CN104131166A - Pollution-free treatment and recycling method of sludge generated during stainless steel acid washing process - Google Patents
Pollution-free treatment and recycling method of sludge generated during stainless steel acid washing process Download PDFInfo
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- CN104131166A CN104131166A CN201410322187.7A CN201410322187A CN104131166A CN 104131166 A CN104131166 A CN 104131166A CN 201410322187 A CN201410322187 A CN 201410322187A CN 104131166 A CN104131166 A CN 104131166A
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- rock wool
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- mud
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides a pollution-free treatment and recycling method of sludge generated during the stainless steel acid washing process. The method comprises the following steps: (1) condensing and filtering sludge generated during the acid washing process until the water content of the sludge is less than 10%; (2) leaching: adding concentrated sulfuric acid with a mass percentage of 98% into the filtered sludge to adjust the pH value of the sludge to 2 to 3, heating the sludge to 50 to 60 DEG C, stirring for 2 to 3 hours, and filtering the filtrate by using a press-filter; (3) reducing: adding NaHSO3 into the filtrate with a mole number which is 1.05 to 1.15 times as much as that of Cr<6+> to convert the Cr<6+> into Cr<3+>; (4) recycling chromium and nickel: adding NaOH into the filtrate with a mole number which is 1.1 times as much as the total mole number of Cr<6+> and Ni<2+>, filtering, and drying so as to obtain the metallurgy raw materials namely Cr(OH)3 and Ni(OH)2; (5) converting the filter slag into resources. The method saves the cost and reduces the environment pollution at the same time.
Description
technical field:
The present invention relates to the method that the pollution-free Treatment and recovery of a kind of acid-washing stainless steel mud utilizes, belong to three industrial wastes processing technology field.
background technology:
Stainless steel is in the cold rolling course of processing, because pickling, grinding etc. can produce a certain amount of solid waste.Mainly that pickling waste waters is processed the mud, the grinding mud etc. that form.In mud, contain chromium cpd, especially there is hypertoxic Cr6+ ion, therefore be subject to showing great attention to of the departments such as environmental protection, its processing is had to strict requirement, the main method adopting is first by its harmless treatment at present, then do antiseepage landfill disposal, because chromic toxicity is stronger, and can steady in a long-termly exist, antiseepage landfill can not thoroughly be eliminated the harm that chromium causes environment, take valuable land resources, increase processing cost, also cause nickel simultaneously, the waste of the resources such as chromium, therefore, exploring acid-washing stainless steel comprehensive utilization of mud has great importance.
summary of the invention:
The object of the invention is provides a kind of acid-washing stainless steel mud method that pollution-free Treatment and recovery utilizes for the problem of above-mentioned existence, can from acid-washing stainless steel mud, extract the noble metal of high added value, thereby effectively realize its economic worth; And the present invention is simple to operate and production cost is lower, obvious economic has reduced the pollution of environment when having saved cost.
Above-mentioned object is achieved through the following technical solutions:
The method of Treatment and recovery utilization that acid-washing stainless steel mud is pollution-free, the method comprises the steps:
(1) water content that concentrates, is filtered to pickling mud is not more than 10%;
(2) leach: be 98% the vitriol oil to adding mass percentage concentration in the mud after filtering, regulate the pH value of pickling mud at 2-3, and be heated to 50-60 DEG C of stirring 2-3 hour, then adopt Filter Press filtrate;
(3) reduction: add NaHS0 to filtrate
3, the 1.05-1.15 of the amount that the amount adding is Cr6+ mole doubly, is reduced into Cr3+ by Cr6+;
(4) chromium nickel resources: in filtrate, add Na0H, the amount adding be Cr6+, Ni2+ ion amount of substance and 1.1 times, after filtration, the dry Cr (OH) that obtains
3and Ni (OH)
2metallurgical raw material;
(5) filter residue resource utilization: will remain after tailings and coke mixing, and add in cupola furnace from furnace roof, and pass to combustion air in stove, residue tailings is melt into rock wool melt by the high temperature being produced by coke burning, makes rock wool raw material simultaneously.
The method that described acid-washing stainless steel mud is pollution-free Treatment and recovery utilizes, concentrated described in step (1) is to adopt center driving high-efficiency concentrator, described filtration adopts plate type pressure filter.
The method of Treatment and recovery utilization that described acid-washing stainless steel mud is pollution-free, the heating described in step (2) is to adopt steam heating.
The method of Treatment and recovery utilization that described acid-washing stainless steel mud is pollution-free, the acceleration step by step of making rock wool raw material and refer to the Centrifugal rolling that utilizes roll-type fiberizer described in step (5), by the rock wool melt flowing out from cupola furnace, in whizzer under the effect of centrifugal force, get rid of into rock wool fibers by stream thigh, then rock wool fibers is placed in the cotton collecting chamber of the cotton equipment of collection, there is movable conveying mesh bag in the bottom system of cotton collecting chamber, carry the below of mesh bag to be provided with wind chamber, in rock wool fibers, spray with vaporific vigorous knot agent, rock wool fibers is adsorbed on guipure surface by the negative pressure that relies on wind chamber to form, form rock wool raw material.
Beneficial effect:
The present invention can extract the noble metal of high added value from acid-washing stainless steel mud, thereby effectively realizes its economic worth; And the present invention is simple to operate and production cost is lower, obvious economic has reduced the pollution of environment when having saved cost.
embodiment:
Embodiment 1:
The method of Treatment and recovery utilization that acid-washing stainless steel mud is pollution-free, the method comprises the steps:
(1) water content that concentrates, is filtered to pickling mud is not more than 10%; Described concentrated be to adopt center driving high-efficiency concentrator, described filtration adopts plate type pressure filter.
(2) leach: be 98% the vitriol oil to adding mass percentage concentration in the mud after filtering, regulate the pH value of pickling mud 2, and be heated to 50 DEG C of stirrings 3 hours, then adopt Filter Press filtrate; Described heating is to adopt steam heating.
(3) reduction: add NaHS0 to filtrate
3, 1.05 times of the amount that the amount adding is Cr6+ mole, are reduced into Cr3+ by Cr6+;
(4) chromium nickel resources: in filtrate, add Na0H, the amount adding be Cr6+, Ni2+ ion amount of substance and 1.1 times, after filtration, the dry Cr (OH) that obtains
3and Ni (OH)
2metallurgical raw material;
(5) filter residue resource utilization: will remain after tailings and coke mixing, add in cupola furnace from furnace roof, in stove, pass to combustion air simultaneously, residue tailings is melt into rock wool melt by the high temperature being produced by coke burning, utilize the acceleration step by step of the Centrifugal rolling of roll-type fiberizer, by the rock wool melt flowing out from cupola furnace, in whizzer under the effect of centrifugal force, get rid of into rock wool fibers by stream thigh, then rock wool fibers is placed in the cotton collecting chamber of the cotton equipment of collection, there is movable conveying mesh bag in the bottom system of cotton collecting chamber, carry the below of mesh bag to be provided with wind chamber, in rock wool fibers, spray with vaporific vigorous knot agent, rock wool fibers is adsorbed on guipure surface by the negative pressure that relies on wind chamber to form, make rock wool raw material.
Embodiment 2:
The difference of the present embodiment and embodiment 1 is: step (2) leaches: be 98% the vitriol oil to adding mass percentage concentration in the mud after filtering, regulate the pH value of pickling mud 3, and be heated to 50 DEG C of stirrings 2 hours, then adopt Filter Press filtrate; Described heating is to adopt steam heating.
Embodiment 3:
The difference of the present embodiment and embodiment 1 is: step (2) leaches: be 98% the vitriol oil to adding mass percentage concentration in the mud after filtering, regulate the pH value of pickling mud 2.5, and be heated to 55 DEG C of stirrings 2.5 hours, then adopt Filter Press filtrate; Described heating is to adopt steam heating.
Embodiment 4:
The difference of the present embodiment and embodiment 1 is: step (2) leaches: be 98% the vitriol oil to adding mass percentage concentration in the mud after filtering, regulate the pH value of pickling mud 2.5, and be heated to 60 DEG C of stirrings 2.5 hours, then adopt Filter Press filtrate; Described heating is to adopt steam heating.
Embodiment 5:
The difference of the present embodiment and embodiment 1-4 is: step (3) reduction: add NaHS0 to filtrate
3, 1.05 times of the amount that the amount adding is Cr6+ mole, are reduced into Cr3+ by Cr6+.
Embodiment 6:
The difference of the present embodiment and embodiment 1-4 is: step (3) reduction: add NaHS0 to filtrate
3, 1.1 times of the amount that the amount adding is Cr6+ mole, are reduced into Cr3+ by Cr6+.
Below be only most preferred embodiment of the present invention, method of the present invention includes but not limited to above-described embodiment, and unaccomplished matter of the present invention belongs to those skilled in the art's common practise.
Claims (4)
1. the method that the pollution-free Treatment and recovery of acid-washing stainless steel mud utilizes, is characterized in that: the method comprises the steps:
(1) water content that concentrates, is filtered to pickling mud is not more than 10%;
(2) leach: be 98% the vitriol oil to adding mass percentage concentration in the mud after filtering, regulate the pH value of pickling mud at 2-3, and be heated to 50-60 DEG C of stirring 2-3 hour, then adopt Filter Press filtrate;
(3) reduction: add NaHS0 to filtrate
3, the 1.05-1.15 of the amount that the amount adding is Cr6+ mole doubly, is reduced into Cr3+ by Cr6+;
(4) chromium nickel resources: in filtrate, add Na0H, the amount adding be Cr6+, Ni2+ ion amount of substance and 1.1 times, after filtration, the dry Cr (OH) that obtains
3and Ni (OH)
2metallurgical raw material;
(5) filter residue resource utilization: will remain after tailings and coke mixing, and add in cupola furnace from furnace roof, and pass to combustion air in stove, residue tailings is melt into rock wool melt by the high temperature being produced by coke burning, makes rock wool raw material simultaneously.
2. the method that the pollution-free Treatment and recovery of acid-washing stainless steel mud according to claim 1 utilizes, is characterized in that: concentrated described in step (1) is to adopt center driving high-efficiency concentrator, and described filtration adopts plate type pressure filter.
