CN101607794B - Method for preparing cement with tannery sludge - Google Patents
Method for preparing cement with tannery sludge Download PDFInfo
- Publication number
- CN101607794B CN101607794B CN2009100882434A CN200910088243A CN101607794B CN 101607794 B CN101607794 B CN 101607794B CN 2009100882434 A CN2009100882434 A CN 2009100882434A CN 200910088243 A CN200910088243 A CN 200910088243A CN 101607794 B CN101607794 B CN 101607794B
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- Prior art keywords
- leather
- mud
- cement
- exsiccant
- alumina
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
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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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a method for preparing cement with tannery sludge, comprising the following steps: (a) mixing potassium persulfate and tannery sludge with a solid material content of 15-20%; (b) performing mechanical dehydration on the tannery sludge which is mixed with potassium persulfate to obtain the dry tannery sludge; (c) heating the dry tannery sludge to 1600-1650 DEG C and keeping temperature for 2-3h; (d) adding limestone and alumina in the heated dry tannery sludge; (e) calcining the mixture of dry tannery sludge, limestone and alumina at 1300-1400 DEG C to produce cement clinker; (f) adding gypsum in the cement clinker and grinding the mixture to prepare cement; wherein, the weight ratio of potassium persulfate to the solid materials of the tannery sludge is 60-80:1. By adopting the method of the invention to treat tannery sludge, cement can be prepared, thus reaching the aim of the reuse of resources.
Description
Technical field
The present invention relates to a kind of method of utilizing leather-making mud, relate in particular to and a kind ofly can leather-making mud be produced cement to realize the recovery of resources method.
Background technology
Leather-making mud is the mud of discharging in the leather production.Usually animal skin makes its swelling with salted or be soaked in water, and adds lime, fleshing, dealkalize, and then with tannin or chromium, the tanning stuffing is softening, dyes at last and is processed into leather.Whole process hides process medium salting skin produces waste water 600-700L for every kilogram, and water quality is different with plant size, raw hide kind and process for tanning.And a large amount of mud is contained in these water the insides.Particularly leather-making waste water need pass through biological treatment, and can remaining a large amount of active sludge after the biological treatment.
Owing to contain some heavy metal elements, particularly chromium, therefore pollute very big in the leather-making mud.And because animal skin is with salted usually, and therefore the saltiness in the water is very high in the soaking and washing process, these have all hindered the recycling of leather-making mud.Therefore, how to solve the environmental issue that leather-making mud brings, become the technical problem that needs to be resolved hurrily.
Comprising materials such as hairiness, onal, grain, sliced meat in the leather-making mud, is the waste with peculiar smell, therefore in storing process, is easy to generate the putridness stink.With regard to incinerate leather-making mud through incinerator with regard to, do not incinerate organism completely owing to wherein still contain, be difficult to effective recycling, can only how to handle the back and use as the backfilling of pipe canal material with sanitary landfill or washing.But, be subject to problems such as the expensive and stink loss of burying place and water washing process and wastewater treatment is serious, the regenerative process of incinerator waste still must be dependent on government subsidy can continue running.
Comprehensively aforementioned; The leather-making mud that grows with each passing day has become the big secret worry of one in the environmental protection, in response to burying the saturated predicament in place, and reduces the secondary public hazards that produced in the treating processes; Develop a kind of leather-making mud and handle and regeneration techniques, not less than being a kind of solution actively and positively.
Summary of the invention
To this lime-ash waste that contains organic putridness stink of leather-making mud; Because its stink mainly comes from putrid organism; Belong to unmanageable waste, therefore, the object of the present invention is to provide a kind of renovation process of leather mud; Through leather mud is processed cement, make it become the raw material that can utilize again.
