-01 | 1985-04-01 | Mechanical dispersing method for manufacturing high strengh ball catalyst in ammonia synthesizing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85101604B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047098C (en) * | 1994-06-19 | 1999-12-08 | 浙江工业大学 | Pre-reduction type ammonia synthesis catalyst and preparing process |
| CN1047099C (en) * | 1994-06-21 | 1999-12-08 | 浙江工业大学 | Catalyst for synthesizing ammonia and its preparing method |
-
1985
- 1985-04-01 CN CN85101604A patent/CN85101604B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85101604A (en) | 1986-03-10 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |