CN110052473A - A kind of heavy metal chromium pollution processing method - Google Patents
A kind of heavy metal chromium pollution processing method Download PDFInfo
- Publication number
- CN110052473A CN110052473A CN201910305895.2A CN201910305895A CN110052473A CN 110052473 A CN110052473 A CN 110052473A CN 201910305895 A CN201910305895 A CN 201910305895A CN 110052473 A CN110052473 A CN 110052473A
- Authority
- CN
- China
- Prior art keywords
- chromium
- chromium slag
- mixture
- heavy metal
- sent
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B1/00—Dumping solid waste
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Abstract
The invention belongs to heavy metal pollution processing technology fields, disclose a kind of heavy metal chromium pollution processing method, comprising the following steps: chromium slag is sent into crusher and is crushed by (a)；(b) broken chromium slag is sent into pulverizer and is crushed；(c) carbonaceous mixture is added in smashed chromium slag；The chromium slag accounts for the 5%~15% of mixture total weight；(d) mixture is sent into cyclone furnace and carries out reduction calcining；Calcination temperature is 900 DEG C~1700 DEG C；(e) it calcined mixture will be restored rapidly is sprayed through cooling water and gathered dust and dedusting, be cooled to 160 DEG C~260 DEG C；(f) it is gathering dust with the temperature after addition FeSO4 in the mixture after dedusting less than 45 DEG C, formation can fill chromium slag；(g) chromium slag can be filled and carry out landfill disposal.The present invention can be good at reducing pollution of chromium processing cost, can guarantee the detoxifying effect of chromium slag；It is thorough that the invention enables chromium residue detoxifyings, and residue is avoided to cause secondary pollution.
Description
Technical field
The invention belongs to heavy metal pollution processing technology field more particularly to a kind of heavy metal chromium pollution processing methods.
Background technique
Chromic salts is important one of inorganic chemical product, is widely used in advanced total material, plating, printing and dyeing, anti-corrosion
Etc. multiple fields, be one of 8 kinds of resource raw materials most competitive in the world, and the annual demand in China alreadys exceed
200,000 tons.
Although chromic salts has competitiveness very much, the chromium slag generated in process of production is main in the world at present again
One of heavy industries pollution sources, wherein being again most with Cr (VI).Cr (VI) compound has very strong oxidisability, Neng Goutong
It crosses alimentary canal and skin enters human body, lead to a variety of diseases；And for water-solubility Cr (VI) after rainwater shower, meeting is deep in chromium slag
Enter underground, polluted underground water.The composition of chromium slag depends primarily on the place of production, taste and the filler formulation grade production technology of chromite.
Contained a small amount of calcium chromate is classified as the substance for sufficiently confirming to have animal carcinogenicity by international cancer survey institute in chromium slag；When
Only have Cr (VI) ion of a few millionths that its distinctive bright yellow can be presented in water body, easily causes environment drastic change and society
It can be panic.Therefore, it is not only China, international community all pays much attention to the serious pollution of chromium slag.
Currently, chromium slag contaminated improvement specifically includes that the removing toxic substances and comprehensive utilization of chromium slag；The improvement of chromium slag contaminated soil；
The improvement etc. of pollution of chromium underground water.Wherein, Cr (VI) is mainly separated and is reduced into Cr (III) or form Cr by the removing toxic substances of chromium slag
(VI) salt precipitates, and endangers environment to avoid it.Current mainstream control measures are to convert Cr (III) for Cr (VI) to fill out again
It buries.It is usually sterilized using wet process, the content of CaO and MgO is high in chromium slag, alkalinity is strong, and it is big to be neutralized to sour institute's acid consumption, leads to medicine
The operating cost of agent cost is high；Also, wet method detoxifcation is not thorough, and chromium slag stability is poor after removing toxic substances, is easy to appear " brightness reversion " phenomenon.
Summary of the invention
To solve the above-mentioned problems, the invention discloses a kind of heavy metal chromium pollution processing method, can be good at reducing
The cost of pollution of chromium processing, and can guarantee the detoxifying effect of chromium slag；It is thorough that the invention enables chromium residue detoxifyings, and residue is avoided to cause
Secondary pollution.The specific technical solution of the present invention is as follows:
A kind of heavy metal chromium pollution processing method, comprising the following steps:
(a) chromium slag is sent into crusher and is crushed, and be crushed to 50 mesh or more；
(b) broken chromium slag is sent into pulverizer and is crushed, and be crushed to 170 mesh or more；
(c) carbonaceous mixture being made of coal, clinker and sawdust is added in smashed chromium slag；The chromium slag accounts for mixing
The 5%~15% of object gross weight；
(d) mixture is sent into cyclone furnace and carries out reduction calcining；Calcination temperature is 900 DEG C~1700 DEG C；In cyclone furnace
Wind parameter are as follows: primary air ratio 13%~20%, wind speed 28m/s~38m/s；Secondary air ratio 75%~85%, wind speed 128m/s
~160m/s；Tertiary air rate 3%~10%, wind speed 28m/s~40m/s；
(e) calcined mixture will be restored rapidly sprayed through cooling water and gathered dust and dedusting, be cooled to 160 DEG C~
260℃；
(f) gather dust and in the mixture after dedusting be added FeSO4 after temperature less than 45 DEG C, formation can fill chromium slag；
(g) chromium slag can be filled and carry out landfill disposal.
The utility model has the advantages that chromium slag to be crushed and be crushed, calcination reaction can be made fiercer, add calcination process again
It is whole；In calcination process, due to the presence of the carbonaceous materials such as coal, clinker and sawdust, enable C and CO as reducing agent very
Good is reduced to Cr (III) for Cr (VI)；In general, it should be ensured that the concentration of CO is not less than 0.55%, O2Concentration be not more than
7%；At this point, reduction rate is accelerated, and 1250 DEG C can all restore, more than 1550 when the temperature in cyclone furnace is at 850 DEG C or more
DEG C it can be reduced to ferrochrome；It gathers dust with the mixture of dedusting by rapid cooling, and mixes FeSO4Can when the condition of high temperature
Cr (III) keeps reducing condition, and back reaction is avoided to be oxidized to Cr (VI) again.
Preferably, further include being collected the flying dust in cyclone furnace by dust-extraction unit in the step (d), will collect
To flying dust be fed again into cyclone furnace carry out reduction calcining the step of.
The utility model has the advantages that may carry out reduction again containing the Cr (VI) not being reduced, by collecting in flying dust to flying dust and forge
It burns, goes out air also to avoid flying dust to cause secondary pollution.
Preferably, the step (d) further includes that the gas comburant after dedusting is sent into the circulating filtration containing quick lime
The step of device, progress desulfurization process.
The utility model has the advantages that due to joined the carbonaceous materials such as coal, clinker and sawdust in the calcination process of chromium slag, so difficult
Exempt to generate SO2；For SO2For, this is the major pollutants of atmosphere pollution, how to reduce SO in the industrial production2It is also current
The task of top priority that atmospheric environment is administered；And desulfurization is main processing mode after burning；The present invention uses calcium method, can be good at
Quick lime is set to adsorb SO2, to accomplish desulfurization.
Preferably, in the step (d), air-flow is sent into from the middle part of cyclone furnace, and wherein Secondary Air is tangentially sent into.
The utility model has the advantages that mixture can be made to carry out in the front-end and back-end of cyclone furnace sufficient when air-flow is sent into from middle part
Combustion reaction；Such setting can be very good to avoid the race way of outer gas flow close to whirlwind ditch；Also following for outer gas flow is avoided
Ring region moves on to cyclone furnace front end；Successively avoid the burning of mixture insufficient.
Preferably, the step (g) further include it is described can fill chromium slag after landfill disposal, planted in the ground of its landfill
The step of Leersia Sw or dandelion.
The utility model has the advantages that chromium slag is also possible to slowly be aoxidized by the oxygen in soil after filling chromium slag；After study, Li Shi
Averagely 1786.9mg/kg containing chromium in standing grain blade, rhizome also detect the chromium of very high-content；Accumulation of the root of dandelion to chromium
At most, up to 3227.0mg/kg；So being accumulated using Leersia Sw and dandelion to chromium, chromium is enriched with to the spy of plant
Position is determined, after plant maturation, so that it may in a manner of gathering in plant, again handle heavy metal.
Preferably, in the step (c), chromium slag accounts for the 8%~12% of mixture total weight.
The utility model has the advantages that when chromium slag accounts for the 8%~12% of mixture, burning can be more abundant, it is preferred that when chromium slag account for it is mixed
When closing the 10% of object, so that it may ensure the adequacy restored.
Preferably, in the step (d), calcination temperature is 980 DEG C~1000 DEG C.
The utility model has the advantages that reduction rate is accelerated, and 1250 DEG C can all restore when the temperature in cyclone furnace is at 850 DEG C or more,
Ferrochrome can be reduced to more than 1550 DEG C；When calcination temperature reaches 980 DEG C, meet calcining reduction condition enough,
And it controls at 980 DEG C, can be avoided energy waste.
Preferably, in the step (e), the temperature after mixture addition FeSO4 is less than 42 DEG C.
The utility model has the advantages that can guarantee reduction effect with cooling water dedusting, in spraying cooling, a large amount of water can be generated and steamed
Gas does not have also the carbon of reaction to react with water under the high temperature conditions to completely cut off air, and in mixture, generates water-gas, adds in conjunction with new
The FeSO entered4, also have further reduction to the Cr (VI) not restored thoroughly.
Preferably, the weight ratio of the coal, clinker and sawdust is 10:1:3.
The utility model has the advantages that the coal of the weight ratio, clinker and sawdust can produce suitable C and CO in cyclone furnace, to protect
Card reduction reaction is normally carried out.
Compared to the prior art, the present invention provides a kind of methods of calcining reduction chromium, by the way that coal, clinker and saw is added
The carbonaceous materials such as end are in calcination process in the environment of C and CO, make Cr (VI) that can be reduced to Cr (III)；Once going back
After original, the present invention is provided with dust-extraction unit, can recycle flying dust into cyclone furnace and carry out secondary reduction, to prevent Cr (VI) from stealing
It runs；In last filtration stage, the present invention is provided with quick lime filter layer, can complete desulfurization process, can further protect big
Compression ring border.
Specific embodiment
The present invention is further elaborated combined with specific embodiments below.
Embodiment 1
A kind of heavy metal chromium pollution processing method, comprising the following steps:
(a) chromium slag is sent into crusher and is crushed, and be crushed to 50 mesh；
(b) broken chromium slag is sent into pulverizer and is crushed, and be crushed to 170 mesh；
(c) carbonaceous mixture being made of coal, clinker and sawdust is added in smashed chromium slag；The chromium slag accounts for mixing
The 8% of object gross weight, wherein the weight ratio of the coal, clinker and sawdust is 10:1:3；
(d) mixture is sent into cyclone furnace and carries out reduction calcining；Calcination temperature is 980 DEG C；Wind parameter in cyclone furnace
Are as follows: primary air ratio 16%, wind speed 32m/s；Secondary air ratio 80%, wind speed 142m/s；Tertiary air rate 8%, wind speed 30m/s；
After the completion of mixture is calcined for the first time, the flying dust in cyclone furnace is collected by dust-extraction unit, by what is be collected into
Flying dust is fed again into the step of cyclone furnace carries out reduction calcining；
It will be sent into the circulation filter containing quick lime by the gas comburant of dust-extraction unit, carries out desulfurization process；
Air-flow is sent into from the middle part of cyclone furnace, and wherein Secondary Air is tangentially sent into；
(e) it calcined mixture will be restored rapidly is sprayed through cooling water and gathered dust and dedusting, be cooled to 260 DEG C；
(f) it is gathering dust with after addition FeSO4 in the mixture after dedusting, is being cooled to 42 DEG C, formation can fill chromium slag；
(g) described to fill chromium slag after landfill disposal, in the ground of its landfill plantation Leersia Sw or dandelion.
Chromium slag is crushed and is crushed, calcination reaction can be made fiercer, adds calcination process again whole；It is calcining
In the process, due to the presence of the carbonaceous materials such as coal, clinker and sawdust, so that C and CO can be good at as reducing agent by Cr
(VI) it is reduced to Cr (III)；In general, it should be ensured that the concentration of CO is not less than 0.5%, O2Concentration be not more than 7%；At this point,
When the temperature in cyclone furnace is at 850 DEG C or more, reduction rate is accelerated, and 1250 DEG C can all restore, can be also more than 1550 DEG C
It originally is ferrochrome；It gathers dust with the mixture of dedusting by rapid cooling, and mixes FeSO4Can when the condition of high temperature Cr (III) protect
Reducing condition is held, back reaction is avoided to be oxidized to Cr (VI) again；Coal, clinker and the suitable weight ratio of sawdust can be in whirlwind
Furnace can produce suitable C and CO, to guarantee being normally carried out for reduction reaction；
In flying dust reduction again may be carried out to flying dust and calcined containing the Cr (VI) not being reduced, by collecting, to avoid
Flying dust goes out air also to cause secondary pollution；It is carbon containing due to joined coal, clinker and sawdust etc. in the calcination process of chromium slag
Substance, so inevitably generating SO2；For SO2For, this is the major pollutants of atmosphere pollution, how to be reduced in the industrial production
SO2It is also the task of top priority that current atmospheric environment is administered；And desulfurization is main processing mode after burning；The present invention uses calcium
Method can be good at that quick lime is made to adsorb SO2, to accomplish desulfurization；
When air-flow is sent into from middle part, mixture can be made to carry out sufficient combustion reaction in the front-end and back-end of cyclone furnace；
Such setting can be very good to avoid the race way of outer gas flow close to whirlwind ditch；Also the race way of outer gas flow is avoided to move on to rotation
Wind furnace front end；Successively avoid the burning of mixture insufficient；
When chromium slag accounts for the 8%~12% of mixture, burning can be more abundant, it is preferred that when chromium slag accounts for mixture
When 10%, so that it may ensure the adequacy restored；
When the temperature in cyclone furnace is at 850 DEG C or more, reduction rate is accelerated, and 1250 DEG C can all restore, more than 1550
DEG C it can be reduced to ferrochrome；When calcination temperature reaches 980 DEG C, meet calcining reduction condition enough, and control
At 980 DEG C, energy waste can be avoided；
It can guarantee reduction effect with cooling water dedusting, in spraying cooling, a large amount of vapor can be generated, to completely cut off sky
Gas, and also no the carbon of reaction is not reacted with water under the high temperature conditions in mixture, water-gas is generated, in conjunction with the FeSO being newly added4, right
The Cr (VI) not restored thoroughly also has further reduction；
After filling chromium slag, chromium slag is also possible to slowly be aoxidized by the oxygen in soil；After study, it is put down in Leersia Sw blade
1786.9mg/kg containing chromium, rhizome also detect the chromium of very high-content；The root of dandelion is most to the accumulation of chromium, can be high
Up to 3227.0mg/kg；So being accumulated using Leersia Sw and dandelion to chromium, chromium is enriched with to the privileged site of plant,
After plant maturation, so that it may in a manner of gathering in plant, again handle heavy metal.
The heavy metal chromium pollution processing method carried out through the invention, after Cr (VI) removing toxic substances that original content is 307mg/L only
0.076mg/L is deposited, handling rate reaches 99.99%, has reached the requirement of Ordinary solid waste landfill yard；In the ground kind of its landfill
Dandelion is further handled Cr (VI).
In the present invention, also settable several sensors in cyclone furnace, for monitoring CO content and O2Content, when detecting
CO content it is too low when, the reduction effect in cyclone furnace is not thorough enough, needs to add coal, clinker and saw into cyclone furnace at this time
The carbonaceous materials such as end；When the CO too high levels monitored, CO will affect the combustion efficiency in cyclone furnace, keep burning not thorough enough,
It will form a large amount of flying dusts, at this time sustainable addition chromium slag；As the O of detection2When content is too low, burning is not thorough in cyclone furnace, is needed
It to be passed through air, more to increase O2Content；As detection O2When too high levels, CO is excessively oxidized to CO2, and be not because
CO is obtained for reduction Cr (VI)2, so that cannot reach the present invention thinks effect to be achieved, at this point it is possible to it is continuously added into mixture,
To guarantee O2Burning may greatly will increase CO and CO if the carbonaceous materials such as coal, clinker and sawdust are only added2Content,
Finally inhibit calcining effect.In the actual process, it needs to monitor O simultaneously2And CO2Content, guarantee that the concentration of CO is not less than
0.5%, O2Concentration less than 6.5%.
Embodiment 2
A kind of heavy metal chromium pollution processing method, comprising the following steps:
(a) chromium slag is sent into crusher and is crushed, and be crushed to 60 mesh；
(b) broken chromium slag is sent into pulverizer and is crushed, and be crushed to 180 mesh；
(c) carbonaceous mixture being made of coal, clinker and sawdust is added in smashed chromium slag；The chromium slag accounts for mixing
The 9% of object gross weight, wherein the weight ratio of the coal, clinker and sawdust is 10:1:3；
(d) mixture is sent into cyclone furnace and carries out reduction calcining；Calcination temperature is 990 DEG C；Wind parameter in cyclone furnace
Are as follows: primary air ratio 16%, wind speed 32m/s；Secondary air ratio 80%, wind speed 142m/s；Tertiary air rate 8%, wind speed 30m/s；
After the completion of mixture is calcined for the first time, the flying dust in cyclone furnace is collected by dust-extraction unit, by what is be collected into
Flying dust is fed again into the step of cyclone furnace carries out reduction calcining；
It will be sent into the circulation filter containing quick lime by the gas comburant of dust-extraction unit, carries out desulfurization process；
Air-flow is sent into from the middle part of cyclone furnace, and wherein Secondary Air is tangentially sent into；
(e) it calcined mixture will be restored rapidly is sprayed through cooling water and gathered dust and dedusting, be cooled to 240 DEG C；
(f) it is gathering dust with after addition FeSO4 in the mixture after dedusting, is being cooled to 40 DEG C, formation can fill chromium slag；
(g) described to fill chromium slag after landfill disposal, in the ground of its landfill plantation Leersia Sw or dandelion.
The heavy metal chromium pollution processing method carried out through the invention, after Cr (VI) removing toxic substances that original content is 320mg/L only
0.052mg/L is deposited, handling rate reaches 99.99%, has reached the requirement of Ordinary solid waste landfill yard；In the ground kind of its landfill
Leersia Sw is planted, is further handled Cr (VI).
Embodiment 3
A kind of heavy metal chromium pollution processing method, comprising the following steps:
(a) chromium slag is sent into crusher and is crushed, and be crushed to 70 mesh；
(b) broken chromium slag is sent into pulverizer and is crushed, and be crushed to 190 mesh or more；
(c) carbonaceous mixture being made of coal, clinker and sawdust is added in smashed chromium slag；The chromium slag accounts for mixing
The 10% of object gross weight, wherein the weight ratio of the coal, clinker and sawdust is 10:1:3；
(d) mixture is sent into cyclone furnace and carries out reduction calcining；Calcination temperature is 980 DEG C；Wind parameter in cyclone furnace
Are as follows: primary air ratio 16%, wind speed 32m/s；Secondary air ratio 80%, wind speed 142m/s；Tertiary air rate 8%, wind speed 30m/s；
After the completion of mixture is calcined for the first time, the flying dust in cyclone furnace is collected by dust-extraction unit, by what is be collected into
Flying dust is fed again into the step of cyclone furnace carries out reduction calcining；
It will be sent into the circulation filter containing quick lime by the gas comburant of dust-extraction unit, carries out desulfurization process；
Air-flow is sent into from the middle part of cyclone furnace, and wherein Secondary Air is tangentially sent into；
(e) it calcined mixture will be restored rapidly is sprayed through cooling water and gathered dust and dedusting, be cooled to 200 DEG C；
(f) it is gathering dust with after addition FeSO4 in the mixture after dedusting, is being cooled to 38 DEG C, formation can fill chromium slag；
(g) described to fill chromium slag after landfill disposal, in the ground of its landfill plantation Leersia Sw or dandelion.
The heavy metal chromium pollution processing method carried out through the invention, after Cr (VI) removing toxic substances that original content is 297mg/L only
0.027mg/L is deposited, handling rate reaches 99.99%, has reached the requirement of Ordinary solid waste landfill yard；In the ground kind of its landfill
Leersia Sw is planted, is further handled Cr (VI).
