CN105314903A - Method for producing cement and cement kiln dust simultaneously through potassium feldspar - Google Patents

Method for producing cement and cement kiln dust simultaneously through potassium feldspar Download PDF

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Publication number
CN105314903A
CN105314903A CN201510336383.4A CN201510336383A CN105314903A CN 105314903 A CN105314903 A CN 105314903A CN 201510336383 A CN201510336383 A CN 201510336383A CN 105314903 A CN105314903 A CN 105314903A
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CN
China
Prior art keywords
potassium
raw material
felspar sand
cement
kiln
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Pending
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CN201510336383.4A
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Chinese (zh)
Inventor
孙琼珂
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Luoyang Mingli Science and Technology Development Co Ltd
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Luoyang Mingli Science and Technology Development Co Ltd
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Priority to CN201510336383.4A priority Critical patent/CN105314903A/en
Publication of CN105314903A publication Critical patent/CN105314903A/en
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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
    • Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods

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  • Fertilizers (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention discloses a method for producing cement and cement kiln dust simultaneously through potassium feldspar. The method comprises the following steps that limestone, sandstone, potassium feldspar, iron powder and a fluorite additive are crushed and then mixed, wherein the mixture comprises, by weight, 72-77% of limestone, 17-20% of potassium feldspar, 2-6% of sandstone, 2-4% of iron ore and 1-2% of fluorite additive, and the sum of the percentages of all the components is 100%; the mixed raw materials are ground into raw materials with the granularity of 0.08-0.10 mm; the raw materials are evenly mixed and then fed into a kiln system, high-sulphur coal is adopted as fuel, and preheating, decomposition, calcination and cooling are carried out to obtain cement clinker; in the calcination process, K2O in the potassium feldspar is volatilized and compounded with SO2 and CO2 in high-sulfur coal soot to form K2SO4 and K2CO3 at first and then form potassium metasilicate and potassium aluminate to be concentrated in a kiln along with soot; kiln dust containing potassium is recycled through an efficient recycling device and processed into potassic fertilizer.

Description

A kind of method utilizing potassium felspar sand simultaneously to produce cement and kiln ash potash fertilizer
Technical field
The present invention relates to a kind of method that potassium felspar sand develops, particularly relate to a kind of this method utilizing potassium felspar sand simultaneously to produce cement and kiln ash potash fertilizer.
Background technology
China is a large agricultural country, and because soluble potassium ore resources reserves are few, potash fertilizer is in the state that supply falls short of demand always, relies on import over the years.On the contrary, China's insoluble potassic mineral aboundresources, especially constitutionally stable potassium felspar sand, potassium content is high and standing stock are large.Therefore, utilizing potassium felspar sand to produce potash fertilizer is solve China to the fundamental solution of potash fertilizer demand.
China just starts the research utilizing producing potassium fertilizer from potash feldspar from the end of the fifties, the method that current China is commonly used to process potassium felspar sand mainly contains sintering process, high-temperature melting method, hydrothermal method, blast-furnace smelting method and low-temperature decomposition method etc.But up to the present, potassium felspar sand is produced potash fertilizer and is obtained large-scale commercial production not yet, is still only limitted to the experimental phase, and research work is also carried out less, tracing it to its cause, is because potassium felspar sand is difficult to process on the one hand, complex manufacturing, yield is low, tailings is many, and energy consumption is high, and product specification is low, comprehensive benefit is poor, and each quality product of its technology all lacks the market competitiveness; That important position is not yet put to the utilization of potassium felspar sand on the other hand.
Therefore, to develop the route of an economic processing potassium felspar sand, the above-mentioned defect existed in technique in the past must be overcome, potassium, aluminium, element silicon in comprehensive utilization potassium felspar sand, while producing potash fertilizer, the silicate series product that by-product added value is higher also reduces energy consumption, and this is also the domestic development trend utilizing Potassic Fertilizer Production from Potash Feldspar at present.
Because above-mentioned existing potassium felspar sand develops the defect existed, the present inventor is based on being engaged in the practical experience and expertise that this type of product design manufacture enriches for many years, and coordinate the utilization of scientific principle, actively in addition research and innovation, to founding a kind of method that new potassium felspar sand develops, the exploitation of general existing potassium felspar sand can be improved, make it have better economic benefit.Through constantly research, design, and through repeatedly studying sample and after improving, finally creating the present invention had practical value.
Summary of the invention
Utilize potassium felspar sand to replace clay preparation cement slurry during object of the present invention, produce cement clinker and kiln ash potash fertilizer simultaneously, realize the scale production of kiln ash potash fertilizer, alleviate China's potash fertilizer supply, reduce import.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of method using potassium felspar sand to produce cement and kiln ash potash fertilizer that the present invention proposes simultaneously, it comprises following steps:
1) by after Wingdale, sandstone, potassium felspar sand, iron powder and these raw material crushings of fluorite additive, prepare burden, in batching, the weight percent of each component is: Wingdale 72-77%, potassium felspar sand 17-20%, sandstone 2-6%, iron ore 2-4%, and fluorite additive 1-2%, the summation of each component percentages is 100%;
2) raw material powder after above-mentioned batching is worn into raw material, the granularity of raw material is 0.08-0.10mm;
3) above-mentioned raw material are mixed rear feeding kiln system, employing high sulphur coal is fuel, becomes cement clinker through preheating, decomposition, calcining, cooling;
4) K in calcination process in potassium felspar sand 2o evaporates, with the SO in high sulphur coal flue gas 2, CO 2chemical combination, first forms K 2sO 4, K 2cO 3, form potassium silicate and potassium aluminate after a while, concentrate in kiln ash with flue gas;
5) collected by high efficiente callback device above-mentioned containing potassium kiln ash, be processed into potash fertilizer.
The present invention compared with prior art has obvious advantage and beneficial effect.By technique scheme, a kind of method using potassium felspar sand simultaneously to produce cement and kiln ash potash fertilizer of the present invention can reach suitable technical progress and practicality, and the extensive utility value had in industry, it at least has following advantages: the potassium felspar sand resource utilizing China's abundant, realize the scale production of kiln ash potash fertilizer, alleviate China's potash fertilizer supply, reduce import.
Embodiment
For further setting forth the present invention for preferred embodiment below the technique means reaching predetermined goal of the invention and take, a kind of its embodiment of method using potassium felspar sand simultaneously to produce cement and kiln ash potash fertilizer proposed according to the present invention is described in detail as follows.
Embodiment 1
Use potassium felspar sand to produce a method for cement and kiln ash potash fertilizer, it comprises following steps simultaneously;
1) by after Wingdale, sandstone, potassium felspar sand, iron powder and these raw material crushings of fluorite additive, prepare burden, in batching, the weight percent of each component is: Wingdale 72%, potassium felspar sand 20%, sandstone 2%, iron ore 4%, and fluorite additive 2%, the summation of each component percentages is 100%;
2) raw material powder after above-mentioned batching is worn into raw material, the granularity of raw material is 0.08mm;
3) above-mentioned raw material are mixed rear feeding kiln system, employing high sulphur coal is fuel, becomes cement clinker through preheating, decomposition, calcining, cooling;
4) K in calcination process in potassium felspar sand 2o evaporates, with the SO in high sulphur coal flue gas 2, CO 2chemical combination, first forms K 2sO 4, K 2cO 3, form potassium silicate and potassium aluminate after a while, concentrate in kiln ash with flue gas;
5) collected by high efficiente callback device above-mentioned containing potassium kiln ash, be processed into potash fertilizer.
Embodiment 2
Use potassium felspar sand to produce a method for cement and kiln ash potash fertilizer, it comprises following steps simultaneously;
1) by after Wingdale, sandstone, potassium felspar sand, iron powder and these raw material crushings of fluorite additive, prepare burden, in batching, the weight percent of each component is: Wingdale 75%, potassium felspar sand 17%, sandstone 4%, iron ore 2%, and fluorite additive 2%, the summation of each component percentages is 100%;
2) raw material powder after above-mentioned batching is worn into raw material, the granularity of raw material is 0.09mm;
3) above-mentioned raw material are mixed rear feeding kiln system, employing high sulphur coal is fuel, becomes cement clinker through preheating, decomposition, calcining, cooling;
4) K in calcination process in potassium felspar sand 2o evaporates, with the SO in high sulphur coal flue gas 2, CO 2chemical combination, first forms K 2sO 4, K 2cO 3, form potassium silicate and potassium aluminate after a while, concentrate in kiln ash with flue gas;
5) collected by high efficiente callback device above-mentioned containing potassium kiln ash, be processed into potash fertilizer.
Embodiment 3
Use potassium felspar sand to produce a method for cement and kiln ash potash fertilizer, it comprises following steps simultaneously;
1) by after Wingdale, sandstone, potassium felspar sand, iron powder and these raw material crushings of fluorite additive, prepare burden, in batching, the weight percent of each component is: Wingdale 77%, potassium felspar sand 17%, sandstone 2%, iron ore 3%, and fluorite additive 1%, the summation of each component percentages is 100%;
2) raw material powder after above-mentioned batching is worn into raw material, the granularity of raw material is 0.1mm;
3) above-mentioned raw material are mixed rear feeding kiln system, employing high sulphur coal is fuel, becomes cement clinker through preheating, decomposition, calcining, cooling;
4) K in calcination process in potassium felspar sand 2o evaporates, with the SO in high sulphur coal flue gas 2, CO 2chemical combination, first forms K 2sO 4, K 2cO 3, form potassium silicate and potassium aluminate after a while, concentrate in kiln ash with flue gas;
5) collected by high efficiente callback device above-mentioned containing potassium kiln ash, be processed into potash fertilizer.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.

