CN101066779B - Process of preparing sodium chromate product without calcium - Google Patents
Process of preparing sodium chromate product without calcium Download PDFInfo
- Publication number
- CN101066779B CN101066779B CN2007100155549A CN200710015554A CN101066779B CN 101066779 B CN101066779 B CN 101066779B CN 2007100155549 A CN2007100155549 A CN 2007100155549A CN 200710015554 A CN200710015554 A CN 200710015554A CN 101066779 B CN101066779 B CN 101066779B
- Authority
- CN
- China
- Prior art keywords
- slaking
- calcining
- chromite
- calcium
- sodium chromate
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The present invention discloses process of preparing sodium chromate product without calcium, and sodium chromate solution is prepared through calcining, hot mixing, calcining to cure, sorting, crushing and leaching. The preparation process has low investment, simple operation, no sintering step, less slag, low power consumption, low production cost, less environmental pollution and other advantages.
Description
Technical field
The present invention relates to a kind of Sodium chromate preparation technology, specifically a kind of process of preparing sodium chromate product without calcium.
Background technology
At present, China makes Sodium chromate and has all adopted the calcium roasting, be exactly first with rhombspar, slaked lime, soda ash mixes with chromite, in the roasting brickkiln, calcine then, filter leaching through fragmentation and make Sodium chromate, the shortcoming of this mode of production is the cost height, the energy consumption height, and it is big to go out the quantity of slag, and generally going out the quantity of slag is that Sodium chromate per ton goes out 2.5-3 ton slag.And slag is difficult to handle, and has high pollution.Mostly adopt the calcium-free roasting technology abroad, but complex process, invest higherly, the domestic calcium technology that also had or not is in recent years produced, and uses chromite and alkali multifuel combustion exactly, but this processing mode interpolation oxygenant is easy to sintering in the kiln.
Summary of the invention
Technical assignment of the present invention provides a kind of process of preparing sodium chromate product without calcium.
Technical assignment of the present invention realizes that in the following manner this processing step is:
The calcining: the chromite grinding particle size is controlled at 150 orders-200 purpose fine powder sends into rotary kiln, 1250 ℃-1300 ℃ temperature lower calcination 30-90 minute;
Heat is mixed: the chromite powder after will calcine produces back and soda ash by 100: the part by weight of 72-80 mixes;
Calcining slaking: mixed chromite and soda ash mixture are sent into rotary kiln calcining slaking again;
Letter sorting: sort out after the calcining slaking the good material of unreacted in the mixture;
Broken: the oversize material particle size after cracking that slaking is good is controlled at 3 orders-8 order;
Leaching: the slaking material after the fragmentation is put into water soak, stir, precipitation, the slagging-off back obtains chromium acid sodium solution.
The material that the unreacted that sorts out is good can mix with chromite, recycling; Material can mix with chromite through the chromium slag of leaching post precipitation, recycling.
Process of preparing sodium chromate product without calcium of the present invention, it is little to have a facility investment, and technology is simple, no sintering, characteristics such as it is few to go out the quantity of slag, and energy consumption is little, and production cost is low, environmental pollution is little.
Description of drawings
Accompanying drawing is the schema of process of preparing sodium chromate product without calcium.
Embodiment
Embodiment 1:
1000 kilogram of 150 purpose chromite powder sent into rotary kiln, 1250 ℃ of temperature lower calcinations 30 minutes; Chromite powder after the calcining produces the back and mixes with 720 kilograms of soda ash; Mixed chromite and soda ash mixture are sent into rotary kiln calcining slaking again; Sort out then after the calcining slaking that the good material of unreacted mixes with chromite in the mixture, reuse; The oversize material particle size after cracking that slaking is good becomes 3 purpose small-particles; Slaking material after the fragmentation is put into water soak, stir, precipitation, the slagging-off back obtains chromium acid sodium solution; Material can mix with chromite through the chromium slag of leaching post precipitation, recycling.
Embodiment 2:
1000 kilogram of 200 purpose chromite powder sent into rotary kiln, 1300 ℃ of temperature lower calcinations 90 minutes; Chromite powder after the calcining produces the back and mixes with 800 kilograms of soda ash; Mixed chromite and soda ash mixture are sent into rotary kiln calcining slaking again; Sort out then after the calcining slaking that the good material of unreacted mixes with chromite in the mixture, reuse; The oversize material particle size after cracking that slaking is good becomes 8 purpose small-particles; Slaking material after the fragmentation is put into water soak, stir, precipitation, the slagging-off back obtains chromium acid sodium solution; Material can mix with chromite through the chromium slag of leaching post precipitation, recycling.
Embodiment 3:
1000 kilogram of 160 purpose chromite powder sent into rotary kiln, 1260 ℃ of temperature lower calcinations 40 minutes; Chromite powder after the calcining produces the back and mixes with 750 kilograms of soda ash; Mixed chromite and soda ash mixture are sent into rotary kiln calcining slaking again; Sort out then after the calcining slaking that the good material of unreacted mixes with chromite in the mixture, reuse; The oversize material particle size after cracking that slaking is good becomes 5 purpose small-particles; Slaking material after the fragmentation is put into water soak, stir, precipitation, the slagging-off back obtains chromium acid sodium solution; Material can mix with chromite through the chromium slag of leaching post precipitation, recycling.
Embodiment 4:
1000 kilogram of 170 purpose chromite powder sent into rotary kiln, 1270 ℃ of temperature lower calcinations 50 minutes; Chromite powder after the calcining produces the back and mixes with 760 kilograms of soda ash; Mixed chromite and soda ash mixture are sent into rotary kiln calcining slaking again; Sort out then after the calcining slaking that the good material of unreacted mixes with chromite in the mixture, reuse; The oversize material particle size after cracking that slaking is good becomes 4 purpose small-particles; Slaking material after the fragmentation is put into water soak, stir, precipitation, the slagging-off back obtains chromium acid sodium solution; Material can mix with chromite through the chromium slag of leaching post precipitation, recycling.
Embodiment 5:
1000 kilogram of 180 purpose chromite powder sent into rotary kiln, 1280 ℃ of temperature lower calcinations 60 minutes; Chromite powder after the calcining produces the back and mixes with 770 kilograms of soda ash; Mixed chromite and soda ash mixture are sent into rotary kiln calcining slaking again; Sort out then after the calcining slaking that the good material of unreacted mixes with chromite in the mixture, reuse; The oversize material particle size after cracking that slaking is good becomes 6 purpose small-particles; Slaking material after the fragmentation is put into water soak, stir, precipitation, the slagging-off back obtains chromium acid sodium solution; Material can mix with chromite through the chromium slag of leaching post precipitation, recycling.
Embodiment 6:
1000 kilogram of 190 purpose chromite powder sent into rotary kiln, 1290 ℃ of temperature lower calcinations 70 minutes; Chromite powder after the calcining produces the back and mixes with 780 kilograms of soda ash; Mixed chromite and soda ash mixture are sent into rotary kiln calcining slaking again; Sort out then after the calcining slaking that the good material of unreacted mixes with chromite in the mixture, reuse; The oversize material particle size after cracking that slaking is good becomes 7 purpose small-particles; Slaking material after the fragmentation is put into water soak, stir, precipitation, the slagging-off back obtains chromium acid sodium solution; Material can mix with chromite through the chromium slag of leaching post precipitation, recycling.
