CN1112335C - Lithium silicon powder used as gypsum reinforcing agent and plastering gypsum containing same - Google Patents
Lithium silicon powder used as gypsum reinforcing agent and plastering gypsum containing same Download PDFInfo
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- CN1112335C CN1112335C CN00124973A CN00124973A CN1112335C CN 1112335 C CN1112335 C CN 1112335C CN 00124973 A CN00124973 A CN 00124973A CN 00124973 A CN00124973 A CN 00124973A CN 1112335 C CN1112335 C CN 1112335C
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The present invention provides lithium silicon powder (a gypsum reinforcing agent) and plastering gypsum containing the gypsum reinforcing agent. The waste slag and the lithium slag of a lithium saltworks are used as stuffing, cost is decreased, the waste slag and the lithium slag can also be used as a reinforcing agent of different gypsum to improve gypseous strength, for example, the waste slag and the lithium slag are used as a reinforcing agent of beta-semi-hydrated gypsum, and the strength of plastering gypsum prepared by the beta-semi-hydrated gypsum is higher than the strength of mixed phase plastering gypsum. The present invention has the advantages of simple processes, little investment and fast effects, one outlet for treating the waste slag of the lithium saltworks is arranged at the same time, and environmental pollution is reduced. Because the lithium silicon powder is used as the reinforcing agent and the stuffing, only hemihydrate gypsum can be used for preparing the plastering gypsum, construction effects are good, and speed is high.
Description
The present invention relates to a kind of gypsum reinforcing agent, contain gypsum of this toughener and preparation method thereof, particularly as the lithium silica flour of gypsum reinforcing agent, contain the gypsum, particularly plastering gupsum and preparation method thereof of lithium silica flour, belong to building material field.
The lithium slag is to be produced the by product that produces in the process of Quilonum Retard by triphane, its production process is when producing Quilonum Retard, triphane in rotary kiln through 1200～1300 ℃ temperature roasting, triphane is converted into the β type by the α type, β type triphane enters the cooler cooling, levigate, again material is delivered to the acidifying kiln, in the acidifying kiln, add dense H
2SO
4Carry out acidifying, β-triphane becomes Li
2SO
4, Li
2SO
4Go out the acidifying kiln after enter the pulp groove after the cooling, through operations such as leaching, filtration, washing, separation, generate Quilonum Retard, filter residue is the lithium slag.
Gypsum is general material of construction, is the main raw material of plastering gupsum, also can make various plasterings and be used for further decorating or construction.
Plastering gupsum is a kind of novel plastering material, and it has lightweight, high-strength, fire prevention, insulation, fast hard, characteristics such as strong, dimensional stabilizing early.The plastering gupsum cohesive force is strong, be difficult for falling ash, smooth surface exquisiteness, regulates indoor temperature and humidity automatically, belongs to green building material, is widely used in the bottoming and the cover of all kinds of bodies of wall, especially end face plaster ash less, hollowing cracking, speed of application is fast.Plastering gupsum roughly is divided into two classes at present: unipolar type plastering gupsum and mixing facies pattern plastering gupsum.The unipolar type plastering gupsum is to be single component with β-semi-hydrated gypsum, adds various adjustable solidification agents, water-holding agent and stopping composition preparation, principal feature is that technology is simple, cost is low, but intensity difference, time of coagulation instability, present less employing; Mix the facies pattern plastering gupsum and be mixed with β-semi-hydrated gypsum and II-anhydrite, principal feature is that intensity height, time of coagulation are stable, easily adjusting, easily construction, but technology relative complex, and facility investment is bigger, and cost is also higher.
Gypsum sheet material is added strongthener, is added and fill material and other auxiliary material machine system forms by gypsum, be used to prepare the gypsum of gypsum sheet material should label more than 10MPa, otherwise be difficult to reach the intensity of plasterboard needs.
Owing to be subjected to the restriction of above-mentioned condition, the gypsum that some qualities are poor, can not be used to make plastering gupsum, gypsum sheet material and other high strength gypsum goods as industry byproduct gypsum such as phosphogypsum, fluorgypsum, desulfurated plasters, can only use as more low-grade building materials (as adjusting congelation of cement).
The lithium slag only is applied in building materials in the cement at present as waste material, is used to reduce cost, improve the over-all properties of cement as filler, and the lithium slag is used for sand-cement slurry can substitute 20% cement, and the lithium slag is applied to not appear in the newspapers as yet in the gypsum.
The object of the present invention is to provide a kind of lithium silica flour, treated lithium slag is used for gypsum, improve the intensity of gypsum, make full use of waste residue, enlarge the purposes of low-grade gypsum, reduce environmental pollution as gypsum reinforcing agent.
Another object of the present invention is to provide a kind of plastering gupsum that contains the lithium silica flour, wherein contain common gypsum, by lithium silica flour and other admixture of lithium salts factory waste residue preparation, its intensity is much higher than the plastering gupsum of common gypsum preparation, and over-all properties is good.
A further object of the present invention is to provide a kind of preparation method who contains the plastering gupsum of lithium silica flour, and this method is utilized the lithium salts factory waste residue, adopts special process to handle, and has simplified the production technique of plastering gupsum, reduces the plastering gupsum production cost.
A further object of the present invention is to provide a kind of purposes of lithium silica flour gypsum reinforcing agent.
To achieve these goals, the present invention discloses a kind of gypsum reinforcing agent, it is characterized in that this toughener is for being produced the waste residue that produces in the Quilonum Retard process by triphane.Because the direct use properties of former slag of lithium slag is relatively poor, therefore at first handle the lithium slag among the present invention, lithium slag oven dry back is milled to the 100-400 order with super fine powder, screenings is less than 5%, lithium slag after the processing is referred to as the lithium silica flour, the lithium slag that is adopted among the present invention is handles the lithium slag, is called the lithium silica flour below.Because the lithium slags that the technology difference produces are also different, what acidization obtained is white, is referred to as white slag lithium silica flour, and what alkalization method obtained is yellow, is called speiss lithium silica flour.Because the production technique of lithium salts and technical qualification and aftertreatment are metastable, so the Chemical Composition of lithium slag and lithium silica flour is identical, character is also relatively stable, and the Chemical Composition of lithium slag and lithium silica flour sees Table 1:
Table 1
| SiO 2 | Al 2O 3 | CaO | MgO | SO 3 | Fe 2O 3 | |
| White slag (white slag lithium silica flour) | 21-24 | 6-9 | 53-58 | 1-3 | ||
| Speiss (speiss lithium silica flour) | 48-52 | 15-20 | 7-11 | 0.2-0.5 | 4-8 |
Wherein the chemical ingredients of speiss or speiss lithium silica flour is preferred: SiO
250.37, Al
2O
317.59 CaO 9.31, MgO 0.39.SO
36.6.
Because common building gypsum (β-semi-hydrated gypsum) difference in quality is bigger in the market, the present invention has selected then the different common building gypsum of several intensity, A. building material factory, B. second cement mill, C. phosphogypsum, D. fluorgypsum, F. desulfurated plaster (industrial waste gypsum), wherein the performance of A, B, C sees Table 2.
Table 2
| Time of coagulation (min) | 0.25mm square hole sieve tails over | Standard consistency | Ultimate compression strength | Folding strength | ||
| Initial set | Final set | |||||
| A. building material factory | 8’ | 10’ | ≤5.0 | 0.7 | 12.07 | 5.4 |
| B. second cement mill | 9’45″ | 11’30 | ≤5.0 | 0.5 | 19.4 | 8.7 |
| C. phosphogypsum | 7’ | 10’ | ≤5.0 | 0.85 | 6.0 | 2.5 |
In various gypsum, mix the mixture of white slag lithium silica flour, speiss lithium silica flour or two kinds of lithium silica flours respectively, find that the lithium silica flour all has tangible enhancement for various terra albas.When white slag lithium silicon powder doping quantity is the 5-10 weight part, the enhancing of various gypsum is reached the highest, along with the increase of volume, strength degradation, volume is when the 20-25 weight part, and intensity is similar to and reaches blank test specimen.When speiss lithium silicon powder doping quantity is the 5-15 weight part, the enhancing of various gypsum is reached the highest, along with the increase of volume, strength degradation, even but the volume of speiss lithium silica flour is 30 weight parts, the intensity of gypsum still is higher than blank test specimen.The enhancement of speiss lithium silica flour is greater than white slag lithium silica flour, and speiss lithium silica flour intensity is maximum to increase by 60%, and white slag lithium silica flour intensity is maximum to increase by 40%, and volume intensity when the 30 weight part left and right sides reaches basically identical.But the volume of lithium silica flour is the 1-25 weight part in the gypsum, is preferably the 3-15 weight part.Mix respectively in low-grade gypsum such as phosphogypsum, fluorgypsum and industrial waste gypsum that 10 weight parts are white, behind the speiss lithium silica flour, intensity can be increased to 8-13Mpa by original 3-6Mpa.In vain, speiss lithium silica flour also can mix and mix in the various gypsum, and various gypsum are all had enhancement.After adding lithium silica flour toughener in the electromicroscopic photograph discovery common gypsum, variation has taken place in its microtexture.
Further, the invention provides a kind of plastering gupsum that contains the lithium silica flour, comprise: gypsum, lithium silica flour and retardant, water-holding agent, exciting agent, if desired, can also add admixtures such as water reducer and softening agent, described gypsum can be a common gypsum, i.e. β-semi-hydrated gypsum, II-anhydrite and suitable other gypsum of the present invention, preferably β-semi-hydrated gypsum.
The rate of set of gypsum is very fast, speiss lithium silica flour is little to influence time of coagulation of gypsum, and ground-slag also has blood coagulation enhancing effect, standard-required according to plastering gupsum, should mix retardant to satisfy the operational requirement of plastering, because the admixture retardant is more serious to loss of strength, find by test, singly mix a certain retardant effect and bad, particularly singly mix citric acid, along with the increase of volume, intensity sharply descends, therefore adopt compound retarder among the present invention, this compound retarder has solved the matching relationship of slow setting and intensity well, and the intensity that makes plastering gupsum is far above standard.