3. the method that the pollution-free Treatment and recovery of acid-washing stainless steel mud according to claim 1 and 2 utilizes, is characterized in that: the heating described in step (2) is to adopt steam heating.
4. the method that the pollution-free Treatment and recovery of acid-washing stainless steel mud according to claim 1 and 2 utilizes, it is characterized in that: the acceleration step by step of making rock wool raw material and refer to the Centrifugal rolling that utilizes roll-type fiberizer described in step (5), by the rock wool melt flowing out from cupola furnace, in whizzer under the effect of centrifugal force, get rid of into rock wool fibers by stream thigh, then rock wool fibers is placed in the cotton collecting chamber of the cotton equipment of collection, there is movable conveying mesh bag in the bottom system of cotton collecting chamber, carry the below of mesh bag to be provided with wind chamber, in rock wool fibers, spray with vaporific vigorous knot agent, rock wool fibers is adsorbed on guipure surface by the negative pressure that relies on wind chamber to form, form rock wool raw material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410322187.7A CN104131166A (en) | 2014-07-08 | 2014-07-08 | Pollution-free treatment and recycling method of sludge generated during stainless steel acid washing process |
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|---|---|---|---|
| CN201410322187.7A CN104131166A (en) | 2014-07-08 | 2014-07-08 | Pollution-free treatment and recycling method of sludge generated during stainless steel acid washing process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104745821A (en) * | 2015-02-12 | 2015-07-01 | 江苏恒嘉再生资源有限公司 | Method for recovering nickel and copper metals in acid pickling sludge |
| CN105886779A (en) * | 2016-06-08 | 2016-08-24 | 浙江奇彩环境科技股份有限公司 | Resourceful treatment method of chromium-containing aluminum mud |
| GB2578645A (en) * | 2018-11-02 | 2020-05-20 | Darlow Lloyd & Sons Ltd | Method and apparatus for treating waste material |
| CN111662571A (en) * | 2017-12-12 | 2020-09-15 | 佛山市大千色釉料有限公司 | Preparation method of ceramic pigment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6136063A (en) * | 1998-03-03 | 2000-10-24 | Clemson University | Process for separating hazardous metals from waste materials during vitrification |
| CN102660687A (en) * | 2012-05-09 | 2012-09-12 | 南京大学 | Method for recycling heavy metal resources of stainless steel pickling waste water neutralization sludge |
| CN102690956A (en) * | 2012-06-18 | 2012-09-26 | 北京科技大学 | Method for green extraction of chromium and nickel from stainless steel pickled sludge |
| CN103725878A (en) * | 2014-01-10 | 2014-04-16 | 王洪 | Method for comprehensively utilizing residual tailings after extracting precious metals from acid pickling sludge |
| KR20140083085A (en) * | 2012-12-21 | 2014-07-04 | 주식회사 포스코 | Apparatus for recovering of precious metal and byproducts from ore |
-
2014
- 2014-07-08 CN CN201410322187.7A patent/CN104131166A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6136063A (en) * | 1998-03-03 | 2000-10-24 | Clemson University | Process for separating hazardous metals from waste materials during vitrification |
| CN102660687A (en) * | 2012-05-09 | 2012-09-12 | 南京大学 | Method for recycling heavy metal resources of stainless steel pickling waste water neutralization sludge |
| CN102690956A (en) * | 2012-06-18 | 2012-09-26 | 北京科技大学 | Method for green extraction of chromium and nickel from stainless steel pickled sludge |
| KR20140083085A (en) * | 2012-12-21 | 2014-07-04 | 주식회사 포스코 | Apparatus for recovering of precious metal and byproducts from ore |
| CN103725878A (en) * | 2014-01-10 | 2014-04-16 | 王洪 | Method for comprehensively utilizing residual tailings after extracting precious metals from acid pickling sludge |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104745821A (en) * | 2015-02-12 | 2015-07-01 | 江苏恒嘉再生资源有限公司 | Method for recovering nickel and copper metals in acid pickling sludge |
| CN104745821B (en) * | 2015-02-12 | 2017-01-25 | 江苏恒嘉再生资源有限公司 | Method for recovering nickel and copper metals in acid pickling sludge |
| CN105886779A (en) * | 2016-06-08 | 2016-08-24 | 浙江奇彩环境科技股份有限公司 | Resourceful treatment method of chromium-containing aluminum mud |
| CN111662571A (en) * | 2017-12-12 | 2020-09-15 | 佛山市大千色釉料有限公司 | Preparation method of ceramic pigment |
| CN111662571B (en) * | 2017-12-12 | 2021-09-03 | 佛山市大千色釉料有限公司 | Preparation method of ceramic pigment |
| GB2578645A (en) * | 2018-11-02 | 2020-05-20 | Darlow Lloyd & Sons Ltd | Method and apparatus for treating waste material |
| GB2578645B (en) * | 2018-11-02 | 2021-11-24 | Darlow Lloyd & Sons Ltd | Method and apparatus for treating waste material |
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Application publication date: 20141105 |