CN103011638A - Method for producing cement by use of lead and zinc tailings - Google Patents
Method for producing cement by use of lead and zinc tailings Download PDFInfo
- Publication number
- CN103011638A CN103011638A CN2012104090281A CN201210409028A CN103011638A CN 103011638 A CN103011638 A CN 103011638A CN 2012104090281 A CN2012104090281 A CN 2012104090281A CN 201210409028 A CN201210409028 A CN 201210409028A CN 103011638 A CN103011638 A CN 103011638A
- Authority
- CN
- China
- Prior art keywords
- kiln
- lime
- tailings
- cement
- gas
- 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
-
- 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
-
- 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
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for producing cement by use of lead and zinc tailings. The method comprises the following steps of: calcining limestone and lead and zinc tailings serving as raw materials in a rotary kiln to obtain cement clinker; leading kiln gas generated in the rotary kiln into a lime kiln; preparing lime by use of the waste heat of the kiln gas; leading the kiln gas generated in the lime kiln into a carbonization tunnel kiln to carbonize the mixture of the lime and the lead and zinc tailings to obtain cement admixture; and proportionally mixing the cement admixture with the cement clinker to obtain the cement. According to the invention, river sand is replaced by the lead and zinc tailings, thus a great quantity of lead and zinc tailings are consumed to turn waste into wealth, and the environment of a mining area is improved; and moreover, the waste heat of the flue gas in the rotary kiln is led into the lime kiln to prepare lime, thus the waste of the waste heat is avoided, and the energy is saved. Meanwhile, the kiln gas (CO2 and CO) generated in the lime kiln is delivered into the carbonization tunnel kiln to carbonize the lime and the lead and zinc tailings, thus the emission of kiln gas is reduced, and the aim of environmental protection is achieved.
Description
Technical field
The present invention relates to a kind of method of producing cement with Pb-Zn tailings.
Background technology
Enter 21 century, green, environmental protection becomes the theme in the world, and along with the high speed development that Chinese national economy is built, energy-conservation, reduction of discharging, low-carbon (LC) and recycling economy become the fundamental policy of China.Building material industry is the industry of eating quantity of slag maximum, is bearing the heavy burden of recycling economy.
Dragon's pool township, strata in Shizhu, Chongqing county is one of important producing region of plumbous zinc ore, the plumbous zinc ore of a large amount of high-quality that distributing, for a long time owing to reasons such as fund and mismanagements, only live again to produce and ignore a large amount of Pb-Zn tailings of Pollution abatement generation in a lot of mining areas in the process of the plumbous zinc ore of exploitation, and the main component of Pb-Zn tailings sees the following form: close with the composition of river sand.Pb-Zn tailings has caused the soil and environment around the mining area and has seriously influenced.Heavy metals mining area has caused the serious heavy metal contamination of soil and river by release and migration under the earth's surface biological geochemistry process, and these contaminated water enter farm crop by irrigation method, and enter human body by food chain, people and animals' existence, health and living environment near the mining area are constituted a serious threat.
The method of traditional mode of production cement clinker is that river sand and Wingdale are sent in the rotary kiln, at high temperature calcining,
Quenching obtains cement clinker, is utilizing rotary kiln to prepare in the process of cement clinker, and (main component is CO to the stack gas of generation
2) temperature have about 600 ℃, at present in process of production people directly with this gaseous emission to air, cause the waste of environmental pollution and the energy, do not meet the theory of environmental protection.
Summary of the invention
In order to solve the problems of the technologies described above, the object of the present invention is to provide the Pb-Zn tailings that utilizes of a kind of environmental protection, less energy-consumption to produce the method for cement.
The present invention is achieved in that a kind of method of utilizing Pb-Zn tailings to produce cement, finishes in accordance with the following steps:
(1), with weight percent be the coal pulverizer of the Pb-Zn tailings of Wingdale, 35%-38% of 60%-64% and 1%-3% to the 150-200 order, then they are sent in the rotary kiln, 1350-1450 ℃ of lower calcining, quenching obtains cement clinker;
(2) be that the Wingdale of 70%-75% and the coal of 25-30% are sent in the limestone kiln with weight percent, the stack gas that rotary kiln in the step (1) produces is introduced in the limestone kiln by induced draft fan, obtain lime 900～1100 ℃ of lower calcinings;
(3) after being mixed, the lime that obtains in the step (2) and Pb-Zn tailings send in the carbonization tunnel furnace, with induced draft fan the kiln gas that produces in the limestone kiln is introduced in the carbonization tunnel furnace simultaneously, the carbonization that lime and Pb-Zn tailings were carried out 6-7 hour generates cement admixture, the weight percent of described lime and Pb-Zn tailings is 15%:85%, and the main component of described kiln gas is CO
2And CO;
(4) with the cement admixture that obtains in the cement clinker that obtains in the step (1) and the step (3) by weight percentage for the ratio of 25%-35%:65%-75% mix after ball milling obtain cement.
Adopt technique scheme, replace river sand with Pb-Zn tailings, consume in a large number Pb-Zn tailings, turn waste into wealth, so that environment of mining area improves, secondly, the waste heat of the stack gas in the rotary kiln is introduced in the limestone kiln for the preparation of lime, avoided the waste of waste heat, save the energy.Simultaneously, again with the kiln gas (CO that produces in the limestone kiln
2And CO) delivers to and lime and Pb-Zn tailings are carried out carbonization in the carbonization tunnel furnace, reduce the discharging of kiln gas, reach the purpose of environmental protection.
In technique scheme: the main component of described rotary kiln stack gas is CO
2, its temperature is 550-650 ℃.
Beneficial effect: the present invention consumes lead-zinc ore tailings in a large number, when solving problem of environmental pollution and potential safety hazard, takes full advantage of waste heat, reduces energy consumption, meets environmental protection concept.
Embodiment
The present invention is described further below in conjunction with specific embodiment
Embodiment 1
(1), be that the coal pulverizer of 60% Wingdale, 38% Pb-Zn tailings and 2% is to the 150-200 order with weight percent, then they are sent in the rotary kiln, 1350-1450 ℃ of lower calcining, quenching obtains cement clinker, and (main component is CO to produce stack gas simultaneously in rotary kiln
2, the temperature of stack gas is 550-650 ℃);
(2) be that 70% Wingdale and 30% coal are sent in the limestone kiln with weight percent, (main component is CO to the stack gas that rotary kiln in the step (1) is produced
2, the temperature of stack gas is 550-650 ℃) introduce in the limestone kiln by induced draft fan, obtain lime 900～1100 ℃ of lower calcinings, in the limestone kiln, produce kiln gas simultaneously, the main component of described kiln gas is CO
2And CO, this moment, the temperature of kiln gas only had tens degree;
(3) after being mixed, the lime that obtains in the step (2) and Pb-Zn tailings send in the carbonization tunnel furnace, with induced draft fan the kiln gas that produces in the limestone kiln is introduced in the carbonization tunnel furnace simultaneously, the carbonization that lime and Pb-Zn tailings were carried out 6 hours generates cement admixture, and the weight percent of described lime and Pb-Zn tailings is 15%:85%.
(4) with the cement admixture that obtains in the cement clinker that obtains in the step (1) and the step (3) by weight percentage for the ratio of 25%:75% mix after ball milling obtain cement.
Embodiment 2
(1), be that the coal pulverizer of 64% Wingdale, 35% Pb-Zn tailings and 1% is to the 150-200 order with weight percent, then they are sent in the rotary kiln, 1350-1450 ℃ of lower calcining, quenching obtains cement clinker, and (main component is CO to produce stack gas simultaneously in rotary kiln
2, the temperature of stack gas is 550-650 ℃);
(2) be that 75% Wingdale and 25% coal are sent in the limestone kiln with weight percent, (main component is CO to the stack gas that rotary kiln in the step (1) is produced
2, the temperature of stack gas is 550-650 ℃) introduce in the limestone kiln by induced draft fan, obtain lime 900～1100 ℃ of lower calcinings, in the limestone kiln, produce kiln gas simultaneously, the main component of described kiln gas is CO
2And CO, this moment, the temperature of kiln gas only had tens degree;
(3) after being mixed, the lime that obtains in the step (2) and Pb-Zn tailings send in the carbonization tunnel furnace, with induced draft fan the kiln gas that produces in the limestone kiln is introduced in the carbonization tunnel furnace simultaneously, the carbonization that lime and Pb-Zn tailings were carried out 7 hours generates cement admixture, and the weight percent of described lime and Pb-Zn tailings is 15%:85%.
