CN1923710A - Method of preparing nickel protoxide by continuous drying and calcining - Google Patents
Method of preparing nickel protoxide by continuous drying and calcining Download PDFInfo
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- CN1923710A CN1923710A CN 200610140864 CN200610140864A CN1923710A CN 1923710 A CN1923710 A CN 1923710A CN 200610140864 CN200610140864 CN 200610140864 CN 200610140864 A CN200610140864 A CN 200610140864A CN 1923710 A CN1923710 A CN 1923710A
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Abstract
The invention discloses a preparing method of nickel oxide through drying and sintering mud-shaped nickel carbonate continuously, which is characterized by the following: mating rotary flashing drier and rotary dynamic sintering furnace; adopting liquid or gas fuel to blow in air to combust completely; proceeding dynamic drying for cream-shaped wet nickel carbonate; decomposing dried nickel carbonate into NiO powder under heat gas flow; recycling the heat gas flow; purifying tail gas to drain.
Description
Technical field
A kind of method of preparing nickel protoxide by continuous drying and calcining relates to a kind ofly the producing in the process of nonferrous metal oxides powder body material, and particularly mud shape nickelous carbonate successive drying, continuous calcining decompose the method for producing nickel protoxide.
Background technology
In the salt process of producing product of non-ferrous metal, the common preparation method of green powder nickel protoxide is: to purify nickel salt solution after qualified is that raw material carries out precipitin reaction with saturated sodium carbonate solution and generates wet nickelous carbonate.Take off sodium through washing and after the drying, the powdery nickelous carbonate is added external-heat again forge baker (external-heat crucible or external-heat tube furnace) in drying oven, the high-temperature calcination of carrying out 1150～1200 ℃ under anaerobic state generates the inferior nickel product of green oxidation.The material of crucible carries out hand mixing every for some time owing to pack into, flies upward loss greatly, and site work environment is very abominable, and productivity is very low.Adopt revolving tubular furnace, can only intermittent feed, can not reach anaerobic incinerating purpose, in production reality, be fit to corrosion-resistant, resistant to elevated temperatures metallic substance and do boiler tube.
Summary of the invention:
The objective of the invention is the deficiency that exists at above-mentioned prior art, provide a kind of can effectively the solution to fly upward that loss, site work environment are abominable, the method for the preparing nickel protoxide by continuous drying and calcining of the low problem of productivity.
The objective of the invention is to be achieved through the following technical solutions.
A kind of method of preparing nickel protoxide by continuous drying and calcining is characterized in that it being that the wet nickelous carbonate of paste is dynamically dry continuously in low-temperature airflow, the dried nickelous carbonate of dried powdery is added continuously carry out dynamic calcining, the continuous production nickel protoxide in the high temperature gas flow.
The method of a kind of preparing nickel protoxide by continuous drying and calcining of the present invention is characterized in that preparation process adopts eddy flow dynamic calcining stove and Rotatingandflashstreamingdrier; With 1100～1200 ℃ the elevated temperature heat air-flow that eddy flow dynamic calcining fire grate goes out, after air-cooled interchanger makes gas flow temperature reduce to 500～700 ℃, introduce Rotatingandflashstreamingdrier, the speed of control air-flow 18～20m/s is carried out dynamic exsiccant to the wet nickelous carbonate of paste.
The method of a kind of preparing nickel protoxide by continuous drying and calcining of the present invention is characterized in that it being to adopt eddy flow dynamic calcining stove, and nickelous carbonate is the moment decomposition in 1200～1400 ℃ of elevated temperature heat air-flows, generates NiO and CO
2Adopt cyclonic separator, the NiO solid powder is separated with hot gas flow.
The method of a kind of preparing nickel protoxide by continuous drying and calcining of the present invention, it is characterized in that it being to have separated the hot gas flow of NiO, through air-cooled interchanger, control 500～700 ℃ temperature and the speed of air-flow 18～20m/s, hot gas flow is added Rotatingandflashstreamingdrier, the paste nickelous carbonate is dried up under dynamically, and in the cyclonic separator of drying machine tail end, separate, the dried nickelous carbonate of collecting enters eddy flow dynamic calcining stove, and tail gas is through purifying the back emptying.
Method of the present invention adopts liquid or gaseous fuel, makes the oxygen level that no longer includes carbon distribution, carbon monoxide or be imbued with in the air-flow after the burning, and dried nickelous carbonate moment in 1200～1400 ℃ of elevated temperature heat air-flows is decomposed, and generates NiO and CO
2Method of the present invention can greatly be improved the labor operation environment, raises labour productivity, and the final product granularity reaches more than 200 orders.The chemical ingredients of product and appearance luster uniformity have satisfied user's requirement.
Description of drawings
Fig. 1 is the process flow sheet of the inventive method
Embodiment
A kind of method of preparing nickel protoxide by continuous drying and calcining, Rotatingandflashstreamingdrier and the organic connection of eddy flow dynamic calcining stove are cooperated, adopt liquid or gaseous fuel to blast air perfect combustion, the high-temperature tail gas that utilizes 1100～1200 ℃ of calcining backs is after air-cooled interchanger makes gas flow temperature reduce to 500～700 ℃, in negative pressure is drawn to drying machine, the speed of control air-flow 18～20m/s is carried out dynamic drying to the wet nickelous carbonate of paste.The moment decomposition in 1200～1400 ℃ elevated temperature heat air-flow of dried dried nickelous carbonate generates NiO solid powder and hot gas flow, the hot gas flow second stage employ, and tail gas is through purifying the back emptying.
Embodiment 1
In eddy flow dynamic calcining stove, adopted diesel oil to blast air perfect combustion utilization and calcined back 1100 ℃ high-temperature tail gas after air-cooled interchanger makes gas flow temperature reduce to 500 ℃ as fuel, in negative pressure is drawn to drying machine, the speed of control air-flow 18m/s is carried out dynamic drying to the wet nickelous carbonate of paste; With dried dried carbonic acid nickel powder from the body of heater sidepiece adds in the stove 1200 ℃ high temperature gas flow continuously, the speed of control air-flow 18m/s, make dried carbonic acid nickel powder be in suspended state, after the moment calcining and decomposing, tangentially enter in the other finished product cyclonic separator of stove top side, isolated powder nickel protoxide product per hour discharges once, the powder nickel protoxide is through subsequent disposal, and row is packed again.Reduce to 500 ℃ and enter air-flow temperature after cold exchange of revolving the branch separator, its tangential direction along Rotatingandflashstreamingdrier is added in the body, mixed with wet nickelous carbonate in the dynamic adding machine down, drive material and prolong the relief outlet that the body rotation rises to the top, enter cyclonic separator again and isolate dried carbonic acid nickel powder, add in the calcining furnace continuously.Emptying after isolated gas gathers dust through the spray scrubber gas washing.
Embodiment 2
In eddy flow dynamic calcining stove, adopted diesel oil to blast air perfect combustion utilization and calcined back 1150 ℃ high-temperature tail gas after air-cooled interchanger makes gas flow temperature reduce to 600 ℃ as fuel, in negative pressure is drawn to drying machine, the speed of control air-flow 19m/s is carried out dynamic drying to the wet nickelous carbonate of paste; With dried dried carbonic acid nickel powder from the body of heater sidepiece adds in the stove 1300 ℃ high temperature gas flow continuously, the speed of control air-flow 19m/s, make dried carbonic acid nickel powder be in suspended state, after the moment calcining and decomposing, tangentially enter in the other finished product cyclonic separator of stove top side, isolated powder nickel protoxide product per hour discharges once, the powder nickel protoxide is through subsequent disposal, and row is packed again.Reduce to 600 ℃ and enter air-flow temperature after cold exchange of revolving the branch separator, its tangential direction along Rotatingandflashstreamingdrier is added in the body, mixed with wet nickelous carbonate in the dynamic adding machine down, drive material and prolong the relief outlet that the body rotation rises to the top, enter cyclonic separator again and isolate dried carbonic acid nickel powder, add in the calcining furnace continuously.Emptying after isolated gas gathers dust through the spray scrubber gas washing.
Embodiment 3
In eddy flow dynamic calcining stove, adopted diesel oil to blast air perfect combustion utilization and calcined back 1200 ℃ high-temperature tail gas after air-cooled interchanger makes gas flow temperature reduce to 700 ℃ as fuel, in negative pressure is drawn to drying machine, the speed of control air-flow 20m/s is carried out dynamic drying to the wet nickelous carbonate of paste; With dried dried carbonic acid nickel powder from the body of heater sidepiece adds in the stove 1400 ℃ high temperature gas flow continuously, the speed of control air-flow 20m/s, make dried carbonic acid nickel powder be in suspended state, after the moment calcining and decomposing, tangentially enter in the other finished product cyclonic separator of stove top side, isolated powder nickel protoxide product per hour discharges once, the powder nickel protoxide is through subsequent disposal, and row is packed again.Reduce to 700 ℃ and enter air-flow temperature after cold exchange of revolving the branch separator, its tangential direction along Rotatingandflashstreamingdrier is added in the body, mixed with wet nickelous carbonate in the dynamic adding machine down, drive material and prolong the relief outlet that the body rotation rises to the top, enter cyclonic separator again and isolate dried carbonic acid nickel powder, add in the calcining furnace continuously.Emptying after isolated gas gathers dust through the spray scrubber gas washing.