Because the kind difference of body of wall, its water-intake rate difference is bigger, the bigger body of wall of water-absorbent particularly, when plastering gupsum was wiped one's face construction, the water in the plastering gupsum is very fast to be absorbed by body of wall, causes the plastering gupsum dehydration too fast, quick setting very, owing to there is not complete aquation, the lower even efflorescence of plastering gupsum intensity adds water-holding agent and can make plastering gupsum have good water retention property.
Because major ingredient is SiO in the lithium silica flour
2, Al
2O
3, CaO, wherein SiO
2The overwhelming majority is with unbodied SiO
2Form exists, thereby makes the lithium silica flour have good active, so among the present invention, in the common building gypsum, mix in the lithium silica flour, also mix an amount of activity excitant, the activity of lithium silica flour is given full play to, make it further to gain in strength with the gypsum effect.
In the lithium silica flour type plastering gupsum that contains lithium silica flour toughener of the present invention, employed admixture is respectively: retardant mainly is hydroxycarboxylate, tensio-active agent, phosphoric acid salt etc., comprise two or more the combination of Tripotassium Citrate, tartrate, Trisodium Citrate, phosphoric acid and sodium salt and rotten protein etc., the combination of optimization citric acid salt and two kinds of retardant of tartrate, the most preferably combination of the Tripotassium Citrate of 0.25 weight part and two kinds of retardant of 0.01 weight part tartrate; Water-holding agent comprises one or more the combination of methylcellulose gum, ethyl cellulose, hypromellose, ethylmethylcellulose, polyvinyl acetate (PVA), cellulose acetate, gelatin, dextrin, Microcrystalline Cellulose, polymethyl acrylate, polyacrylic ester, hydroxyethylmethyl-cellulose, Natvosol; Activity excitant is ordinary Portland cement and is fit to other cement of the present invention; Water reducer is ordinary water-reducing agent, various high efficiency water reducing agent, or the combination of the two, as: naphthalene sulfonate condenses, melamine sulfonate condenses, modified lignin mahogany sulfonate or β-naphthalene sulfonate condenses and suitable other compound of the present invention.In order to improve of the influence of lithium silica flour toughener, can also add talcum powder or other raw material similar to the talcum powder performance to the workability of plastering gupsum.In the time of necessary, can add softening agent.
The essentially consist of plastering gupsum of the present invention and prescription are (weight part):
Terra alba: 75-99
Lithium silica flour: 1-25
Talcum powder: 1-5
Retardant: 0.1-0.3
Water-holding agent: 0.1-0.3
Exciting agent: 2-12
Water reducer: 0-1
Preferred prescription is (weight part):
Terra alba: 80-95
Lithium silica flour: 3-15
Talcum powder: 1-5
Methylcellulose gum: 0.15
Tripotassium Citrate: 0.25
Tartrate: 0.01
Cement: 2-10
Water reducer: 0-1
Wherein the lithium silica flour can be white slag lithium silica flour, speiss lithium silica flour or the mixture of the two.
The preparation method of lithium silica flour plastering gupsum of the present invention is: at first handle the lithium slag, lithium slag oven dry back is milled to the 100-400 order with super fine powder, screen over-size＜5%, Gypsum Mine is added admixtures such as above-mentioned lithium ground-slag, retardant, water-holding agent, exciting agent, water reducer after through thick broken, thin broken, frying, ageing, grinding, in proportion raw material is given mixed, mix through mixer again, promptly obtain lithium silica flour type plastering gupsum of the present invention.
The present invention utilizes the lithium salts factory waste residue to carry out suitable art breading, and the lithium silica flour that obtains has not only reduced the cost of gypsum as filler, can also improve the intensity of various gypsum as the toughener of gypsum, has enlarged the purposes of low grade gypsum.Contain in the common gypsum of lithium silica flour gypsum reinforcing agent, add other suitable filler admixture, can obtain lithium silica flour type plastering gupsum with simple method, its intensity reaches the intensity of mixed phase plastering gupsum, but production technique is simple, the less investment instant effect, be simultaneously the processing of lithium salts factory waste residue many an approach, and reduce environmental pollution.
Because the lithium silica flour has enhancement to plaster of Paris, can improve the intensity of various gypsum, can enlarge the range of application of gypsum, lithium silica flour gypsum reinforcing agent can be applied to as from the levelling gypsum, thermal insulation mortar and high strength gypsum goods, the while has also further been reduced the cost of said products.
Describe the present invention in detail below in conjunction with the drawings and specific embodiments.
Description of drawings:
Fig. 1 is the process flow sheet of preparation lithium silica flour of the present invention and plastering gupsum;
Fig. 2 is the common building gypsum, i.e. the electromicroscopic photograph figure of β-semi-hydrated gypsum;
Fig. 3 is the electromicroscopic photograph figure that white slag lithium silica flour of the present invention strengthens gypsum;
Fig. 4 is the electromicroscopic photograph figure that speiss lithium silica flour of the present invention strengthens gypsum.
Be specific embodiments of the invention below, described embodiment is used to describe the present invention, rather than restriction the present invention.
Embodiment 1-8
At first handle the lithium slag, lithium slag oven dry back is milled to 200 orders with super fine powder, screen over-size＜5%, Gypsum Mine is added above-mentioned lithium ground-slag after through thick broken, thin broken, frying, ageing, grinding, according to the ratio that table 3 provides, the common building gypsum A that weighing is an amount of, add an amount of white slag lithium silica flour, mix through mixer again, the common building gypsum that contains lithium silica flour gypsum reinforcing agent that obtains, intensity results sees Table 3.
Table 3
| Volume (weight part) | Ultimate compression strength (MPa) | Folding strength (MPa) | ||
| A building material factory | White slag lithium silica flour | |||
| Comparative example 1 | 100 | 0 | 12.0 | 5.4 |
| Embodiment 1 | 99 | 1 | 14.2 | 5.9 |
| Embodiment 2 | 97 | 3 | 15.4 | 6.9 |
| Embodiment 3 | 95 | 5 | 16.1 | 7.2 |
| Embodiment 4 | 90 | 10 | 15.3 | 7.9 |
| Embodiment 5 | 85 | 15 | 14.6 | 6.9 |
| Embodiment 6 | 80 | 20 | 13.8 | 6.5 |
| Embodiment 7 | 76 | 24 | 10.7 | 5.7 |
| Embodiment 8 | 70 | 30 | 8.8 | 4.4 |
By table 3 as seen, when in common gypsum A, adding the lithium silica flour of 5-20 weight part, its ultimate compression strength and folding strength obviously improve, but increase along with lithium silica flour amount, when consumption surpasses 20 weight parts, its ultimate compression strength and folding strength intensity all obviously descend, and lithium silica flour consumption approached the blank assay of comparative example 1 at 24% o'clock.Determine that by the foregoing description the amount that adds the lithium silica flour in the gypsum is generally 1-25, preferred 1-20. is the 3-15 weight part most preferably.
Embodiment 9-17
Adopt the method for embodiment 1-8,, in common gypsum A, add speiss lithium silica flour, measure intensity, the results are shown in Table 4 according to the ratio of table 4.
Table 4
| Volume (weight part) | Ultimate compression strength (Mpa) | Folding strength (MPa) | ||
| The A of building material factory | Speiss lithium silica flour | |||
| Comparative example 1 | 100 | 12.0 | 5.4 | |
| Embodiment 9 | 99 | 1 | 14.5 | 6.2 |
| Embodiment 10 | 98 | 2 | 15.8 | 7.0 |
| Embodiment 11 | 97 | 3 | 17.4 | 7.9 |
| Embodiment 12 | 95 | 5 | 19.0 | 9.0 |
| Embodiment 13 | 90 | 10 | 17.1 | 7.9 |
| Embodiment 14 | 85 | 15 | 15.0 | 7.3 |
| Embodiment 15 | 80 | 20 | 16.7 | 6.4 |
| Embodiment 16 | 76 | 24 | 14.2 | 5.4 |
| Embodiment 17 | 70 | 30 | 8.5 | 4.1 |
By embodiment 9-17 as can be seen, add the speiss lithium silica flour of 1-25 in the gypsum, the intensity of gypsum all is significantly improved, speiss lithium silica flour amount surpasses 25 weight parts, strength degradation, but the volume of speiss lithium silica flour often is the 1-25 weight part, preferred 1-20 weight part, most preferably 3-15 weight part.
Embodiment 18-26
Adopt the method for embodiment 1-17, the ratio according to table 5 provides adds white slag lithium silica flour in common gypsum B, measure intensity, the results are shown in Table 5.
Table 5
| Ratio (weight part) | Ultimate compression strength (MPa) | Folding strength (MPa) | ||
| B second cement mill | White slag lithium silica flour | |||
| Comparative example 2 | 100 | 19.4 | 8.7 | |
| Embodiment 19 | 99 | 1 | 20.1 | 8.6 |
| Embodiment 20 | 97 | 3 | 21.8 | 7.9 |
| Embodiment 21 | 95 | 5 | 22.9 | 7.0 |
| Embodiment 22 | 90 | 10 | 25.5 | 7.6 |
| Embodiment 23 | 85 | 15 | 24.6 | 9.0 |
| Embodiment 24 | 80 | 20 | 21.8 | 6.9 |
| | 76 | 24 | 20.5 | 6.5 |
| Embodiment 26 | 70 | 30 | 17.5 | 6.5 |
Embodiment 27-35
Adopt the method for embodiment 1-17, the ratio according to table 6 provides adds speiss lithium silica flour in common gypsum B, measure intensity and see Table 6.
Table 6
| Ratio (weight part) | Ultimate compression strength | Folding strength | ||
| B second cement mill | Speiss lithium silica flour | |||
| Comparative example 2 | 100 | 19.4 | 8.7 | |
| Embodiment 27 | 99 | 1 | 26.0 | 8.9 |
| Embodiment 28 | 97 | 3 | 27.7 | 9.0 |
| Embodiment 29 | 95 | 5 | 28.8 | 9.2 |
| Embodiment 30 | 92 | 8 | 28.5 | 9.1 |
| Embodiment 31 | 90 | 10 | 24.4 | 5.6 |
| Embodiment 32 | 85 | 15 | 23.6 | 5.4 |
| Embodiment 33 | 80 | 20 | 24.2 | 5.9 |
| Embodiment 34 | 76 | 24 | 24.7 | 7.3 |
| Embodiment 35 | 70 | 30 | 20.4 | 5.7 |
Embodiment 36-47
Adopt the method for embodiment 1-18,, in phosphogypsum, add white slag lithium silica flour and speiss lithium silica flour respectively, measure intensity, the results are shown in Table 7,8 according to the ratio that table 6 provides.
Table 7
| Table 7 ratio (weight part) | Ultimate compression strength (MPa) | Folding strength (MPa) | ||
| Phosphogypsum | White slag lithium silica flour | |||
| Comparative example 3 | 100 | 6.0 | 2.3 | |
| Embodiment 36 | 95 | 5 | 7.9 | 2.8 |
| Embodiment 37 | 90 | 10 | 8.1 | 3.2 |
| Embodiment 38 | 85 | 15 | 7.4 | 2.8 |
| Embodiment 39 | 80 | 20 | 6.8 | 2.3 |
| Embodiment 40 | 76 | 24 | 5.9 | 2.2 |
| Embodiment 41 | 70 | 30 | 5.1 | 1.8 |
Table 8
| Volume (weight part) | Ultimate compression strength (Mpa) | Folding strength (MPa) | ||
| Phosphogypsum | Speiss lithium silica flour | |||
| Comparative example 3 | 100 | 6.0 | 2.3 | |
| Embodiment 42 | 95 | 5 | 9.5 | 3.4 |
| Embodiment 43 | 90 | 10 | 11.1 | 3.5 |
| Embodiment 44 | 85 | 15 | 10.8 | 3.2 |
| Embodiment 45 | 80 | 20 | 9.2 | 3.0 |
| Embodiment 46 | 70 | 30 | 5.5 | 2.2 |
| Embodiment 47 | 60 | 40 | 4.2 | 1.6 |
Embodiment 48-56
Adopt the method for embodiment 1-18, add white slag lithium silica flour and speiss lithium silica flour respectively in phosphogypsum and industrial waste gypsum, measure the intensity of the gypsum that obtains respectively, the result sees Table 9,10 respectively.
Table 9
| Ratio (weight part) | Ultimate compression strength (MPa) | Folding strength (MPa) | ||
| Fluorgypsum | White slag lithium silica flour | |||
| Comparative example 4 | 100 | 6.0 | 2.3 | |
| Embodiment 48 | 95 | 5 | 7.8 | 2.8 |
| Embodiment 49 | 90 | 10 | 8.2 | 3.2 |
| Embodiment 50 | 80 | 20 | 7.1 | 2.6 |
| Embodiment 51 | 70 | 30 | 5.8 | 2.1 |
Table 10
| Volume (weight part) | Ultimate compression strength (Mpa) | Folding strength (MPa) | ||
| Fluorgypsum | Speiss lithium silica flour | |||
| Comparative example 5 | 100 | 6.0 | 2.3 | |
| Embodiment 52 | 95 | 5 | 9.3 | 3.5 |
| Embodiment 53 | 90 | 10 | 11.8 | 3.6 |
| Embodiment 54 | 80 | 20 | 10.9 | 3.3 |
| Embodiment 55 | 70 | 30 | 9.4 | 3.1 |
| Embodiment 56 | 60 | 40 | 6.0 | 2.4 |
Embodiment 57-67
Adopt the method for the foregoing description, in the second gypsum B of Building Materials Factory, add speiss lithium silica flour and white slag lithium silica flour simultaneously, measure its intensity, the results are shown in Table 11.
Table 11
| Ratio (weight part) | Ultimate compression strength (MPa) | Folding strength (MPa) | |||
| Second Building Materials Factory | White slag lithium silica flour | Speiss lithium silica flour | |||
| Comparative example 2 | 100 | 19.4 | 8.7 | ||
| Embodiment 57 | 99 | 0.5 | 0.5 | 24.8 | 8.9 |
| Embodiment 58 | 97 | 1.5 | 1.5 | 26.7 | 9.0 |
| Embodiment 59 | 95 | 0.5 | 4.5 | 28.6 | 9.2 |
| Embodiment 60 | 92 | 0.5 | 7.5 | 28.3 | 9.1 |
| Embodiment 61 | 92 | 1.0 | 7.0 | 27.6 | 9.1 |
| Embodiment 62 | 92 | 4.0 | 4.0 | 26.5 | 9.0 |
| Embodiment 63 | 92 | 6.0 | 2.0 | 25.2 | 9.0 |
| Embodiment 64 | 90 | 1.0 | 10 | 24.4 | 7.8 |
| Embodiment 65 | 85 | 7.5 | 7.5 | 23.3 | 7.0 |
| Embodiment 66 | 80 | 10 | 10 | 23.0 | 6.5 |
| Embodiment 67 | 70 | 15 | 15 | 19.0 | 6.0 |
Embodiment 68-76
According to the method for the foregoing description, the lithium silica flour is ground to form different fineness, add among the gypsum A, the ratio of the two is lithium silica flour 10 weight parts, gypsum 90 weight parts are measured its intensity, the results are shown in Table 12.
Table 12
| Fineness (order) | Ultimate compression strength (Mpa) | Folding strength (MPa) | ||
| White slag lithium ground-slag | Speiss lithium ground-slag | |||
| Comparative example 1 | 100 | 12.0 | 5.4 | |
| Embodiment 68 | 100 | 14.2 | 6.5 | |
| Embodiment 69 | 100 | 16.5 | 7.0 | |
| Embodiment 70 | 250 | 15.8 | 8.1 | |
| Embodiment 71 | 250 | 17.6 | 8.5 | |
| Embodiment 72 | 300 | 16.9 | 8.2 | |
| Embodiment 73 | 300 | 18.7 | 8.5 | |
| Embodiment 74* | 200 | 300 | 19.2 | 8.6 |
| Embodiment 75* | 300 | 200 | 18.6 | 8.4 |
| Embodiment 76* | 400 | 300 | 19.8 | 8.5 |
* speiss lithium silica flour and white slag lithium silica flour each 5%.
By table 1-12 as can be seen, the lithium silica flour all has tangible enhancement for the gypsum of varying strength, and the enhancing amplitude is roughly the same; Volume reaches the highest at the 5-10 weight part, along with the increase of volume, and strength degradation, a bounce-back has appearred in volume about the 20-25 weight part, and intensity is similar to and reaches blank test specimen; The enhancement of speiss lithium silica flour is greater than white slag lithium silica flour, and speiss lithium silica flour is maximum to strengthen 60%, and white slag lithium silica flour is maximum to strengthen 40%, and volume intensity when the 30 weight part left and right sides reaches basically identical.Therefore the lithium silica flour can be used as gypsum reinforcing agent, is used to strengthen various gypsum.The volume of lithium silica flour in gypsum is the 1-25 weight part, and preferred volume is the 1-20 weight part, and most preferably volume is the 3-15 weight part.White slag lithium silica flour and speiss lithium silica flour also can mix and mix in the gypsum, and along with the increase of speiss lithium silica flour consumption, the intensity of gypsum improves, and further improves the intensity of gypsum; The fineness of lithium silica flour also influences the intensity of terra alba, and the fineness of lithium ground-slag is big more, mix in the gypsum after, the intensity of gypsum is big more, considers the grinding cost, the fineness of preferred lithium silica flour is 200 orders.
Embodiment 77-83
Adopt the method for the foregoing description, in gypsum, add exciting agent cement, change the ratio of exciting agent cement, measure the ultimate compression strength and the folding strength of the enhancing gypsum that obtains, see Table 13 according to the amount of table 13.
Table 13
| Ratio (weight part) | Ultimate compression strength (MPa) | Folding strength (MPa) | ||||
| The gypsum A of building material factory | White slag lithium silica flour | Speiss lithium silica flour | Cement | |||
| Comparative example 1 | 100 | 0 | 0 | 0 | 12.0 | 5.4 |
| Embodiment 77 | 80 | 20 | 0 | 5 | 13.5 | 6.8 |
| Embodiment 78 | 80 | 20 | 0 | 8 | 18.1 | 7.2 |
| Embodiment 79 | 80 | 20 | 0 | 12 | 13.3 | 6.5 |
| Embodiment 80 | 80 | 0 | 20 | 5 | 18.9 | 7.8 |
| Embodiment 81 | 80 | 0 | 20 | 8 | 17.1 | 6.9 |
| Embodiment 82 | 80 | 0 | 20 | 12 | 19.9 | 7.9 |
Because major ingredient is SiO in the lithium silica flour
2, Al
2O
3, CaO, wherein SiO
2The overwhelming majority is with unbodied SiO
2Form exists, thereby makes the potassium silica flour have good active, so the present invention in the lithium silica flour, mixes an amount of activity excitant in mixing in the common building gypsum, the activity of lithium silica flour is given full play to, test-results such as following table:
Evidence, exciting agent can make lithium silica flour type plastering gupsum intensity further improve.Maximum strength can improve 20-30% again by original basis.
Embodiment 83-88
At first handle the lithium slag, lithium slag oven dry back will be milled to 200 orders with super fine powder, and screen over-size (5%, add retardant, water-holding agent, exciting agent and other admixture according to the ratio of table 14 and obtain Preblend; Gypsum Mine is added in the above-mentioned Preblend after through thick broken, thin broken, frying, ageing, grinding, mix through mixer again, obtain lithium silica flour type plastering gupsum after mixing, measure the intensity of the lithium silica flour type plastering gupsum that obtains, the results are shown in Table 14.
Table 14
| Weight (kilogram) | Embodiment 83 | Embodiment 84 | Embodiment 85 | Embodiment 86 | Embodiment 87 | Embodiment 88 | |
| Gypsum | 80 | 95 | 90 | 85 | 75 | 80 | |
| The lithium silica flour | White slag lithium silica flour speiss lithium silica flour | 20 | 5 | 10 | 15 | 25 | 10 10 |
| Retardant | The Tripotassium Citrate tartrate Trisodium Citrate sodium phosphate protein that goes bad | 0.25 0.01 | 0.25 0.01 | 0.15 0.2 | 0.1 0.2 | 0.01 0.25 | 0.01 0.25 |
| Water-holding agent | Methylcellulose gum ethylmethylcellulose polyvinyl acetate (PVA) cellulose acetate gelatin Natvosol | 0.15 | 0.15 | 0.1 0.1 | 0.15 | 0.2 | 0.3 |
| Exciting agent | Ordinary Portland cement | 12 | 8 | 2 | 2 | 8 | |
| Water reducer | Naphthalene sulfonate condenses melamine sulfonate condenses modified lignin mahogany sulfonate β naphthalene sulfonate condenses | 1 | 1 | 0.5 | 0.1 | 0.5 0.5 | |
| Talcum powder | 3 | 3 | 2 | 4 | 1 | 5 | |
| Ultimate compression strength MPa | 13.3 | 15.0 | 14.5 | 12 | 11.8 | 15.2 | |
Wherein, the strength property of the plastering gupsum of embodiment 83,84 sees Table 15, and table 15 gives the performance of the plastering gupsum of common plastering gupsum product and national Specification.
Table 15
| Fineness (tailing over %) | Time of coagulation | 7 days ultimate compression strength | Remarks | ||||
| 2.5mm square hole sieve | 0.2mm square hole sieve | Initial set (hour) | Final set (hour) | Resistance to compression MPa | Anti-folding Mpa | Water conservation degree (mm) | |
| Embodiment 83 | 0 | 12 | 1.33 | 1.46 | 10.4 | 3.9 | Φ64 |
| Embodiment 84 | 0 | 12 | 1.38 | 1.45 | 13.3 | 4.6 | Φ60 |
| Mix facies pattern | 0 | 12-20 | ＞1 | ＜8 | 5.5 | 3.2 | Φ66 |
| The JC/T517-93 standard | 0 | ≤40 | ≥1h | ≤8 | ≥5.0 | ≥3.0 | |
| Plaster of Paris | 8min | 10min | 12.1 | 5.4 | ≤5.0 | Φ116 | |
By table 14-15 as can be seen, with the lithium silica flour as toughener and stopping composition, add retardant again, water-holding agent, exciting agent, if desired, can also add admixtures such as water reducer and softening agent, only just can prepare plastering gupsum with semi-hydrated gypsum, the intensity of the plastering gupsum that contains toughener that obtains is higher than the plastering gupsum product of prior art far away, and it is low to have cost, invest little, simplify technology, make full use of industrial residue, reduce the pollution of waste residue to environment, and construction effect is good, fireballing advantage, be high-quality green building material, have good economic benefit and social benefit.
This product application is on exterior wall, and through exposing to the weather of one winter an of summer, it is freezing to drench with rain, and does not find any variation.
Comparative example 5
Select 20 weight part lithium silica flour admixtures, 80 weight part plaster of Paris A for use, make test specimen 4 * 4 * 16cm, carry out Electronic Speculum and contraction test.
Actual measurement lithium silica flour type plastering gupsum 30 days maximum contraction rate: mix speiss lithium silica flour rate of expansion 0.49mm/m, mix white slag lithium silica flour shrinking percentage 0.42mm/m, all less than the shrinkage value of cement.
Fig. 2 is the common building gypsum, i.e. the electromicroscopic photograph figure of β-semi-hydrated gypsum; Fig. 3 is the electromicroscopic photograph figure that white slag lithium silica flour of the present invention strengthens gypsum; Fig. 4 is the electromicroscopic photograph figure that speiss lithium silica flour of the present invention strengthens gypsum.Can be clear that by Electronic Speculum, the hardenite of semi-hydrated gypsum mainly is by aquation true tumor (dihydrate gypsum) xln porous reticulated structure that is connected to form intersected with each other, its crystal habit such as needle-like, at admixture behind the lithium silica flour, what form also is the porous reticulated structure, but needles is thicker, and out-of-shape, having block and irregular material to generate and be connected in needles reaches among the netted hole between each needles, make the hole in the reticulated structure tight relatively, this situation is mixed in the electromicroscopic photograph of speiss lithium silica flour especially obvious at Fig. 4.The Chemical Composition (table 1 sees before) of contrast lithium silica flour is the SiO in the lithium silica flour as can be seen
2, Al
2O
3, CaO with the semi-hydrated gypsum hydration reaction after, generate hydrated calcium silicate, calcium sulphoaluminate, lithium aluminates etc. make the reticulated structure densification, so lithium silica flour plastering gupsum intensity is higher than semi-hydrated gypsum, (estimate a small amount of Li in this main and lithium silica flour as for the xln chap
2CO
3Effect relevant), further research awaits.
Claims (9)
1, a kind of lithium silica flour is made the purposes of gypsum reinforcing agent, it is characterized in that this lithium silica flour is formed with the super fine powder mill then by the waste residue drying that produces in the triphane production Quilonum Retard process, and its fineness is the 100-400 order, and screen over-size is less than 5%.
2, the described lithium silica flour of claim 1 as gypsum reinforcing agent, it is characterized by described waste residue is that acidization is produced the waste residue that produces in the Quilonum Retard process, its color is a white, is white slag.
3, the described lithium silica flour of claim 1 as gypsum reinforcing agent, it is characterized by described waste residue is that alkalization method is produced the waste residue that produces in the Quilonum Retard process, its color is yellow, is speiss.
4, a kind of plastering gupsum that contains toughener lithium silica flour is to be mixed together by adding white slag lithium silica flour, talcum powder, retardant, water-holding agent, exciting agent, water reducer in the gypsum, it is characterized in that each component proportioning (in parts by weight) is as follows:
Terra alba: 75-99
Lithium silica flour: 1-25
Talcum powder: 1-5
Retardant: 0.1-0.3
Water-holding agent: 0.1-0.3
Exciting agent: 2-12
Water reducer: 0-1
Wherein said retardant is a Tripotassium Citrate, tartrate, Trisodium Citrate, phosphoric acid and sodium salt thereof and rotten proteinic two or more combination, described water-holding agent is a methylcellulose gum, ethyl cellulose, hypromellose, ethylmethylcellulose, polyvinyl acetate (PVA), cellulose acetate, gelatin, dextrin, Microcrystalline Cellulose, polymethyl acrylate, polyacrylic ester, hydroxyethylmethyl-cellulose, the combination of one or more of Natvosol, described exciting agent is an ordinary Portland cement, and described water reducer is the naphthalene sulfonate condenses, the melamine sulfonate condenses, modified lignin mahogany sulfonate, the combination of one or more of β-naphthalene sulfonate condenses.
5, the described enhancing plastering gupsum of claim 4, wherein said gypsum is common building gypsum, phosphogypsum, fluorgypsum or desulfurated plaster.
6, the described enhancing plastering gupsum of claim 4, wherein said lithium silica flour are the white slag lithium silica flour that the waste residue grinding of acidization production Quilonum Retard generation forms.
7, the described enhancing plastering gupsum of claim 4, wherein said lithium silica flour are the speiss lithium silica flour that the waste residue grinding of alkalization method production Quilonum Retard generation forms.
8, the described enhancing plastering gupsum of claim 4, wherein said lithium silica flour are that acidization is produced white slag lithium silica flour that waste residue grinding that Quilonum Retard produces forms and alkalization method and produced the speiss lithium silica flour that waste residue grinding that Quilonum Retard produces forms.
9, the described enhancing plastering gupsum of claim 4, wherein said retardant is Tripotassium Citrate and tartaric combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN00124973A CN1112335C (en) | 2000-09-27 | 2000-09-27 | Lithium silicon powder used as gypsum reinforcing agent and plastering gypsum containing same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00124973A CN1112335C (en) | 2000-09-27 | 2000-09-27 | Lithium silicon powder used as gypsum reinforcing agent and plastering gypsum containing same |
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|---|---|
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| CN1112335C true CN1112335C (en) | 2003-06-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105399391A (en) * | 2015-11-27 | 2016-03-16 | 武汉青江化工黄冈有限公司 | Method for preparing gypsum plaster from titanium gypsum |
| CN105985050A (en) * | 2015-12-19 | 2016-10-05 | 济南源盛化工科技有限公司 | Retarding gypsum additive |
| CN107860723A (en) * | 2017-11-02 | 2018-03-30 | 上海市建筑科学研究院 | A kind of yellowing method of testing of plastering gupsum |
| CN109650758B (en) * | 2018-12-17 | 2021-07-06 | 湖北工业大学 | Nano early strength agent for cement or 3D printing gypsum |
| CN109400102A (en) * | 2018-12-21 | 2019-03-01 | 山东天玉墙体工程有限公司 | A kind of plastering gupsum |
| CN110436876A (en) * | 2019-09-10 | 2019-11-12 | 深圳市青青源科技有限公司 | A kind of green and healthy natural type lightweight plastering gupsum and preparation method thereof |
| CN114591014A (en) * | 2022-03-09 | 2022-06-07 | 云南特雅建材科技有限公司 | High-strength water-resistant plastering gypsum synthesis agent and application thereof |
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