Claims (1)
1. process of preparing sodium chromate product without calcium is characterized in that this step of preparation process is:
Calcining: send into rotary kiln after chromite powder is broken into 150-200 purpose fine powder, 1250 ℃ of one 1300 ℃ of temperature lower calcinations 30 1 90 minutes;
Heat is mixed: the chromite powder after will calcining produces the back by 100: part by weight and the soda ash of 72-80 mix;
Calcining slaking: mixed chromite and soda ash mixture are sent into rotary kiln calcining slaking again;
Letter sorting: sort out after the calcining slaking the good material of unreacted in the mixture;
Broken: the oversize material that slaking is good is broken into 3-8 purpose small-particle;
Leaching: the slaking material after the fragmentation is put into water soak, stir, precipitation, the slagging-off back obtains chromium acid sodium solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100155549A CN101066779B (en) | 2007-05-24 | 2007-05-24 | Process of preparing sodium chromate product without calcium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100155549A CN101066779B (en) | 2007-05-24 | 2007-05-24 | Process of preparing sodium chromate product without calcium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101066779A CN101066779A (en) | 2007-11-07 |
| CN101066779B true CN101066779B (en) | 2010-09-08 |
Family
ID=38879501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100155549A Expired - Fee Related CN101066779B (en) | 2007-05-24 | 2007-05-24 | Process of preparing sodium chromate product without calcium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101066779B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101717119B (en) * | 2009-11-23 | 2012-06-06 | 新疆沈宏集团股份有限公司 | Method for producing sodium chromate by roasting chromium ore and small amount of soda |
| CN102849796B (en) * | 2012-09-24 | 2014-04-02 | 四川省银河化学股份有限公司 | Liquid phase leaching method of chromite or chromium-iron calcined molten salt |
-
2007
- 2007-05-24 CN CN2007100155549A patent/CN101066779B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101066779A (en) | 2007-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107935555B (en) | Nickel iron slag ceramic and preparation method thereof | |
| CN101028935B (en) | Method for extracting aluminum hydrate or alumina from coal gangue and method for producing cement from fag end | |
| CN103663396B (en) | Utilize the pelletizing method of mid low grade phosphate rock or ground phosphate rock | |
| CN101028936B (en) | Method for extracting alumin from aluminous fly-ash and method for producing cement from fag end | |
| CN103288426A (en) | Method for preparing special fracturing propping agent for shale gas by utilizing industrial waste | |
| CN108275899A (en) | A kind of alkali-excited cement and preparation method thereof | |
| CN101591150A (en) | A kind of method of utilizing silico-calcium slag and carbide slag to produce silicate cement | |
| CN103332879A (en) | Preparation method of cheap single-component alkali-activated cement and application method thereof | |
| CN102295467B (en) | Method for preparing light ceramic particle from pyrite cinder | |
| CN107640917A (en) | A kind of preparation method of high intensity foam cement | |
| CN101066779B (en) | Process of preparing sodium chromate product without calcium | |
| CN106350632B (en) | Pneumatic steelmaking light-burned pressure ball and preparation method thereof | |
| CN107056202A (en) | Carbonization slag cement prepares accelerator and its application process of low-carbon binder materials | |
| CN101503758B (en) | Vanadium ore oxidizing roast composite additive and vanadium ore calcination method | |
| CN103553572A (en) | Electrolytic manganese waste slag sintered building brick and preparation method thereof | |
| CN101279839A (en) | Solid wall insulating brick made by calcining fly ash coal gangue | |
| CN114716193B (en) | Preparation method of recycled slag-soil brick | |
| CN102838303A (en) | Method for preparing cement by nickel-chromium residue | |
| CN113955958B (en) | Environment-friendly high-strength cement and preparation method thereof | |
| CN110078392A (en) | Utilize the method for discarded sintering shale brick powder production ecotype cement | |
| CN102173834B (en) | Roller kiln white backing plate and processing method thereof | |
| CN108640634A (en) | A kind of method that blast furnace ash inorganic materials lightweight gas steams brick | |
| CN100999392A (en) | Preparation method of silicate cement clinker | |
| CN113480212A (en) | Coal gangue direct-combustion activation process and preparation process of geopolymer | |
| CN1280228C (en) | Full fly ash building brick and its manufacturing method and special additive |
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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100908 Termination date: 20110524 |