Claims (4)
1. the method for a preparing nickel protoxide by continuous drying and calcining, it is characterized in that it being that the wet nickelous carbonate of paste is dynamically dry continuously in low-temperature airflow, the dried nickelous carbonate of dried powdery added continuously carry out dynamic calcining, the continuous production nickel protoxide in the high temperature gas flow.
2. the method for a kind of preparing nickel protoxide by continuous drying and calcining according to claim 1 is characterized in that preparation process adopts Rotatingandflashstreamingdrier and eddy flow dynamic calcining stove; With 1100～1200 ℃ the elevated temperature heat air-flow that eddy flow dynamic calcining fire grate goes out, after air-cooled interchanger makes gas flow temperature reduce to 500～700 ℃, introduce Rotatingandflashstreamingdrier, the speed of control air-flow 18～20m/s is carried out dynamic exsiccant to the wet nickelous carbonate of paste.
3. the method for a kind of preparing nickel protoxide by continuous drying and calcining according to claim 1 is characterized in that it being to adopt eddy flow dynamic calcining stove, with nickelous carbonate moment decomposition in 1200～1400 ℃ of elevated temperature heat air-flows, generates NiO and CO
2Adopt cyclonic separator, the NiO solid powder is separated with hot gas flow.
4. the method for a kind of preparing nickel protoxide by continuous drying and calcining according to claim 1, it is characterized in that it being to have separated the hot gas flow of NiO, through air-cooled interchanger, control 500～700 ℃ temperature and the speed of air-flow 18～20m/s, hot gas flow is added Rotatingandflashstreamingdrier, the paste nickelous carbonate is dried up under dynamically, and in the cyclonic separator of drying machine tail end, separate, the dried nickelous carbonate of collecting enters eddy flow dynamic calcining stove, and tail gas is through purifying the back emptying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610140864 CN1923710A (en) | 2006-10-13 | 2006-10-13 | Method of preparing nickel protoxide by continuous drying and calcining |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610140864 CN1923710A (en) | 2006-10-13 | 2006-10-13 | Method of preparing nickel protoxide by continuous drying and calcining |
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| CN1923710A true CN1923710A (en) | 2007-03-07 |
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| CN 200610140864 Pending CN1923710A (en) | 2006-10-13 | 2006-10-13 | Method of preparing nickel protoxide by continuous drying and calcining |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018826A (en) * | 2015-07-24 | 2015-11-04 | 金川集团股份有限公司 | Method for increasing direct recovery rate of nickel protoxide added in stainless steel smelting |
| CN106904577A (en) * | 2017-03-21 | 2017-06-30 | 西北工业大学 | A kind of powder prepares high temperature gas flow impact thermal decomposition processing method and its device |
| CN108706640A (en) * | 2018-07-13 | 2018-10-26 | 金川集团股份有限公司 | A kind of preparation method of nickel oxide powder material |
| CN111592054A (en) * | 2020-06-11 | 2020-08-28 | 兰州理工大学 | Method for preparing nickel protoxide by low-temperature calcination and low-temperature washing impurity removal method |
-
2006
- 2006-10-13 CN CN 200610140864 patent/CN1923710A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105018826A (en) * | 2015-07-24 | 2015-11-04 | 金川集团股份有限公司 | Method for increasing direct recovery rate of nickel protoxide added in stainless steel smelting |
| CN105018826B (en) * | 2015-07-24 | 2017-02-01 | 金川集团股份有限公司 | Method for increasing direct recovery rate of nickel protoxide added in stainless steel smelting |
| CN106904577A (en) * | 2017-03-21 | 2017-06-30 | 西北工业大学 | A kind of powder prepares high temperature gas flow impact thermal decomposition processing method and its device |
| CN108706640A (en) * | 2018-07-13 | 2018-10-26 | 金川集团股份有限公司 | A kind of preparation method of nickel oxide powder material |
| CN111592054A (en) * | 2020-06-11 | 2020-08-28 | 兰州理工大学 | Method for preparing nickel protoxide by low-temperature calcination and low-temperature washing impurity removal method |
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