Claims (1)

1. use potassium felspar sand to produce a method for cement and kiln ash potash fertilizer, it is characterized in that, it comprises following steps simultaneously;
1) by after Wingdale, sandstone, potassium felspar sand, iron powder and these raw material crushings of fluorite additive, prepare burden, in batching, the weight percent of each component is: Wingdale 72-77%, potassium felspar sand 17-20%, sandstone 2-6%, iron ore 2-4%, and fluorite additive 1-2%, the summation of each component percentages is 100%;
2) raw material powder after above-mentioned batching is worn into raw material, the granularity of raw material is 0.08-0.10mm;
3) above-mentioned raw material are mixed rear feeding kiln system, employing high sulphur coal is fuel, becomes cement clinker through preheating, decomposition, calcining, cooling;
4) K in calcination process in potassium felspar sand 2o evaporates, with the SO in high sulphur coal flue gas 2, CO 2chemical combination, first forms K 2sO 4, K 2cO 3, form potassium silicate and potassium aluminate after a while, concentrate in kiln ash with flue gas;
5) collected by high efficiente callback device above-mentioned containing potassium kiln ash, be processed into potash fertilizer.
CN201510336383.4A 2015-06-17 2015-06-17 Method for producing cement and cement kiln dust simultaneously through potassium feldspar Pending CN105314903A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109627055A (en) * 2019-02-15 2019-04-16 天津水泥工业设计研究院有限公司 A kind of additive and potassium-bearing mineral fertilizer for widening potassium-bearing mineral fertilizer firing range

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101585521A (en) * 2009-07-08 2009-11-25 昆明理工大学 Method for producing phosphoric acid and soluble potassium salt by phosphorus ore and potash feldspar
CN102531428A (en) * 2012-01-19 2012-07-04 洛阳水泥工程设计研究院有限公司 Device and method for co-production of cement and cement kiln dust by using potassium feldspar
CN102557050A (en) * 2011-12-20 2012-07-11 昆明冶金研究院 New process for comprehensively utilizing potassium feldspar
CN103193516A (en) * 2013-04-28 2013-07-10 雷志刚 Method for preparing potassium sulphate fertilizer and co-producing special cement from potassium rock
CN103193517A (en) * 2013-04-28 2013-07-10 雷志刚 Method for producing potassic fertilizer and co-producing special cement by utilizing potash feldspar
CN104528773A (en) * 2015-01-14 2015-04-22 湖南大学 Process for producing potassium carbonate co-production cement through potassium feldspar

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101585521A (en) * 2009-07-08 2009-11-25 昆明理工大学 Method for producing phosphoric acid and soluble potassium salt by phosphorus ore and potash feldspar
CN102557050A (en) * 2011-12-20 2012-07-11 昆明冶金研究院 New process for comprehensively utilizing potassium feldspar
CN102531428A (en) * 2012-01-19 2012-07-04 洛阳水泥工程设计研究院有限公司 Device and method for co-production of cement and cement kiln dust by using potassium feldspar
CN103193516A (en) * 2013-04-28 2013-07-10 雷志刚 Method for preparing potassium sulphate fertilizer and co-producing special cement from potassium rock
CN103193517A (en) * 2013-04-28 2013-07-10 雷志刚 Method for producing potassic fertilizer and co-producing special cement by utilizing potash feldspar
CN104528773A (en) * 2015-01-14 2015-04-22 湖南大学 Process for producing potassium carbonate co-production cement through potassium feldspar

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109627055A (en) * 2019-02-15 2019-04-16 天津水泥工业设计研究院有限公司 A kind of additive and potassium-bearing mineral fertilizer for widening potassium-bearing mineral fertilizer firing range
CN109627055B (en) * 2019-02-15 2021-09-14 天津水泥工业设计研究院有限公司 Additive for widening firing range of potassium-containing mineral fertilizer and potassium-containing mineral fertilizer

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Application publication date: 20160210