Embodiment 4
A kind of heavy metal chromium pollution processing method, comprising the following steps:
(a) chromium slag is sent into crusher and is crushed, and be crushed to 50 mesh；
(b) broken chromium slag is sent into pulverizer and is crushed, and be crushed to 190 mesh；
(c) carbonaceous mixture being made of coal, clinker and sawdust is added in smashed chromium slag；The chromium slag accounts for mixing
The 11% of object gross weight, wherein the weight ratio of the coal, clinker and sawdust is 10:1:3；
(d) mixture is sent into cyclone furnace and carries out reduction calcining；Calcination temperature is 1000 DEG C；Wind parameter in cyclone furnace
Are as follows: primary air ratio 16%, wind speed 32m/s；Secondary air ratio 80%, wind speed 142m/s；Tertiary air rate 8%, wind speed 30m/s；
After the completion of mixture is calcined for the first time, the flying dust in cyclone furnace is collected by dust-extraction unit, by what is be collected into
Flying dust is fed again into the step of cyclone furnace carries out reduction calcining；
It will be sent into the circulation filter containing quick lime by the gas comburant of dust-extraction unit, carries out desulfurization process；
Air-flow is sent into from the middle part of cyclone furnace, and wherein Secondary Air is tangentially sent into；
(e) it calcined mixture will be restored rapidly is sprayed through cooling water and gathered dust and dedusting, be cooled to 180 DEG C；
(f) it is gathering dust with after addition FeSO4 in the mixture after dedusting, is being cooled to 42 DEG C, formation can fill chromium slag；
(g) described to fill chromium slag after landfill disposal, in the ground of its landfill plantation Leersia Sw or dandelion.
The heavy metal chromium pollution processing method carried out through the invention, after Cr (VI) removing toxic substances that original content is 102mg/L only
0.005mg/L is deposited, handling rate reaches 99.99%, has reached the requirement of Ordinary solid waste landfill yard；In the ground kind of its landfill
Dandelion is further handled Cr (VI).
Embodiment 5
A kind of heavy metal chromium pollution processing method, comprising the following steps:
(a) chromium slag is sent into crusher and is crushed, and be crushed to 60 mesh；
(b) broken chromium slag is sent into pulverizer and is crushed, and be crushed to 180 mesh；
(c) carbonaceous mixture being made of coal, clinker and sawdust is added in smashed chromium slag；The chromium slag accounts for mixing
The 12% of object gross weight, wherein the weight ratio of the coal, clinker and sawdust is 10:1:3；
(d) mixture is sent into cyclone furnace and carries out reduction calcining；Calcination temperature is 1000 DEG C；Wind parameter in cyclone furnace
Are as follows: primary air ratio 16%, wind speed 32m/s；Secondary air ratio 80%, wind speed 142m/s；Tertiary air rate 8%, wind speed 30m/s；
After the completion of mixture is calcined for the first time, the flying dust in cyclone furnace is collected by dust-extraction unit, by what is be collected into
Flying dust is fed again into the step of cyclone furnace carries out reduction calcining；
It will be sent into the circulation filter containing quick lime by the gas comburant of dust-extraction unit, carries out desulfurization process；
Air-flow is sent into from the middle part of cyclone furnace, and wherein Secondary Air is tangentially sent into；
(e) it calcined mixture will be restored rapidly is sprayed through cooling water and gathered dust and dedusting, be cooled to 160 DEG C；
(f) it is gathering dust with after addition FeSO4 in the mixture after dedusting, is being cooled to 38 DEG C, formation can fill chromium slag；
(g) described to fill chromium slag after landfill disposal, in the ground of its landfill plantation Leersia Sw or dandelion.
The heavy metal chromium pollution processing method carried out through the invention, after Cr (VI) removing toxic substances that original content is 198mg/L only
0.019mg/L is deposited, handling rate reaches 99.99%, has reached the requirement of Ordinary solid waste landfill yard；In the ground kind of its landfill
Dandelion is further handled Cr (VI).
The present invention is not limited to above-mentioned optional embodiment, anyone can show that other are various under the inspiration of the present invention
The product of form, however, make any variation in its shape or structure, it is all to fall into the claims in the present invention confining spectrum
Technical solution, be within the scope of the present invention.
Claims (9)
1. a kind of heavy metal chromium pollution processing method, which comprises the following steps:
(a) chromium slag is sent into crusher and is crushed, and be crushed to 50 mesh or more；
(b) broken chromium slag is sent into pulverizer and is crushed, and be crushed to 170 mesh or more；
(c) carbonaceous mixture being made of coal, clinker and sawdust is added in smashed chromium slag；It is total that the chromium slag accounts for mixture
The 5%~15% of weight；
(d) mixture is sent into cyclone furnace and carries out reduction calcining；Calcination temperature is 900 DEG C~1700 DEG C；Wind in cyclone furnace
Parameter are as follows: primary air ratio 13%~20%, wind speed 28m/s~38m/s；Secondary air ratio 75%~85%, wind speed 128m/s~
160m/s；Tertiary air rate 3%~10%, wind speed 28m/s~40m/s；
(e) it calcined mixture will be restored rapidly is sprayed through cooling water and gathered dust and dedusting, be cooled to 160 DEG C~260 DEG C；
(f) it is gathering dust with the temperature after addition FeSO4 in the mixture after dedusting less than 45 DEG C, formation can fill chromium slag；
(g) chromium slag can be filled and carry out landfill disposal.
2. a kind of heavy metal chromium pollution processing method as described in claim 1, which is characterized in that also wrapped in the step (d)
Include and be collected the flying dust in cyclone furnace by dust-extraction unit, by the flying dust being collected into be fed again into cyclone furnace carry out reduction forge
The step of burning.
3. a kind of heavy metal chromium pollution processing method as claimed in claim 2, which is characterized in that the step (d) further includes,
The step of gas comburant after dedusting is sent into the circulation filter containing quick lime, carries out desulfurization process.
4. a kind of heavy metal chromium pollution processing method as described in claim 1, which is characterized in that in the step (d), air-flow
It is sent into from the middle part of cyclone furnace, wherein Secondary Air is tangentially sent into.
5. a kind of heavy metal chromium pollution processing method as described in claim 1, which is characterized in that the step (g) further includes
The chromium slag that fills is after landfill disposal, in the step of Leersia Sw or dandelion are planted in the ground of its landfill.
6. a kind of heavy metal chromium pollution processing method as described in claim 1, which is characterized in that in the step (c), chromium slag
Account for the 8%~12% of mixture total weight.
7. a kind of heavy metal chromium pollution processing method as described in claim 1, which is characterized in that in the step (d), calcining
Temperature is 980 DEG C~1000 DEG C.
8. a kind of heavy metal chromium pollution processing method as described in claim 1, which is characterized in that in the step (e), mixing
FeSO is added in object4Temperature afterwards is less than 42 DEG C.
9. a kind of heavy metal chromium pollution processing method as described in claim 1, which is characterized in that the coal, clinker and saw
The weight ratio at end is 10:1:3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910305895.2A CN110052473A (en) | 2019-04-16 | 2019-04-16 | A kind of heavy metal chromium pollution processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910305895.2A CN110052473A (en) | 2019-04-16 | 2019-04-16 | A kind of heavy metal chromium pollution processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110052473A true CN110052473A (en) | 2019-07-26 |
Family
ID=67317738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910305895.2A Pending CN110052473A (en) | 2019-04-16 | 2019-04-16 | A kind of heavy metal chromium pollution processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110052473A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10102132A (en) * | 1996-10-01 | 1998-04-21 | Nippon Steel Corp | Method for deoxidizing molten steel |
| CN1799716A (en) * | 2006-01-05 | 2006-07-12 | 赵建国 | Harmless treatment process for waste chromium slag |
| JP2007231372A (en) * | 2006-03-01 | 2007-09-13 | Nisshin Steel Co Ltd | Method for producing aluminum-killed steel |
| CN105039726A (en) * | 2015-07-07 | 2015-11-11 | 义马环保电力有限公司 | Chromium slag processing method |
| CN105772487A (en) * | 2016-04-29 | 2016-07-20 | 义马环保电力有限公司 | Chromium slag pollutant, environmental protection processing method of soil polluted by chromium slag pollutant, obtained product and application |
| CN107234125A (en) * | 2017-07-11 | 2017-10-10 | 中州大学 | A kind of process for handling toxic chromium slag |
| CN107417255A (en) * | 2017-09-12 | 2017-12-01 | 山东省科学院新材料研究所 | The recycling treatment Application way of chromium slag, tailings in vanadium extraction waste pollutant |
-
2019
- 2019-04-16 CN CN201910305895.2A patent/CN110052473A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10102132A (en) * | 1996-10-01 | 1998-04-21 | Nippon Steel Corp | Method for deoxidizing molten steel |
| CN1799716A (en) * | 2006-01-05 | 2006-07-12 | 赵建国 | Harmless treatment process for waste chromium slag |
| JP2007231372A (en) * | 2006-03-01 | 2007-09-13 | Nisshin Steel Co Ltd | Method for producing aluminum-killed steel |
| CN105039726A (en) * | 2015-07-07 | 2015-11-11 | 义马环保电力有限公司 | Chromium slag processing method |
| CN105772487A (en) * | 2016-04-29 | 2016-07-20 | 义马环保电力有限公司 | Chromium slag pollutant, environmental protection processing method of soil polluted by chromium slag pollutant, obtained product and application |
| CN107234125A (en) * | 2017-07-11 | 2017-10-10 | 中州大学 | A kind of process for handling toxic chromium slag |
| CN107417255A (en) * | 2017-09-12 | 2017-12-01 | 山东省科学院新材料研究所 | The recycling treatment Application way of chromium slag, tailings in vanadium extraction waste pollutant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107115840B (en) | Carbon-based composite material for repairing arsenic-cadmium contaminated soil and application thereof | |
| CN110240386A (en) | A kind of stalk cooperates with the devices and methods therefor of processing with sludge | |
| CN105347837B (en) | A kind of method that light ceramic is made using chromium-bearing sludge | |
| CN106244163A (en) | The reparation medicament of Compound Heavy Metals soil and methods for making and using same thereof | |
| CN110484267A (en) | A kind of mineral soil conditioner and preparation method thereof using flyash production | |
| CN102391878B (en) | Method for producing long-acting soil conditioning agent by using potassium feldspar and organic waste | |
| CN108726989A (en) | The cooperative processing method of waterworks sludge, flying ash and heavy metal sewage sludge | |
| CN103739184B (en) | Method for drying and direct blending combustion of domestic sludge by using dry-process cement kiln waste heat | |
| CN109369286B (en) | Method for producing medium trace element acid soil conditioner by using fly ash and product | |
| CN104152206A (en) | Recycling treatment method of fly ash, chromium slag and electroplating sludge dangerous waste | |
| CN105271624B (en) | A kind of method of cooperative disposal heavy metal sewage sludge | |
| CN105727881A (en) | Alkali-modified attapulgite adsorbing agent and preparing method thereof | |
| CN106753393A (en) | It is a kind of with potassium feldspar and the soil conditioner of carbide slag as primary raw material and preparation method thereof | |
| CN103740372A (en) | Fixing agent for repairing arsenic-polluted soil, and preparation and application method thereof | |
| CN108723074A (en) | A method of stabilizing restoration of soil polluted by heavy metal using sludge base charcoal ash | |
| CN110090845A (en) | A method of utilizing pyrite slag soil red mud | |
| CN105039726A (en) | Chromium slag processing method | |
| CN111777344B (en) | Method for treating waste incineration fly ash as admixture by cooperation of cement kiln | |
| CN105295930A (en) | Acid soil conditioner and preparation method thereof | |
| CN107902631A (en) | One kind utilizes hot carbon reduction ardealite coupling thermal activation potash feldspar ore CO2The method of co-production sulfur dioxide and potassium sulfate | |
| CN101323436A (en) | Method for reductively decomposion of ardealite by composite reducer | |
| CN102718422A (en) | Chemical waste liquid disposal system | |
| CN107164013A (en) | A kind of powder nanometer catalytically fixed sulphur agent and preparation method thereof of new type nonaqueous cement raw material | |
| CN109534846A (en) | The disposal of resources method and haydite of sludge and agriculture and forestry organic waste material | |
| CN110052473A (en) | A kind of heavy metal chromium pollution processing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190726 |