CN1069955A - Vertical kiln method for calcining cement with block material - Google Patents
Vertical kiln method for calcining cement with block material Download PDFInfo
- Publication number
- CN1069955A CN1069955A CN91105766A CN91105766A CN1069955A CN 1069955 A CN1069955 A CN 1069955A CN 91105766 A CN91105766 A CN 91105766A CN 91105766 A CN91105766 A CN 91105766A CN 1069955 A CN1069955 A CN 1069955A
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- China
- Prior art keywords
- kiln
- cement
- calcining
- material piece
- shaft kiln
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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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- Muffle Furnaces And Rotary Kilns (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Vertical kiln method for calcining cement with block material, the calcining process of genus Vertical Kiln for Cement Production flow process.The present invention change pellet calcining for honeycomb material piece forge around, to improve ventilation condition, utilize the furnace temperature natural ventilation, change back air quantity equilibrium, material chemical combination is complete, speed of response is fast, the grog cooling is also fast, can improve that shaft kiln cement produces, quality.
After adopting the material piece, shaft kiln palpus appropriate reconstruction, process facility will change, all existing corresponding scheme.
Description
Technical field: cement is main material of construction.Calcining process is the key link of manufacture of cement.The present invention is the invention of reform Cement Calcination in Vertical Kiln technology.
The present situation of cement burning technology: cement burning mainly contains rotary kiln and shaft kiln two big classes, and each class is divided a lot of kiln types again, all in constantly development improvement.Shaft kiln is divided into the machine shaft kiln of native shaft kiln and various ways.The machine shaft kiln is all used the pellet calcination method.The publication of publication cement technology mainly contains the cement of Beijing publication and the cement technology that publish Tianjin.34 pages of cement 90 years 12 phases, China's shaft kiln cement industrial front and future, can have an X-rayed the present situation of shaft kiln cement technology.
The purpose of invention: the big quality of rotary kiln cement output is good, but thermo-efficiency is low, and the cycle of founding the factory is long, and the per unit area yield investment is big.The shaft kiln cement stability is poor, and label is low and unstable.Purpose of the present invention is product, the quality that improves shaft kiln cement.The less investment of performance shaft kiln cement, found the factory fast, the advantage that thermo-efficiency is high, thus promote the great development of Cement industry.
Content: present Cement Calcination in Vertical Kiln technology, all adopt the pellet calcination method of continuing to use more than 100 year.(indivedual native shaft kilns also adopt more primary water mix raw material directly into the kiln calcining method) though from technological process many improvement are arranged, all do not break through pellet incinerating circle, thereby influence that shaft kiln cement produces, the raising of quality.General raw material become 10～15 millimeters of spherical diameter, measuring and calculating voidage 10～26%.Actual balling-up size is irregularity very, breaks up badly owing to transport with the rank of spreading, and the fried ball of drying course causes a part of space to be stopped up by the raw material powder.It is big and uneven to form ventilation resistance, though use sharp draft, still can not solve the uneven problem of air quantity of each section each point.Because the air quantity inequality, the product of calcination of chamotte, quality are all influenced, have also brought limit wind excessive, fiery partially, the kiln that collapses, even cause kiln spray accident.In a word, want to improve product, the quality of shaft kiln cement, key is to improve ventilation condition.
I confirm to break through pellet incinerating circle through studying intensively for a long time, adopt the good hollow material piece of the honeycombed calcination method of ventilation condition, correspondingly change its technological process, just can reach and improve the purpose that product, quality and save energy are increased the benefit.
The at present advanced tower machine shaft kiln of dish, production process is: raw material powder → give add water stirring → pan-pelletizer balling-up → rotary conveyor be transported to kiln hood top → spreader pellet is sprinkled in the kiln → roots blower air blast → kiln in the tower discharging machine fragmentation of calcining → dish through the dipleg discharging.
Process program of the present invention is: raw material powder → add water stirring → material formation of lots machine moulding → automatic demoulding loading of kiln → utilize calcining → reciprocating type cutting discharging machine discharging in high temperature natural ventilation → kiln in the kiln.
The old and new's process facility difference mainly is to have changed shaper and discharging machine.Material formation of lots machine is made up of casing, core pipe and vibrating grid.Charge pulp is through vibratory compaction, the automatic demoulding loading of kiln.Reciprocating type cutting discharging machine organic frame, screw block and knife rest are formed.Grog slips out kiln certainly through cutting and crushing.
The material piece generally is a monoblock, also can the polylith assembly unit, or fritter is in bulk.Material piece formal approximation is in honeycomb briquette, but the two effect is different, and cloth eye method, lumpiness size, forming method are all different.The material piece diameter of monoblock is bordering on kiln footpath, and cloth eye method becomes equilateral triangle, and limit portion suitably adjusts, and eye distance and aperture will be decided according to the kiln type, porosity according to the kiln height between 40-50%.
Shaft kiln must appropriate reconstruction behind the process reform.The kiln hood space is strengthened, and material formation of lots machine is installed on top.Without blower fan, without enclosed appts, discharging facility that need not old type changes newly-designed discharging machine under the kiln.Promptly constitute material piece machine shaft kiln after changing.
Give the meter result: because it is smooth and easy even to ventilate, thermal regulation is stable, and the material powder reacts completely, and speed of response is accelerated, and output and quality all can improve.Adopt the natural ventilation save energy, we opens discharge port, has improved the grog cooling environment, help improving the quality, and blower fan operational cost only, cement per ton can reduce cost more than 5 yuan.
Existing shaft kiln, kiln discharge grog stability is substantially all defective, and label is low and unstable, between 275 to 425, is No. 325 mostly generally, and implement the present invention and give the meter effect: (1) grog stability is qualified; (2) label is stable brings up to more than No. 525; (3) output improves 50-100%; (4) because output and quality improves, and production efficiency improves energy consumption and descends, economic benefit can be doubled and redoubled.
There are 6,000 to 7,000 tame shaft kiln cement plants in the whole nation, if can all implement the present invention, creates very big material wealth can for country.
After the shaft kiln cement label improves, substitute a part of rotary kiln cement, can save great amount of investment.
Implementation: can newly-built material piece machine shaft kiln, can transform existing various machine shaft kiln, most of native shaft kiln also can be transformed.The rotary kiln cement factory of small-sized wet production uses material piece machine shaft kiln instead, can receive less investment, the effect of high efficiency.
Claims (2)
1, vertical kiln method for calcining cement with block material: belong to cement calcinating process, it is characterized in that:
(1) existing shaft kiln is calcined with pellet, materials piece calcining of the present invention.
(2) the material piece becomes cellular, and the material piece diameter of monoblock is bordering on the kiln footpath, and cloth eye method is an equilateral triangle, and decide according to the kiln type in eye distance and aperture.Porosity 40～50%.
2, material piece machine shaft kiln: be the facility of implementing claim 1, it is characterized in that:
(1) without pan-pelletizer, use material formation of lots machine instead, be installed in the top of shaft kiln, charge pulp is through vibratory compaction, the automatic demoulding loading of kiln.
(2) discharging machine that kiln down need not old type is used reciprocating type cutting discharging machine instead.Grog slips out kiln certainly through cutting and crushing.
(3) natural ventilation, without blower fan, under the kiln without enclosed appts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91105766A CN1069955A (en) | 1991-08-22 | 1991-08-22 | Vertical kiln method for calcining cement with block material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91105766A CN1069955A (en) | 1991-08-22 | 1991-08-22 | Vertical kiln method for calcining cement with block material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1069955A true CN1069955A (en) | 1993-03-17 |
Family
ID=4907333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91105766A Pending CN1069955A (en) | 1991-08-22 | 1991-08-22 | Vertical kiln method for calcining cement with block material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1069955A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039407C (en) * | 1995-06-27 | 1998-08-05 | 国家建筑材料工业局南京水泥工业设计研究院 | Dry internal-combustion cement-producing technology and equipment |
-
1991
- 1991-08-22 CN CN91105766A patent/CN1069955A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039407C (en) * | 1995-06-27 | 1998-08-05 | 国家建筑材料工业局南京水泥工业设计研究院 | Dry internal-combustion cement-producing technology and equipment |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |