CN101481141A - Method for decomposing zircon sand - Google Patents
Method for decomposing zircon sand Download PDFInfo
- Publication number
- CN101481141A CN101481141A CNA2008100490255A CN200810049025A CN101481141A CN 101481141 A CN101481141 A CN 101481141A CN A2008100490255 A CNA2008100490255 A CN A2008100490255A CN 200810049025 A CN200810049025 A CN 200810049025A CN 101481141 A CN101481141 A CN 101481141A
- Authority
- CN
- China
- Prior art keywords
- section
- zircon sand
- alkali
- temperature
- minutes
- 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.)
- Granted
Links
Images
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention discloses a method for decomposing zircon sand, which comprises the following steps: 1. mixing evenly the zircon sand and alkali in proportion by weight of 1:1.30 to 1:1.20; 2. heating the even mixture of the zircon sand and the alkali in a preheating section for 20 to 30 hours at a temperature of between 600 and 750 DEG C after being evenly mixed, heating the mixture in a high temperature section for 8 to 15 minutes at a temperature of between 850 and 950 DEG C to perform reaction, heating the mixture in a temperature insulating section for 8 to 15 minutes at a temperature of between 350 and 450 DEG C, and finally, entering a cooling section to obtain zircon salt, wherein the preheating section, the high temperature section, the temperature insulating section and the cooling section are arranged inside the same sealing equipment. Due to the adoption of the technical scheme, the zircon sand and the alkali enter the sealing equipment from one end of the sealing equipment, and are sent out from the other end of the sealing equipment, the whole production process is performed continuously, the heat energy utilization rate is increased, and the energy consumption is reduced.
Description
Technical field
The invention belongs to the decomposition method of zircon sand in the zirconates production process.
Background technology
In the domestic production zirconates operation, zircon sand and solid caustic soda are under high-temperature fusion at present, and the reaction that interacts is as follows: (major ingredient reaction)
ZrSiO
4+2NaOH＝Na
2ZrSiO
5+H
2O
ZrSiO
4+4NaOH＝Na
2ZrO
3+Na
2SiO
3+2H
2O
ZrSiO
4+6NaOH＝Na
2ZrO
3+Na
4SiO
4+3H
2O
The zircon sand decomposition course exists to be interrupted to be produced, and alkal melting pan is sling back and forth, and runout everywhere, and heat energy loss is big, and finished product basic zirconium chloride per ton consumes about 2600 cubes of coal gas.Kiln formula stove can not satisfy the alkali fusion processing condition, and the pot body is heated inhomogeneous, the temperature instability, and soaking time is inconsistent, causes the zircon sand rate of decomposition lower, generally about 96.5%.Need strengthen the throwing alkali number for reaching the purpose that improves rate of decomposition, the unit consumption of alkali is higher, with the proportioning of zircon sand about 1.36.Open alkali fusion, environment neutral and alkali dust is more, causes operating environment more abominable.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, but a kind of method that helps the decomposing zircon sand of environmental protection continuous production, transformation efficiency height, less energy consumption is provided.
Technical scheme of the present invention is: a kind of method of decomposing zircon sand may further comprise the steps: A: with weight ratio is that zircon sand and the alkali of 1:1.30-1:1.20 mixes; B: enter preheating section after zircon sand and alkali mixed 600 ℃-750 ℃ heating 20-30 minute down, entering high temperature section then heated 8-15 minute down at 850 ℃-950 ℃, react, enter holding-zone again and heated 8-15 minute down, enter cooling section at last and get zirconates at 350 ℃-450 ℃; Wherein preheating section, high temperature section, holding-zone and cooling section are located in the same sealing equipment.
The method of above-mentioned decomposing zircon sand, added alkali is sodium hydroxide or calcium hydroxide in the described steps A.
The method of above-mentioned decomposing zircon sand, the alkali that adds in the described steps A is sodium hydroxide, the weight ratio of zircon sand and sodium hydroxide is 1:1.26,750 ℃ of heating of preheating section are 25 minutes among the step B, 900 ℃ of heating of high temperature section 10 minutes, 400 ℃ of heating of holding-zone 10 minutes enter cooling section at last.
The method of above-mentioned decomposing zircon sand, used sealing equipment are the tunnel kilns.
Beneficial effect of the present invention: after adopting technique scheme, zircon sand and alkali enter from provision for sealing one end, and the reaction back is sent from the other end, and whole process of production is carried out continuously, improves the heat energy utilization rate, reduces energy consumption.Because the utilization of tunnel furnace reduces the usage quantity of coal, the unit consumption of coal gas can reduce about 25%, is controlled at finished product basic zirconium chloride per ton and consumes about 2000 cubes of coal gas.Tunnel furnace has preheating section, high temperature section, holding-zone, can satisfy the preheating of alkali fusion technology and endure alkali, adds sand reaction, heat-retaining condition requirement, and the pot body is heated evenly, temperature-stable, the soaking time unanimity can improve the zircon sand rate of decomposition, is increased to about 97.5% by about 96.5%.Change sand alkali proportioning and reduce alkali consumption, sand alkali proportioning is reduced to 1:1.26 by original 1:1.36, thereby reduces the alkali usage quantity.And can thoroughly improve the environmental problem in alkali fusion workshop, and solve environmental issue, improve work situation.