For reaching above-mentioned purpose, the present invention provides a kind of method of utilizing leather-making mud to produce cement, wherein, comprises following steps:
(a) Potassium Persulphate is mixed with the leather mud of solid matter content between 15～20%, the weight ratio of wherein said Potassium Persulphate and said solid matter is 60～80: 1;
(b) will carry out mechanical dehydration with Potassium Persulphate blended leather mud, to obtain exsiccant leather mud;
(c) exsiccant leather mud is heated to 1600～1650 degrees centigrade, and kept 2～3 hours;
(d) in heated exsiccant leather mud, add Wingdale and alumina, the weight percent that its component is mixed is:
Exsiccant leather mud: 30～35%
Wingdale: 40～45%
All the other are alumina;
(e) mixture of exsiccant leather mud, Wingdale and alumina is calcined, calcining temperature is processed cement clinker thus between 1300～1400 degrees centigrade;
(f) in said cement clinker, add gypsum, grind and process cement.
The method of utilizing leather-making mud to produce cement of the present invention, wherein, the weight ratio of said Potassium Persulphate and said solid matter is 75: 1.
The method of utilizing leather-making mud to produce cement of the present invention, wherein, the pH value of the mixture of said Potassium Persulphate and said leather mud is between 3～4.
The method of utilizing leather-making mud to produce cement of the present invention wherein, is added Wingdale and alumina in heated exsiccant leather mud, the weight percent that its component is mixed is:
Exsiccant leather mud: 32%
Wingdale: 43%
All the other are alumina.
The method of utilizing leather-making mud to produce cement of the present invention wherein, in said (e) step, after said mixture is calcined, when treating that temperature is reduced to 300～350 degrees centigrade, kept under this temperature 5～6 hours, so that cement clinker is carried out maintenance.
The method of utilizing leather-making mud to produce cement provided by the present invention can effectively solve the peculiar smell of waste and be difficult for the difficult problem of stabilization; And the raw product again of the cement with economic benefit is provided; Decapacitation reduces the heavy burden in the environmental protection, also can develop the produce market of renewable resources.
Description of drawings
Fig. 1 is the schema that utilizes leather-making mud to produce the method for cement of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is further specified, so that those of ordinary skills are with reference to implementing according to this behind this specification sheets.
A kind of method of utilizing leather-making mud to produce cement of the present invention wherein, comprises following steps:
(a) Potassium Persulphate is mixed with the leather mud of solid matter content between 15～20%, the weight ratio of wherein said Potassium Persulphate and said solid matter is 60～80: 1.Through in leather mud, adding Potassium Persulphate, Potassium Persulphate can react with mud, helps mechanical sludge dewatering subsequently.
(b) will carry out mechanical dehydration with Potassium Persulphate blended leather mud, to obtain exsiccant leather mud; This moment, the water ratio of mud was lower than 20%.
(c) exsiccant leather mud is heated to 1600～1650 degrees centigrade, and kept 2～3 hours; Can further reduce the water ratio of mud through heating leather mud, and under 1600～1650 degrees centigrade high temperature, can incinerate objectionable impurities wherein.
(d) in heated exsiccant leather mud, add Wingdale and alumina, the weight percent that its component is mixed is:
Exsiccant leather mud: 30～35%
Wingdale: 40～45%
All the other are alumina;
(e) mixture of exsiccant leather mud, Wingdale and alumina is calcined, calcining temperature is processed cement clinker thus between 1300～1400 degrees centigrade;
(f) in said cement clinker, add gypsum, grind and process cement.
The contriver finds through test, produces in the method for cement at leather-making mud, and the weight ratio of said Potassium Persulphate and said solid matter is 75: 1 o'clock, can obtain reasonable effect.
In order to impel Potassium Persulphate and leather sludge reaction, can be through adding the method for pH value unit, the pH value of the mixture of said Potassium Persulphate and said leather mud is adjusted between 3～4.
Utilize in the method that leather-making mud produces cement described, in heated exsiccant leather mud, add Wingdale and alumina, the weight percent that its component is mixed is:
Exsiccant leather mud: 32%
Wingdale: 43%
All the other are alumina.Can obtain reasonable effect like this.
Utilize in the method that leather-making mud produces cement described, in said (e) step, after said mixture is calcined, when treating that temperature is reduced to 300～350 degrees centigrade, under this temperature, kept 5～6 hours, so that cement clinker is carried out maintenance.Through maintenance, can promote each item performance index of cement to obtain to optimize.
Although embodiment of the present invention are open as above; But it is not restricted to listed utilization in specification sheets and the embodiment; It can be applied to various suitable the field of the invention fully, for being familiar with those skilled in the art, can easily realize other modification; Therefore under the universal that does not deviate from claim and equivalency range and limited, the legend that the present invention is not limited to specific details and illustrates here and describe.
Claims (5)
1. method of utilizing leather-making mud to produce cement wherein, comprises following steps:
(a) Potassium Persulphate is mixed with the leather mud of solid matter content between 15～20%, the weight ratio of wherein said Potassium Persulphate and said solid matter is 60～80: 1;
(b) will carry out mechanical dehydration with Potassium Persulphate blended leather mud, to obtain exsiccant leather mud;
(c) exsiccant leather mud is heated to 1600～1650 degrees centigrade, and kept 2～3 hours;
(d) in heated exsiccant leather mud, add Wingdale and alumina, the weight percent that its component is mixed is:
Exsiccant leather mud: 30～35%
Wingdale: 40～45%
All the other are alumina;
(e) mixture of exsiccant leather mud, Wingdale and alumina is calcined, calcining temperature is processed cement clinker thus between 1300～1400 degrees centigrade;
(f) in said cement clinker, add gypsum, grind and process cement.
2. the method for utilizing leather-making mud to produce cement as claimed in claim 1, wherein, the weight ratio of said Potassium Persulphate and said solid matter is 75: 1.
3. the method for utilizing leather-making mud to produce cement as claimed in claim 1, wherein, the pH value of the mixture of said Potassium Persulphate and said leather mud is between 3～4.
4. the method for utilizing leather-making mud to produce cement as claimed in claim 1 wherein, is added Wingdale and alumina in heated exsiccant leather mud, the weight percent that its component is mixed is:
Exsiccant leather mud: 32%
Wingdale: 43%
All the other are alumina.
5. the method for utilizing leather-making mud to produce cement as claimed in claim 1, wherein, in said (e) step; After said mixture is calcined; When treating that temperature is reduced to 300～350 degrees centigrade, under this temperature, kept 5～6 hours, so that cement clinker is carried out maintenance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100882434A CN101607794B (en) | 2009-07-14 | 2009-07-14 | Method for preparing cement with tannery sludge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100882434A CN101607794B (en) | 2009-07-14 | 2009-07-14 | Method for preparing cement with tannery sludge |
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| CN101607794A CN101607794A (en) | 2009-12-23 |
| CN101607794B true CN101607794B (en) | 2012-05-23 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102775083B (en) * | 2012-08-08 | 2014-06-18 | 苏州伟宇天诚环保科技有限公司 | Technique for preparing cement from sewage plant calcium phosphate sludge |
| CN105000815A (en) * | 2014-04-17 | 2015-10-28 | 宝山钢铁股份有限公司 | Method for synergistically treating heavy metal sludge in cement production |
| CN106186746A (en) * | 2016-06-30 | 2016-12-07 | 浙江新业管桩有限公司 | A kind of method utilizing printing and dyeing sludge to prepare clinker |
| CN106186747A (en) * | 2016-06-30 | 2016-12-07 | 浙江新业管桩有限公司 | A kind of method utilizing printing and dyeing sludge to prepare high strength clinker |
| CN105967493A (en) * | 2016-07-11 | 2016-09-28 | 安徽锋亚环境技术有限公司 | 'One-stop' solution system and 'one-stop' solution method for tap water plant sludge treatment |
| CN109231959A (en) * | 2018-08-15 | 2019-01-18 | 陕西科技大学 | A kind of preparation method using leather sludge production exterior wall tile |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1609031A (en) * | 2004-11-09 | 2005-04-27 | 张立省 | New type of ecological cement and its prepn and application |
| CN1746125A (en) * | 2004-09-07 | 2006-03-15 | 王权平 | Water-proof nanometer cement and production thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1746125A (en) * | 2004-09-07 | 2006-03-15 | 王权平 | Water-proof nanometer cement and production thereof |
| CN1609031A (en) * | 2004-11-09 | 2005-04-27 | 张立省 | New type of ecological cement and its prepn and application |
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| CN101607794A (en) | 2009-12-23 |
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