(4) with the cement admixture that obtains in the cement clinker that obtains in the step (1) and the step (3) by weight percentage for the ratio of 35%:65% mix after ball milling obtain cement.
Embodiment 3
(1), be that the coal pulverizer of 62% Wingdale, 36% Pb-Zn tailings and 2% is to the 150-200 order with weight percent, then they are sent in the rotary kiln, 1350-1450 ℃ of lower calcining, quenching obtains cement clinker, and (main component is CO to produce stack gas simultaneously in rotary kiln
2, the temperature of stack gas is 550-650 ℃);
(2) be that 70% Wingdale and 30% coal are sent in the limestone kiln with weight percent, (main component is CO to the stack gas that rotary kiln in the step (1) is produced
2, the temperature of stack gas is 550-650 ℃) introduce in the limestone kiln by induced draft fan, obtain lime 900～1100 ℃ of lower calcinings, in the limestone kiln, produce kiln gas simultaneously, the main component of described kiln gas is CO
2And CO, this moment, the temperature of kiln gas only had tens degree;
(3) after being mixed, the lime that obtains in the step (2) and Pb-Zn tailings send in the carbonization tunnel furnace, with induced draft fan the kiln gas that produces in the limestone kiln is introduced in the carbonization tunnel furnace simultaneously, the carbonization that lime and Pb-Zn tailings were carried out 6-7 hour generates cement admixture, and the weight percent of described lime and Pb-Zn tailings is 15%:85%.
(4) with the cement admixture that obtains in the cement clinker that obtains in the step (1) and the step (3) by weight percentage for the ratio of 30%:70% mix after ball milling obtain cement.
The prepared cement of the present invention is done quantitative measurement, obtains following table:
Cement " the radioactive material nucleic is limited the quantity of " detection case table
We can find out from table, and the cement physical properties of the present invention's preparation is good, meets the requirement of " the radioactive material nucleic is limited the quantity of ".
Claims (2)
1. method of utilizing Pb-Zn tailings to produce cement is characterized in that: finish in accordance with the following steps:
(1) with weight percent be the coal pulverizer of the Pb-Zn tailings of Wingdale, 35%-38% of 60%-64% and 1%-3% to the 150-200 order, then they are sent in the rotary kiln, 1350-1450 ℃ of lower calcining, quenching obtains cement clinker;
(2) be that the Wingdale of 70%-75% and the coal of 25-30% are sent in the limestone kiln with weight percent, the stack gas that rotary kiln in the step (1) produces is introduced in the limestone kiln by induced draft fan, obtain lime 900～1100 ℃ of lower calcinings;
(3) after being mixed, the lime that obtains in the step (2) and Pb-Zn tailings send in the carbonization tunnel furnace, with induced draft fan the kiln gas that produces in the limestone kiln is introduced in the carbonization tunnel furnace simultaneously, the carbonization that lime and Pb-Zn tailings were carried out 6-7 hour generates cement admixture, the weight percent of described lime and Pb-Zn tailings is 15%:85%, and the main component of described kiln gas is CO
2And CO;
(4) with the cement admixture that obtains in the cement clinker that obtains in the step (1) and the step (3) by weight percentage for the ratio of 25%-35%:65%-75% mix after ball milling obtain cement.
2. the described method of utilizing Pb-Zn tailings to produce cement according to claim 1, it is characterized in that: the main component of described rotary kiln stack gas is CO
2, its temperature is 550-650 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104090281A CN103011638A (en) | 2012-10-24 | 2012-10-24 | Method for producing cement by use of lead and zinc tailings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104090281A CN103011638A (en) | 2012-10-24 | 2012-10-24 | Method for producing cement by use of lead and zinc tailings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103011638A true CN103011638A (en) | 2013-04-03 |
Family
ID=47960807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104090281A Pending CN103011638A (en) | 2012-10-24 | 2012-10-24 | Method for producing cement by use of lead and zinc tailings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103011638A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105236784A (en) * | 2015-09-18 | 2016-01-13 | 花垣县强桦矿业有限责任公司 | Preparation method of composite tailing slag active micro-powder for concrete admixture |
| CN108892400A (en) * | 2018-07-23 | 2018-11-27 | 中煤地质工程有限公司北京水工环地质勘查院 | A kind of vanadium tailing cement admixture and the preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1657469A (en) * | 2005-01-24 | 2005-08-24 | 浙江大学 | Process for calcining cement clinker of matching decomposing point lime stone with stripping point of siO2 |
| CN101121579A (en) * | 2007-07-12 | 2008-02-13 | 北京科技大学 | Method for producing concrete active admixture by iron tailings |
-
2012
- 2012-10-24 CN CN2012104090281A patent/CN103011638A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1657469A (en) * | 2005-01-24 | 2005-08-24 | 浙江大学 | Process for calcining cement clinker of matching decomposing point lime stone with stripping point of siO2 |
| CN101121579A (en) * | 2007-07-12 | 2008-02-13 | 北京科技大学 | Method for producing concrete active admixture by iron tailings |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105236784A (en) * | 2015-09-18 | 2016-01-13 | 花垣县强桦矿业有限责任公司 | Preparation method of composite tailing slag active micro-powder for concrete admixture |
| CN108892400A (en) * | 2018-07-23 | 2018-11-27 | 中煤地质工程有限公司北京水工环地质勘查院 | A kind of vanadium tailing cement admixture and the preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106242328B (en) | A kind of Portland clinker | |
| CN101786811B (en) | Method for preparing multicomponent powder binding material | |
| CN101386494A (en) | Composite gelate material and preparation method thereof | |
| CN101050140A (en) | Method for producing multiplex siliceous fertilizer from molybdenum mine tailings | |
| CN105016643B (en) | A kind of new miberal powder of utilization sludge production and preparation method thereof | |
| CN107098735A (en) | A kind of high-temperature activation potassium feldspar and preparation 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 | |
| CN110845159A (en) | Preparation method for producing portland cement clinker by coal gangue | |
| CN104845627A (en) | Soil conditioner made by using municipal domestic waste | |
| CN102659337A (en) | Composite Portland cement using green mud and basalt as mixed materials | |
| CN108611098A (en) | Handle the heavy metal deactivator and preparation method thereof of heavy-metal contaminated soil | |
| CN101935178A (en) | Accelerating agent | |
| CN105481271A (en) | Low-alkali cement prepared from copper mine tailing and preparation method thereof | |
| CN104628412B (en) | Utilize the method that hot vexed slag produces insulation blocks haydite | |
| CN103936504B (en) | A kind of preparation method of micro-nano mineral selenium fertilizer | |
| CN107746193A (en) | A kind of industrial residue oil-well cement and preparation method thereof | |
| CN103232181B (en) | Preparation method of titanium dioxide slag concrete additive | |
| CN107473613A (en) | It is a kind of to utilize cement of industrial solid-state castoff production and preparation method thereof | |
| CN110372457A (en) | A kind of production method of gangue microorganism mineral fertilizer | |
| CN1803688A (en) | Composite portland cement produced by full utilization of industrial waste slag | |
| CN103011740A (en) | Steam-curing-free light-weight wall body carbonized brick and preparation method thereof | |
| CN103011638A (en) | Method for producing cement by use of lead and zinc tailings | |
| CN117362124A (en) | Method for preparing artificial black soil by decarbonizing and impurity removing coal gangue | |
| CN103755182A (en) | Ardealite cementing material and preparation method thereof | |
| CN104129935A (en) | Modified glass tailing cement-based auxiliary cementing material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130403 |