Use advantage by " tunnel furnace " is as follows: the one,, improve productive labor efficient, than the conventional base smelting furnace, tunnel furnace has higher continuous production ability and the automated operation degree of Geng Gao, finishes by successive charging and discharging; The 2nd,, adopt clean energy, reduce environmental pollution, adopt coal gas, Sweet natural gas or electricity as power supply, with respect to the coal that the conventional base smelting furnace uses, be the better cleaning energy; The 3rd,, reduce the consumption of the energy, from the structure of tunnel furnace itself, the energy, heat there are higher utilization ratio, fundamentally solve the problem of conventional base smelting furnace high energy consumption; The 4th,, reduce of the pollution of alkali dirt to environment, because the conventional base smelting furnace is a unenclosed construction, under the condition of high temperature alkali fuse, alkali dirt volatilizees in air seriously, environment is caused ill effect, though the equipment that can adopt flue dust to absorb, but can't seal fully and reach the effect of radical cure, adopt tunnel furnace then can thoroughly to address this problem, because the whole system of tunnel furnace seals, high temperature alkali dirt is to volatilize in a large number in air, absorb by sealing, and the volatilization of stopping alkali dirt increases environmental benefit.
Description of drawings
Fig. 1 is a process flow sheet of the present invention
Embodiment
Embodiment 1: zircon sand and sodium hydroxide are mixed by weight 1:1.30, and in the crucible of packing into, crucible is placed on the kiln car.Tunnel furnace is divided into preheating section, high temperature section, holding-zone and cooling section successively, lights a fire three hours, and the temperature of preheating section reaches 600 ℃, and the temperature of high temperature section reaches 850 ℃, and the temperature of holding-zone reaches 350 ℃.Push the kiln car that crucible is housed in the tunnel furnace successively, kiln car was preheating section operation 20 minutes, high temperature section operation 8 minutes, material carries out temperature reaction in high temperature section and decomposes, holding-zone operation 8 minutes, small part unreacted material is completely proceeded reaction, gets the zirconates kiln discharge then after cooling section cools to 150 ℃.
Embodiment 2: in the present embodiment, zircon sand and sodium hydroxide are by weight 1:1.20, and the temperature of preheating section reaches 700 ℃, and the temperature of high temperature section reaches 900 ℃, and the temperature of holding-zone reaches 400 ℃.Kiln car was preheating section operation 25 minutes, and high temperature section operation 10 minutes, holding-zone operation 10 minutes, other was identical with embodiment 1.
Embodiment 3: in the present embodiment, zircon sand and sodium hydroxide are by weight 1:1.21, and the temperature of preheating section reaches 680 ℃, and the temperature of high temperature section reaches 950 ℃, and the temperature of holding-zone reaches 400 ℃.Kiln car was preheating section operation 30 minutes, and high temperature section operation 15 minutes, holding-zone operation 15 minutes, other was identical with embodiment 1.
Embodiment 4: in the present embodiment, zircon sand and sodium hydroxide are by weight 1:1.26, and the temperature of preheating section reaches 750 ℃, and the temperature of high temperature section reaches 950 ℃, and the temperature of holding-zone reaches 450 ℃.Kiln car was preheating section operation 25 minutes, and high temperature section operation 10 minutes, holding-zone operation 10 minutes, other was identical with embodiment 1.
Embodiment 5: in the present embodiment, zircon sand and sodium hydroxide reach 750 ℃ by weight the temperature of 1:1.26 preheating section, and the temperature of high temperature section reaches 900 ℃, and the temperature of holding-zone reaches 400 ℃.Kiln car was preheating section operation 25 minutes, and high temperature section operation 10 minutes, holding-zone operation 10 minutes, other was identical with embodiment 1.
Sodium hydroxide can substitute with calcium hydroxide among the above embodiment.
Above-mentioned zircon sand and alkali can carry out in sealing equipment, as long as carry out the effect that can both reach same in sealing equipment.
Claims (4)
1, a kind of method of decomposing zircon sand may further comprise the steps: A: with zircon sand: the weight ratio of alkali is that 1:1.30-1:1.20 mixes; B: enter preheating section after zircon sand and alkali mixed 600 ℃-750 ℃ heating 20-30 minute down, entering high temperature section then heated 8-15 minute down at 850 ℃-950 ℃, react, enter holding-zone again and heated 8-15 minute down, enter cooling section at last and get zirconates at 350 ℃-450 ℃; Wherein preheating section, high temperature section, holding-zone and cooling section are located in the same sealing equipment.
2, the method for decomposing zircon sand according to claim 1 is characterized in that: added alkali is sodium hydroxide or calcium hydroxide in the steps A.
3, the method for decomposing zircon sand according to claim 2, it is characterized in that: the alkali that adds in the described steps A is sodium hydroxide, the weight ratio of zircon sand and sodium hydroxide is 1:1.26,750 ℃ of heating of preheating section are 25 minutes among the step B, 900 ℃ of heating of high temperature section 10 minutes, 400 ℃ of heating of holding-zone 10 minutes enter cooling section at last.
4, according to the method for claim 2 or 3 described decomposing zircon sands, it is characterized in that: above-mentioned sealing equipment is the tunnel kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100490255A CN101481141B (en) | 2008-01-08 | 2008-01-08 | Method for decomposing zircon sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100490255A CN101481141B (en) | 2008-01-08 | 2008-01-08 | Method for decomposing zircon sand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101481141A true CN101481141A (en) | 2009-07-15 |
| CN101481141B CN101481141B (en) | 2010-10-13 |
Family
ID=40878461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100490255A Expired - Fee Related CN101481141B (en) | 2008-01-08 | 2008-01-08 | Method for decomposing zircon sand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101481141B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060326A (en) * | 2010-11-22 | 2011-05-18 | 北京有色金属研究总院 | Alkali fusion continuous decomposing process method of zirconite |
| CN105236481B (en) * | 2014-07-08 | 2018-03-23 | 中国科学院过程工程研究所 | A kind of method of low temperature liquid phase decomposing zircon sand |
| CN117088410A (en) * | 2023-08-14 | 2023-11-21 | 厦门铖融信息科技有限公司 | Zircon sand tailing extraction process |
-
2008
- 2008-01-08 CN CN2008100490255A patent/CN101481141B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060326A (en) * | 2010-11-22 | 2011-05-18 | 北京有色金属研究总院 | Alkali fusion continuous decomposing process method of zirconite |
| CN102060326B (en) * | 2010-11-22 | 2013-03-27 | 北京有色金属研究总院 | Alkali fusion continuous decomposing process method of zirconite |
| CN105236481B (en) * | 2014-07-08 | 2018-03-23 | 中国科学院过程工程研究所 | A kind of method of low temperature liquid phase decomposing zircon sand |
| CN117088410A (en) * | 2023-08-14 | 2023-11-21 | 厦门铖融信息科技有限公司 | Zircon sand tailing extraction process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101481141B (en) | 2010-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101957134B (en) | Method for utilizing residual heat of tunnel furnace for sintering perforated bricks from by using coal gangue | |
| CN206583290U (en) | A kind of aluminium melting furnace burning and EGR | |
| CN103776270A (en) | Calcium carbide sensible heat recovery equipment and method for calcium carbide furnace | |
| CN104909547B (en) | The high-efficient energy-saving kiln production line of production high-performance foam glass | |
| CN101481141B (en) | Method for decomposing zircon sand | |
| CN101329140A (en) | Facilities for high effectively utilizing acetylene stones sensible heat | |
| CN102001837A (en) | Method and device for calcining materials by using low calorific value fuel | |
| CN208223035U (en) | A kind of carbon brick production far-infrared electric dry kiln | |
| CN112010346B (en) | Arsenic trioxide purification system and purification method | |
| CN106540525A (en) | A method and device for synergistically utilizing slag and waste water to stabilize CO2 in waste gas | |
| CN104418484A (en) | Fuel-gas double-preheating high-temperature oxygen-enriched hydrocarbon heat circulation nitrogen-free unidirectional radiation combustion system | |
| CN110127628B (en) | Industrial production equipment and process for sodium sulfide in tank furnace | |
| CN209623331U (en) | A kind of energy-efficient combined shaft kiln | |
| CN105948048B (en) | Energy saving and environment friendly carbon disulfide gasification reacting furnace | |
| CN108546132A (en) | A method of preparing foamed ceramic material using blast furnace hot molten slag | |
| CN205773374U (en) | Energy saving and environment friendly Carbon bisulfide gasification reacting furnace | |
| CN203725484U (en) | Harmless disposal system for aluminum electrolysis waste carbon residue | |
| CN106766890A (en) | A kind of new-type burning of aluminium melting furnace and the circulatory system | |
| CN106556003A (en) | A kind of energy-saving type heat-preserving boiler | |
| CN206160701U (en) | Smelt smelting furnace of going back base iron and mineral rock wool in step | |
| CN110273071A (en) | It is a kind of using inert gas blow and inside and outside combined heat the continuous magnesium smelting reducing furnace system of minute-pressure | |
| CN101738081A (en) | Shaft kiln | |
| CN101280358B (en) | Reducing smelting furnace for regenerating metals | |
| CN204757648U (en) | Prepare vertical reverberatory furnace of water -cooling of vulcanized sodium in succession | |
| CN204752205U (en) | Vertical pair of furnace reverberatory furnace of preparation vulcanized sodium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101013 Termination date: 20170108 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |