CN1085196A - The technique for activation burning of high-alumina cement and white cement - Google Patents
The technique for activation burning of high-alumina cement and white cement Download PDFInfo
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- CN1085196A CN1085196A CN 92111013 CN92111013A CN1085196A CN 1085196 A CN1085196 A CN 1085196A CN 92111013 CN92111013 CN 92111013 CN 92111013 A CN92111013 A CN 92111013A CN 1085196 A CN1085196 A CN 1085196A
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- cement
- alumina
- raw material
- white
- activating agent
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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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
- C04B7/421—Inorganic materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention is the technique for activation burning of high-alumina cement and white cement, is characterized in admixture chemical activating agent in cement slurry, the cement clinker that consists of this kind of activator and corresponding industrial residue, and rock ore deposits etc. are made into one or more; Making the high-alumina cement addition content is 2～7% of high-alumina cement raw material, and activator requirement Al mixes in institute
2O
3Content is preferably in more than 30%; Making white cement activator addition content is 2～8% of white cement raw material, requires its Fe
2O
3Content does not influence the whiteness of white cement.Adopt present technique cement firing temperature to descend 50 ℃～150 ℃ cement outputs raisings more than 13%, economize on coal more than 14%.
Description
The present invention relates to the calcining technology of high-alumina cement and white cement, belong to the special cement production field.
High aluminium cement clinker can be used to grind fire-resistant gelling material, express hard or rapid hardening cement, low alkalinity cement, microdilatancy and expansive cement, self-stressing cement, colored cement also can be used to make water purification agent etc., along with development and national economy, the requirement of high-alumina cement increases year by year, high-alumina cement is in calcination process, and firing range is narrow, ties bulk easily, easily cause the kiln ring formation, influence yield and quality.
White cement can be used for the top-grade building engineering, and requirement is also more and more big, the trend that presents that supply falls short of demand, because the white cement iron-holder has only some thousandths of, liquid phase is few and viscosity is big when burning till, and the energy consumption height, output is also low.
Improve the output of above two material cement, essential its method for calcinating that improves, reduce firing temperature, improve speed of response, in Cement industry, be extensive use of fluorine sulphur mineralizer burning silicate cement at present, and receive the reduction firing temperature, the good result that improves yield and quality and cut down the consumption of energy, but for factory away from gypsum, the fluorite place of production, because transportation cost height, these mineral can not get timely supply, and adopt these complex ore agents very high to the accuracy requirement of batching homogeneity and addition content; If blending is inhomogeneous and the inaccurate cement setting unstable properties that easily causes of volume.The complexification mineralizer technology is not used for high-alumina cement production so far as yet, is not widely used in the white cement production yet.
The court's application number that proposed in October, 90 is 90108199X, name is called the patent application of " adding the technology that crystal seed improves cement kiln calcining efficacy ", mention in the calcining process of existing silicate cement, make crystal seed with cement clinker or silicate cement finished product, add in the raw material behind the grinding, go into the kiln calcining, can reach the effect that improves the cement burning effect, but there is limitation in the formulation of crystal seed, has consequently limited in force to have the application of fluxing with the mineralization material in a large number.And the grog or the cement that add this kind merely is used as " crystal seed ", and for the bigger cement of liquid phase viscosity, effect is not so good, and many with grog, the cost height.
Task of the present invention is low by adding a small amount of cost in high alumina and white cement calcination process, the chemical activation agent of convenient sources (also can be described as the mineralizer of fluxing), quicken to burn till reaction to reach, reduce the purpose of these two kinds of cement firing temperatures, to increase high alumina and white cement output, cut down the consumption of energy.
The present invention is introduced into this notion of chemical activation in the cement calcinating process first, chemical activation is meant to have on a small quantity by admixture and fluxes and the material of mineralization reaches and quickens to burn till reaction, reduce the purpose of firing temperature, material as chemical activating agent, it can be cement clinker, also can be industry byproduct or rock ore deposit, as severally adding simultaneously above, its effect is better, and has saved cement clinker, the cement of different varieties, can adopt the activator of different varieties, according to phase transition temperature on the physical chemistry with other compositions mix and the universal law that reduces, other compositions of calcination process admixture, the raw material fusing point is reduced, liquid phase early occurs, and the surface tension and the viscosity of liquid phase are lower, helps the diffusion and the migration of reactive ion, for example, in the most basic C-S-A-F system, it is 1338 ℃ that temperature appears in liquid phase, in containing the C-S-A-F-M system of 5%MgO, this temperature is 1301 ℃, is 1280 ℃ in the C-S-A-F-M-N system.In addition, burn till and exist the eutectic microcell that the multiple oxide compound much lower than the raw material fusing point formed in the grog, thereby can reduce temperature of reaction, fast reaction speed is in the high-alumina cement sintering process, at CA
2And C
12A
7The activation energy that the particle contact surface forms CA is 84KCalMOL
-1, the activation energy that Wingdale and alumina mixture directly form CA is 89.8KCaLMOL
-1
Because the liquid phase viscosity of high-alumina cement and white cement is big, only adds its grog as activator, effect is not remarkable, as adding the waste residue or the rock ore deposit of fluxing with mineralization is arranged again, and can obviously reach volume increase, energy-conservation effect; And because of high-alumina cement and white cement clinker cost height, difficult again mill, the waste residue or the rock ore deposit that have activation as part or all of usefulness replace, and can reduce the expense that adds chemical activating agent greatly.
Calcining is during high-alumina cement, adds 2%～7% chemical activating agent of raw material amount, activator consist of high aluminium cement clinker, aluminous fly-ash, the high alumina ash, wollastonite, high alumina kiln ash, high alumina industrial residue, the high alumina coal gangue, resinous shale etc. are made into one or more.Above material requires Al
2O
3Content is more than 30%.
Calcining adds the chemical activating agent of raw material amount 2%～8% during white cement, activator consist of white cement clinker, wollastonite, white slag or slag, gypsum, fluorite, basalt, diabase etc. are made into one or more, above material requires Fe
2O
3Content is low, does not influence or influence less the whiteness value of white cement.
The adulteration method of chemical activating agent can add and the common grinding of raw material at bistrique, also grinding separately, mix with raw material then, than the independent grinding of wanting of difficult mill, blending is entered then, admixture chemical activating agent calcining technology can be used for rotary kiln or shaft kiln, down-draft kiln, kiln types such as tunnel furnace.
During with admixture chemical activating agent burning high-alumina cement, it is more higher that the basicity factor of batching is wanted, and when being used in the calcining white cement, it is more higher that the lime saturation factor of batching is wanted.The raw material fineness is thin more good more, and the amount of admixture is wanted suitably, and lacking that activation effect is good adds, the activation effect difference add, add what material, suit measures to local conditions, contain the many and low person of fusing point of element kind, activation effect is good, it is few and the high person's activation effect of fusing point is poor to contain amount of element.
Advantage of the present invention and effect
[1] adopt present technique, the cement firing temperature descends 50 ℃～150 ℃, and cement output improves can reach more than 13% energy-conservation reaching more than 14%.
[2] suit measures to local conditions, adopt local rock ore deposit and waste residue cheap and easy to get, can use no or little grog, reduce cost.
Below be embodiments of the invention.
Example 1: high-alumina cement production, adopting high alumina is the activator calcining, with the listed raw bauxite composition of table 1, admixture levigated high-alumina powder clinker (one-tenth is respectively in table 1) accounts for 2.5% of raw material amount, go into rotary kiln and be sintered into high alumina at 1380 ℃～1420 ℃, its performance sees Table 2, mixes and do not mix high alumina, under the constant situation of calcining temperature, label all reaches 625
#, mix high alumina, the kiln unit-hour output improves 5.8%, and coal consumption descends 6.1%.
Example 2: high-alumina cement production, adopting high alumina and flyash is the chemical activating agent calcining, and its raw ingredients and production technique and example 1 are same, and the chemical activating agent composition is: 2% high alumina+4% aluminous fly-ash (chemical ingredients sees Table 1), burning till the grog performance and see Table 2, is 625
#, the kiln unit-hour output improves 8.2%, and coal consumption descends 9.0%.
Example 3: it is the activator calcining that white cement clinker is adopted in white cement production, with the listed white cement raw ingredients of table 1, admixture 5% white cement clinker powder (chemical ingredients sees Table 1) is gone into rotary kiln 1470 ℃～1570 ℃ calcinings, unit-hour output improves 8.0%, economizes on coal 9.1%.Cement mark 425
#
Example 4: it is activator that white cement clinker+fluorite is adopted in white cement production, raw ingredients and example 3 are together, admixture 5% white cement clinker and 0.5% fluorite powder (chemical ingredients sees Table 1), calcining temperature can be reduced to 1420 ℃～1520 ℃, the kiln unit-hour output improves 12.3%, economize on coal 15.1%, clinker quality sees Table 3, label 425
#
Example 5: it is the activator calcining that white cement clinker 4%+ wollastonite 2% is adopted in white cement production, and technology and raw ingredients and example 3 are same, and chemical ingredients sees Table 1, burns till the grog performance and sees Table 3, label 425
#, unit-hour output improves 13.2%, energy-conservation 14.0%.
Chemical component table 1
| Title | Loss | SiO 2 | TiO 2 | Fe 2O 3 | Al 2O 3 | CaO | MgO | CaF 2 | ∑ |
| Raw bauxite | 28.40 | 2.31 | 1.73 | 1.01 | 39.44 | 26.17 | 0.74 | 99.80 | |
| High alumina | 0.42 | 7.73 | 2.76 | 1.70 | 50.18 | 35.11 | 1.29 | 99.19 | |
| Flyash | 3.45 | 50.51 | 0.25 | 10.25 | 30.35 | 4.10 | 0.90 | 99.81 | |
| Common meal | 35.91 | 5.46 | 0.12 | 3.65 | 44.70 | 0.06 | 99.90 | ||
| White grog | 0.52 | 23.41 | 0.31 | 5.32 | 69.59 | 0.42 | 99.57 | ||
| Fluorite | 0.98 | 16.11 | 0.06 | 0.34 | 1.13 | 80.10 | |||
| Wollastonite | 50.42 | 0.91 | 0.65 | 44.95 | 1.21 | 98.14 |
Claims (6)
1, a kind of high-alumina cement chemical activation calcining technology, it is characterized in that: admixture accounts for the chemical activating agent of raw material amount 2～7% in the high-alumina cement raw material; Chemical activating agent consist of high aluminium cement clinker, aluminous fly-ash, the high alumina ash, wollastonite, high alumina kiln ash, the high alumina industrial residue, the high alumina coal gangue, resinous shale etc. are made into one or more.
2, high-alumina cement chemical activation calcining technology according to claim 1 is characterized in that containing Al in the described chemical activating agent
2O
3More than 30%.
3,, it is characterized in that described chemical activating agent is made into by high alumina that accounts for raw material amount 2% and the aluminous fly-ash that accounts for raw material amount 4% according to claim 1 and 2 described high-alumina cement chemical activation calcining technologies.
4, a kind of white cement chemical activation calcining technology, it is characterized in that: admixture accounts for the chemical activating agent of raw material amount 2～8% in the white cement raw material; Chemical activating agent consist of white cement clinker, wollastonite, white slag or slag, gypsum, fluorite, basalt, diabase etc. are made into one or more.
5,, it is characterized in that the Fe of described chemical activating agent according to the described white cement chemical activation of claim 4 calcining technology
2O
3Content is low, does not influence the whiteness value of white cement.
6,, it is characterized in that described chemical activating agent is made into by white cement clinker that accounts for raw material amount 4% and the wollastonite that accounts for raw material amount 2% according to claim 4 and 5 described white cement chemical activation calcining technologies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92111013 CN1085196A (en) | 1992-09-26 | 1992-09-26 | The technique for activation burning of high-alumina cement and white cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92111013 CN1085196A (en) | 1992-09-26 | 1992-09-26 | The technique for activation burning of high-alumina cement and white cement |
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| Publication Number | Publication Date |
|---|---|
| CN1085196A true CN1085196A (en) | 1994-04-13 |
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|---|---|---|---|
| CN 92111013 Pending CN1085196A (en) | 1992-09-26 | 1992-09-26 | The technique for activation burning of high-alumina cement and white cement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141837A (en) * | 2014-08-13 | 2014-11-12 | 迁安市津唐球墨铸管有限公司 | Manufacturing method of high Al cement-ZnAl alloy nodular cast iron water supply and drainage pipe |
| CN114014569A (en) * | 2021-11-15 | 2022-02-08 | 吴联权 | Production process for separating and recycling metal smelting furnace slag |
-
1992
- 1992-09-26 CN CN 92111013 patent/CN1085196A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141837A (en) * | 2014-08-13 | 2014-11-12 | 迁安市津唐球墨铸管有限公司 | Manufacturing method of high Al cement-ZnAl alloy nodular cast iron water supply and drainage pipe |
| CN104141837B (en) * | 2014-08-13 | 2016-04-13 | 迁安市津唐球墨铸管有限公司 | The production method of high Al cement-ZnAl alloy nodular cast iron supplying drainage |
| CN114014569A (en) * | 2021-11-15 | 2022-02-08 | 吴联权 | Production process for separating and recycling metal smelting furnace slag |
| CN114014569B (en) * | 2021-11-15 | 2022-08-02 | 吴联权 | Production process for separating and recycling metal smelting furnace slag |
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