CN105670059A - Silicon-calcium slag, silicon-calcium slag-based rubber filler, and preparation method thereof - Google Patents
Silicon-calcium slag, silicon-calcium slag-based rubber filler, and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a silicon-calcium slag with main components of Si and Ca. The slag also contains a small amount of Al. With the total weight of the silicon-calcium slag as a reference, when Si, Ca and Al elements are calculated based on SiO2, CaO and Al2O3, the content of SiO2 is 35-40wt%, the content of CaO is 35-40wt%, and the content of Al2O3 is 1-6wt%. The molar ratio of Ca/Si+Al is 0.7-0.9. The invention also discloses a preparation method of the silicon-calcium slag and the silicon-calcium slag prepared with the method. The invention also discloses a silicon-calcium slag-based rubber filler, a preparation method thereof, and the silicon-calcium slag-based rubber filler prepared with the method. The silicon-calcium slag-based rubber filler provided by the invention has a reinforcing effect equivalent to that of white carbon black. With the filler, a prepared rubber product is provided with relatively high breaking strength, tensile breaking strength, tear elongation at break, and the like. The method also has the advantages of simple process, wide source, and low cost. With the method, the preparation cost of rubber products can be substantially reduced.
Description
Technical field
The present invention relates to a kind of calcium silicate slag prepared from industrial residu, specifically, relate to calcium silicate slag prepared by the alkaline process residue of aluminum-extracted from aluminum-containing mineral or waste residue and the calcium silicate slag base gum filler produced based on this and the preparation method of calcium silicate slag and calcium silicate slag base gum filler.
Background technology
In rubber preparation process, it is necessary to add multiple filler to strengthen the performance of rubber. The most important filler of one of which is white carbon, and it can strengthen the reinforcing property of rubber, namely improves the disruptive force of rubber, fracture tensile strength, tearing percentage elongation etc., makes rubber have practical value. But white carbon is on the high side, add the preparation cost of rubber. It is, thus, sought for the cheap gum filler of white carbon can be substituted.
Flyash is the inevitable outcome of coal-fired power plant, is the single industrial solid castoff of Largest In China. Aluminum-extracted pulverized fuel ash mainly has acid system and the big class of alkaline process two, by activation decomposed powder coal ash under the specified conditions such as acid or alkali, makes sial be separated. Residue of aluminum-extracted after aluminum-extracted pulverized fuel ash is cheap, wide material sources, if it is possible to is rationally used, turns waste into wealth, and can greatly improve the added value of aluminum-extracted pulverized fuel ash.
Summary of the invention
It is an object of the invention to provide a kind of new gum filler with reinforcing property, with the white carbon that alternative cost is high. The present invention is with the alkaline process residue of aluminum-extracted of aluminum-containing mineral or waste residue, for instance flyash alkaline process residue of aluminum-extracted, as raw material, has been prepared calcium silicate slag, and prepared calcium silicate slag base gum filler with this.
On the one hand, the invention provides a kind of calcium silicate slag, this calcium silicate slag be mainly composed of Si and Ca, possibly together with a small amount of Al, with the gross weight of calcium silicate slag for benchmark, Si, Ca, Al element is respectively with SiO2、CaO、Al2O3Meter, SiO2The content that content is 35-40 weight %, CaO be 35-40 weight %, Al2O3The mol ratio that content is 1-6 weight %, Ca/Si+Al be 0.7-0.9.
Second aspect, the invention provides a kind of calcium silicate slag base gum filler, this filler be mainly composed of the calcium silicate slag that particle diameter is 600-1500 order, described calcium silicate slag be mainly composed of Si and Ca, possibly together with a small amount of Al, with the gross weight of calcium silicate slag for benchmark, Si, Ca, Al element is respectively with SiO2、CaO、Al2O3Meter, SiO2The content that content is 35-40 weight %, CaO be 35-40 weight %, Al2O3The mol ratio that content is 1-6 weight %, Ca/Si+Al be 0.7-0.9.
The third aspect, the preparation method that the invention provides a kind of calcium silicate slag, described method includes: the alkaline process residue of aluminum-extracted of aluminum-containing mineral or waste residue is carried out dealkalize process in alkali liquor, wherein, aluminum-containing mineral or waste residue are preferably flyash, described alkali liquor is at least one solution in sodium carbonate, industrial caustic soda, industry weight alkali, calcium hydroxide and Calx, it is preferred to sodium hydroxide solution.
Fourth aspect, the invention provides calcium silicate slag prepared by method as above.
5th aspect, the preparation method that the invention provides a kind of calcium silicate slag base gum filler, described method includes: calcium silicate slag is crushed to 600-1500 order, wherein, described calcium silicate slag be mainly composed of Si and Ca, possibly together with a small amount of aluminum, with the gross weight of calcium silicate slag for benchmark, Si, Ca, Al element is respectively with SiO2、CaO、Al2O3Meter, SiO2The content that content is 35-40 weight %, CaO be 35-40 weight %, Al2O3The mol ratio that content is 1-6 weight %, Ca/Si+Al be 0.7-0.9; Preferably, the dominant of described calcium silicate slag is tobermorite mutually.
6th aspect, the invention provides calcium silicate slag base gum filler prepared by method as above.
The calcium silicate slag base gum filler of the present invention, has the reinforcing effect suitable with white carbon, it is possible to makes the rubber of preparation have higher disruptive force, fracture tensile strength, tearing percentage elongation etc., makes rubber have practical value; And the calcium silicate slag base gum filler of the present invention, preparation technology is simple, and wide material sources are cheap, it is possible to significantly reduce the cost of manufacture of rubber.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Fig. 1 is the X ray powder diffraction pattern of the calcium silicate slag of the embodiment of the present invention 1 preparation.
Fig. 2 is the graph of pore diameter distribution of the calcium silicate slag of the embodiment of the present invention 1 preparation.
Fig. 3 is the particle size distribution figure of the calcium silicate slag of the embodiment of the present invention 1 preparation.
Fig. 4 is 1000 orders and the size distribution curve of 3500 order calcium silicate slags.
Fig. 5 is the SEM collection of illustrative plates of different grain size calcium silicate slag, and wherein, (a) is the SEM collection of illustrative plates of the calcium silicate slag without super pulverizing; B () is for being crushed to the SEM collection of illustrative plates of the calcium silicate slag of 1000 orders; C () is for being crushed to the SEM collection of illustrative plates of the calcium silicate slag of 3500 orders.
Detailed description of the invention
Hereinafter the specific embodiment of the present invention is described in detail. It should be appreciated that detailed description of the invention described herein is merely to illustrate and explains the present invention, it is not limited to the present invention.
On the one hand, the invention provides a kind of calcium silicate slag, this calcium silicate slag be mainly composed of Si and Ca, possibly together with a small amount of Al, with the gross weight of calcium silicate slag for benchmark, Si, Ca, Al element is respectively with SiO2、CaO、Al2O3Meter, SiO2The content that content is 35-40 weight %, CaO be 35-40 weight %, Al2O3The mol ratio that content is 1-6 weight %, Ca/Si+Al be 0.7-0.9.
The dominant phase composition of the calcium silicate slag of the present invention is preferably tobermorite. Tobermorite is a kind of stratiform afwillite mineral, orthorhombic system, and its a kind of molecular formula is Ca5Si6O16(OH)2·4H2O. Part Si in structure4+Can by Al3+Substituting, replacement amount reaches as high as more than 10 weight %.
In the preferred embodiment of the present invention, the dominant phase composition of calcium silicate slag is tobermorite, and namely Si and the Ca in calcium silicate slag exists with the form of tobermorite, and the molecular formula of tobermorite is Ca5Si6O16(OH)2·4H2O, wherein part Si4+By Al3+Substituting, namely define aluminum tobermorite, its molecular formula is Ca5Si5Al(OH)O17·5H2O, in addition with a small amount of calcite, its molecular formula is CaCO3。
Second aspect, the invention provides a kind of calcium silicate slag base gum filler, and this filler contains the calcium silicate slag that particle diameter is 600-1500 order.This calcium silicate slag be mainly composed of Si and Ca, possibly together with a small amount of Al, with the gross weight of calcium silicate slag for benchmark, Si, Ca, Al element is respectively with SiO2、CaO、Al2O3Meter, SiO2The content that content is 35-40 weight %, CaO be 35-40 weight %, Al2O3Content be 1-6 weight %. And the mol ratio of Ca/Si+Al is 0.7-0.9.
Preferably, the dominant phase composition of above-mentioned calcium silicate slag is tobermorite, and namely Si and the Ca in calcium silicate slag exists with the form of tobermorite, and the molecular formula of tobermorite is Ca5Si6O16(OH)2·4H2O, wherein part Si4+By Al3+Substituting, namely define aluminum tobermorite, its molecular formula is Ca5Si5Al(OH)O17·5H2O, in addition with a small amount of calcite, its molecular formula is CaCO3。
It was found by the inventors of the present invention that the particle diameter of above-mentioned calcium silicate slag is 600-1500 order, during as gum filler, the reinforcing effect suitable with white carbon can be played, produce the rubber with practical value. Preferably, when the particle diameter of calcium silicate slag reaches 800-1200 order, its specific surface area reaches 300-400m2/ g, reinforcing effect improves further.
The third aspect, the preparation method that the invention provides a kind of calcium silicate slag, the method includes: the alkaline process residue of aluminum-extracted of aluminum-containing mineral or waste residue is carried out dealkalize process in alkali liquor, wherein, aluminum-containing mineral or waste residue are preferably flyash, alkali liquor is at least one solution in sodium carbonate, industrial caustic soda, industry weight alkali, calcium hydroxide and Calx, it is preferred to sodium hydroxide solution.
It will be understood by those skilled in the art that dealkalize processes and be typically in hermetic container to carry out.
Described alkaline process residue of aluminum-extracted contains substantial amounts of silicon and calcium, possibly together with substantial amounts of alkali, can obtain from Ti Lv factory as side-product, and such cost reduces further. The technique alkaline process of aluminum-containing mineral or waste residue being carried to aluminum does not have any restriction, it is possible to adopt alkaline process commonly used in the art to put forward aluminum technique. Various alkaline process commonly used in the art carry the residue of aluminum and can be used in the present invention.
In the art, for the dealkalize of alkaline process residue of aluminum-extracted, it is typically in water and carries out. But dealkalize in water, dealkalize speed is slow, and along with the rising of temperature, dealkalize speed can be accelerated, but there will be the phenomenon that residue expands. The present inventor finds under study for action, and the alkaline process residue of aluminum-extracted of aluminum-containing mineral or waste residue is carried out dealkalize process in alkali liquor, and dealkalize speed is fast, and dealkalize rate is high, and does not have residue expansion issues.
Alkali liquor commonly used in the art may be incorporated for the dealkalize of the present invention and processes, such as, at least one solution in sodium carbonate, industrial caustic soda (sodium hydroxide), industry weight alkali (sodium bicarbonate), calcium hydroxide and Calx, it is preferred to sodium hydroxide solution.
In the inventive method, the condition that dealkalize processes preferably includes: concentration of lye is 20-100g/L, more preferably 60-100g/L; Temperature is 100-200 DEG C, more preferably 130-180 DEG C; Time is 0.5-2h, more preferably 1-1.5h; Liquid-solid mass ratio is 3-6, more preferably 4-5; Pressure is 0.1-1.5MPa, more preferably 0.27-1.0MPa. Under above-mentioned preferable case, it is possible to improve dealkalize rate further, make the calcium silicate slag prepared have better strengthening action.
Fourth aspect, the invention provides calcium silicate slag prepared by method as above.
The calcium silicate slag prepared by method as above can be met and is mainly composed of Si and Ca, and possibly together with a small amount of Al, with the gross weight of calcium silicate slag for benchmark, Si, Ca, Al element is respectively with SiO2、CaO、Al2O3Meter, SiO2The content that content is 35-40 weight %, CaO be 35-40 weight %, Al2O3The mol ratio that content is 1-6 weight %, Ca/Si+Al be 0.7-0.9.
5th aspect, the preparation method that the invention provides a kind of calcium silicate slag base gum filler, the method includes: calcium silicate slag is crushed to 600-1500 order, wherein, calcium silicate slag be mainly composed of Si and Ca, possibly together with a small amount of Al, with the gross weight of calcium silicate slag for benchmark, Si, Ca, Al element is respectively with SiO2、CaO、Al2O3Meter, SiO2The content that content is 35-40 weight %, CaO be 35-40 weight %, Al2O3The mol ratio that content is 1-6 weight %, Ca/Si+Al be 0.7-0.9.
In the preferred embodiment of the present invention, Si and the Ca in calcium silicate slag exists with the form of tobermorite, and the molecular formula of tobermorite is Ca5Si6O16(OH)2·4H2O, wherein part Si4+By Al3+Substituting, namely define aluminum tobermorite, its molecular formula is Ca5Si5Al(OH)O17·5H2O, in addition with a small amount of calcite, its molecular formula is CaCO3。
The method according to the invention, as long as calcium silicate slag as above is crushed to 600-1500 order, adds in rubber formulation as reinforcing agent, can play the reinforcing effect suitable with white carbon, produce the rubber with practical value. But under preferable case, when calcium silicate slag is crushed to 800-1200 order, it is possible to improve the reinforcing effect of the calcium silicate slag base gum filler prepared further.
6th aspect, the invention provides calcium silicate slag base gum filler prepared by method as above.
In the present invention, another technical effect is that after residue of aluminum-extracted dealkalize process, its whiteness improves. Flyash alkaline process residue of aluminum-extracted is a kind of bolarious powder, if thought of as gum filler, particularly colorful rubber filler, it is necessary to improve its whiteness.
In the present invention, it is preferable that the alkali collection in alkaline process residue of aluminum-extracted is recycled, thus reducing process costs further.
It will be understood by those skilled in the art that it is contemplated that substitute white carbon as gum filler with the calcium silicate slag base gum filler of the present invention, to reach to have suitable strengthening action and cost-effective purpose with white carbon. Therefore, for preparing other raw materials of rubber and method without particular/special requirement, it is possible to adopt various raw materials commonly used in the art and method.
Embodiment
The present invention is further illustrated for below example, but and is not so limited the present invention.
In the following Examples and Comparative Examples:
Flyash alkaline process residue of aluminum-extracted composition is as follows: unit: weight %
| SiO2 | Al2O3 | TFe2O3 | CaO | Na2O | TiO2 |
| 27.53 | 1.88 | 2.21 | 28.57 | 27.05 | 2.01 |
Super pulverizing: adopt micropowder comminution to pulverize.
The chemical composition analysis method of calcium silicate slag: full chemical analysis method.
Embodiment 1
The present embodiment is for calcium silicate slag base gum filler that the present invention is described and preparation method thereof.
In hermetic container, flyash alkaline process residue of aluminum-extracted being carried out in the sodium hydroxide solution of 80g/L dealkalize process, treatment temperature is 160 DEG C, and the time is 1h, and the liquid-solid mass ratio of sodium hydroxide solution and flyash alkaline process residue of aluminum-extracted is 5. Reaction pressure is the saturated vapor pressure at this temperature. Obtaining calcium silicate slag after dealkalize, the chemical composition analysis result of calcium silicate slag is in Table 1.
The X ray powder diffraction pattern of calcium silicate slag is shown in that Fig. 1, graph of pore diameter distribution are shown in that Fig. 2, particle size distribution figure are shown in that Fig. 3, SEM collection of illustrative plates is shown in Fig. 5 (a).
Then the calcium silicate slag superfine flour obtained being broken to 1000 orders, the size distribution curve obtaining calcium silicate slag base gum filler A1, A1 is shown in that Fig. 4, SEM collection of illustrative plates is shown in Fig. 5 (b).
It will be seen from figure 1 that the dominant phase composition of the calcium silicate slag obtained after flyash alkaline process residue of aluminum-extracted dealkalize is tobermorite, wherein there is part Si4+By Al3+Substitute.
Figure it is seen that calcium silicate slag size distribution ranges for 3-84nm, average pore size is 28.465nm, in conjunction with Fig. 5, it can be determined that the hole in calcium silicate slag is the Secondary Channel that tobermorite thin slice fibrous crystal intersects to form.
From figure 3, it can be seen that the particle size distribution of calcium silicate slag ranges for 0.594-310 μm, D [4,3] is 55.4 μm, and Dv10 is 7.27 μm, and Dv50 is 41.2 μm, and Dv90 is 121 μm.
From Fig. 3, Fig. 4 and Fig. 5 it can be seen that calcium silicate slag is the aggregate with burr, aggregate is made up of the interspersed intertexture of thin slice fibrous crystal of 0.1-5 μm wide, there is more space between crystal. Destructurized through the calcium silicate slag sheet-like fiber of extra-fine grinding PROCESS FOR TREATMENT, particle diameter has obvious reduction, and therefore, specific surface area will enlarge markedly. And from figure 5 it can be seen that be crushed in the calcium silicate slag of 1000 orders and 3500 orders substantially without bulk flaky crystal, but it is crushed into small crystallization.
Embodiment 2
The present embodiment is for calcium silicate slag base gum filler that the present invention is described and preparation method thereof.
In hermetic container, flyash alkaline process residue of aluminum-extracted being carried out in the sodium hydroxide solution of 60g/L dealkalize process, treatment temperature is 130 DEG C, and the time is 1.2h, and the liquid-solid ratio of sodium hydroxide solution and flyash alkaline process residue of aluminum-extracted is 4. Reaction pressure is the saturated vapor pressure at this temperature. Obtaining calcium silicate slag after dealkalize, the chemical composition analysis result of calcium silicate slag is in Table 1.
The X ray powder diffraction pattern of calcium silicate slag is similar with Fig. 1, and graph of pore diameter distribution is similar with Fig. 2, and particle size distribution figure is similar with Fig. 3, and SEM collection of illustrative plates is similar with (a) in Fig. 5.
Then the calcium silicate slag superfine flour obtained is broken to 800 orders, obtains calcium silicate slag base gum filler A2.
Embodiment 3
The present embodiment is for calcium silicate slag base gum filler that the present invention is described and preparation method thereof.
In hermetic container, flyash alkaline process residue of aluminum-extracted being carried out in the sodium hydroxide solution of 100g/L dealkalize process, treatment temperature is 180 DEG C, and the time is 1.5h, and the liquid-solid ratio of sodium hydroxide solution and flyash alkaline process residue of aluminum-extracted is 3. Reaction pressure is the saturated vapor pressure at this temperature. Obtaining calcium silicate slag after dealkalize, the chemical composition analysis result of calcium silicate slag is in Table 1.
The X ray powder diffraction pattern of calcium silicate slag is similar with Fig. 1, and graph of pore diameter distribution is similar with Fig. 2, and particle size distribution figure is similar with Fig. 3, and SEM collection of illustrative plates is similar with (a) in Fig. 5.
Then the calcium silicate slag superfine flour obtained is broken to 1200 orders, obtains calcium silicate slag base gum filler A3.
Embodiment 4
The present embodiment is for calcium silicate slag base gum filler that the present invention is described and preparation method thereof.
Calcium silicate slag base gum filler is prepared according to the method for embodiment 1, the difference is that, the calcium silicate slag superfine flour obtained is broken to 600 orders, obtains calcium silicate slag base gum filler A4.
Embodiment 5
The present embodiment is for calcium silicate slag base gum filler that the present invention is described and preparation method thereof.
Calcium silicate slag base gum filler is prepared according to the method for embodiment 1, the difference is that, the calcium silicate slag superfine flour obtained is broken to 1500 orders, obtains calcium silicate slag base gum filler A5.
Embodiment 6
The present embodiment is for calcium silicate slag base gum filler that the present invention is described and preparation method thereof.
Calcium silicate slag base gum filler is prepared according to the method for embodiment 1, the difference is that, the concentration of sodium hydroxide solution is 20g/L.
The chemical composition analysis result of calcium silicate slag is in Table 1.
Then the calcium silicate slag superfine flour obtained is broken to 1000 orders, obtains calcium silicate slag base gum filler A6.
Embodiment 7
The present embodiment is for calcium silicate slag base gum filler that the present invention is described and preparation method thereof.
Calcium silicate slag base gum filler is prepared according to the method for embodiment 1, the difference is that, the temperature that dealkalize processes is 100 DEG C, and the time is 0.5h, and the liquid-solid ratio of sodium hydroxide solution and flyash alkaline process residue of aluminum-extracted is 4. Reaction pressure is the saturated vapor pressure at this temperature. Calcium silicate slag is obtained after dealkalize.
The chemical composition analysis result of calcium silicate slag is in Table 1.
Then the calcium silicate slag superfine flour obtained is broken to 1000 orders, obtains calcium silicate slag base gum filler A7.
Comparative example 1
Calcium silicate slag base gum filler is prepared according to the method for embodiment 1, the difference is that, using the calcium silicate slag without super pulverizing that obtains after dealkalize as calcium silicate slag base gum filler D1.
Comparative example 2
Calcium silicate slag base gum filler is prepared according to the method for embodiment 1, the difference is that, the calcium silicate slag superfine flour obtained is broken to 3500 orders, obtains calcium silicate slag base gum filler D2. The size distribution curve of D2 is shown in that Fig. 4, SEM collection of illustrative plates is shown in Fig. 5 (c).
The chemical composition analysis result (unit: weight %) of table 1 calcium silicate slag
| SiO2 | Al2O3 | TFe2O3 | CaO | Na2O | |
| Embodiment 1 | 37.04 | 4.8 | 2.87 | 37.33 | 0.32 |
| Embodiment 2 | 37.17 | 4.92 | 2.71 | 37.21 | 1.82 |
| Embodiment 3 | 37.17 | 4.71 | 2.77 | 36.97 | 1.5 |
| Embodiment 4 | 37.04 | 4.8 | 2.87 | 37.33 | 0.32 |
| Embodiment 5 | 37.04 | 4.8 | 2.87 | 37.33 | 0.32 |
| Embodiment 6 | 35.47 | 4.33 | 2.48 | 35.61 | 4.64 |
| Embodiment 7 | 34.49 | 4.25 | 2.39 | 34.53 | 7.5 |
| Comparative example 1 | 37.04 | 4.8 | 2.87 | 37.33 | 0.32 |
| Comparative example 2 | 37.04 | 4.8 | 2.87 | 37.33 | 0.32 |
Preparation example
First carry out plasticating within the scope of 25-30 DEG C of roller temperature and when roll spacing 0.1mm 5min by 100g butadiene-styrene rubber, again respectively by 50gA1-A7, D1-D2 and 100g broken-down rubber, 1g altax, 1g stearic acid, after 3g zinc oxide and 1.75g sulfur mix homogeneously, the mixing 10min when roller temperature scope 50-55 DEG C and roll spacing 0.5mm, again film is put into after calendering formation and mould is pressed in vulcanizing press under 145 DEG C and 10MPa pressure and vulcanizes 25min, obtain rubber R1-R7 and R1 '-R2 ', and set not filled and do filler with white carbon rubber B1 and B2.
Test case
Disruptive force, fracture tensile strength, tearing percentage elongation: carry out according to GB/T528-1998.
Measuring the disruptive force of above-mentioned each rubber, fracture tensile strength and tearing percentage elongation respectively, result is in Table 2.
Table 2
According to table 2, R1-R7 be can be seen that respectively compared with R1 ', R2 ', B1, the calcium silicate slag base gum filler of the present invention, the calcium silicate slag obtained by residue of aluminum-extracted dealkalize is crushed to 600-1500 order, add in rubber formulation as reinforcing agent, the disruptive force of rubber, fracture tensile strength and tearing percentage elongation can be improved. R1 and R2 ' is compared and can be seen that, when calcium silicate slag is ground to 3500 order, the reinforcing effect of rubber is declined to a great extent on the contrary, it is meticulous that this is likely due to powder body, can cause that its specific surface area is excessive, when surface can very high be susceptible to powder reuniting, therefore not pulverize more thin more be beneficial to reinforcing rubber. R1 and B2 is compared it can be seen that the calcium silicate slag base gum filler of the present invention is added in rubber formulation as reinforcing agent, there is the reinforcing effect suitable with white carbon.
Wherein, particle diameter respectively 1000,800,1200 order of the calcium silicate slag base gum filler of R1-R3, its strengthening action is better. R1 is compared respectively it can be seen that when the particle diameter of calcium silicate slag is 800-1200 order with R4 and R5, it is possible to improve the strengthening action of calcium silicate slag base gum filler further; R1 and R6 is compared it can be seen that the concentration of sodium hydroxide solution is 60-100g/L, it is possible to improve the strengthening action of the calcium silicate slag base gum filler prepared further;R1 and R7 is compared it can be seen that the condition that dealkalize processes includes: temperature is 130-180 DEG C, and the time is 1-1.5h, and liquid-solid ratio is 4-5, it is possible to improve the strengthening action of the calcium silicate slag base gum filler prepared further.
The calcium silicate slag base gum filler of the present invention, has the reinforcing effect suitable with white carbon, it is possible to makes the rubber of preparation have higher disruptive force, fracture tensile strength, tearing percentage elongation etc., makes rubber have practical value; And the calcium silicate slag base gum filler of the present invention, preparation technology is simple, and wide material sources are cheap, it is possible to significantly reduce the cost of manufacture of rubber.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing; but; the present invention is not limited to the detail in above-mentioned embodiment; in the technology concept of the present invention; technical scheme can being carried out multiple simple variant, these simple variant belong to protection scope of the present invention.
It is further to note that, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, it is possible to be combined by any suitable mode, in order to avoid unnecessary repetition, various possible compound modes are no longer illustrated by the present invention separately.
Additionally, can also carry out combination in any between the various different embodiment of the present invention, as long as it is without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (12)
1. a calcium silicate slag, it is characterised in that this calcium silicate slag be mainly composed of Si and Ca, possibly together with a small amount of Al, with the gross weight of calcium silicate slag for benchmark, Si, Ca, Al element is respectively with SiO2、CaO、Al2O3Meter, SiO2The content that content is 35-40 weight %, CaO be 35-40 weight %, Al2O3The mol ratio that content is 1-6 weight %, Ca/Si+Al be 0.7-0.9.
2. calcium silicate slag according to claim 1, wherein, the dominant of described calcium silicate slag is tobermorite mutually.
3. a calcium silicate slag base gum filler, it is characterised in that this filler contains the calcium silicate slag that particle diameter is 600-1500 order, described calcium silicate slag be mainly composed of Si and Ca, possibly together with a small amount of Al, with the gross weight of calcium silicate slag for benchmark, Si, Ca, Al element is respectively with SiO2、CaO、Al2O3Meter, SiO2The content that content is 35-40 weight %, CaO be 35-40 weight %, Al2O3The mol ratio that content is 1-6 weight %, Ca/Si+Al be 0.7-0.9.
4. calcium silicate slag base gum filler according to claim 3, wherein, the particle diameter of described calcium silicate slag is 800-1200 order.
5. calcium silicate slag base gum filler according to claim 3, wherein, the dominant of described calcium silicate slag is tobermorite mutually.
6. the preparation method of a calcium silicate slag, it is characterized in that, described method includes: the alkaline process residue of aluminum-extracted of aluminum-containing mineral or waste residue is carried out dealkalize process in alkali liquor, wherein, aluminum-containing mineral or waste residue are preferably flyash, described alkali liquor is at least one solution in sodium carbonate, industrial caustic soda, industry weight alkali, calcium hydroxide and Calx, it is preferred to sodium hydroxide solution.
7. method according to claim 6, wherein, the condition that described dealkalize processes includes: concentration of lye is 20-100g/L, it is preferred to 60-100g/L; Temperature is 100-200 DEG C, it is preferred to 130-180 DEG C; Time is 0.5-2h, it is preferred to 1-1.5h; Liquid-solid mass ratio is 3-6, it is preferred to 4-5; Pressure is 0.1-1.5MPa, it is preferred to 0.27-1.0MPa.
8. the calcium silicate slag that prepared by the method described in claim 6 or 7.
9. the preparation method of a calcium silicate slag base gum filler, it is characterised in that described method includes: calcium silicate slag is crushed to 600-1500 order, wherein, described calcium silicate slag be mainly composed of Si and Ca, possibly together with a small amount of Al, with the gross weight of calcium silicate slag for benchmark, Si, Ca, Al element is respectively with SiO2、CaO、Al2O3Meter, SiO2The content that content is 35-40 weight %, CaO be 35-40 weight %, Al2O3The mol ratio that content is 1-6 weight %, Ca/Si+Al be 0.7-0.9; Preferably, the dominant of described calcium silicate slag is tobermorite mutually.
10. method according to claim 9, wherein, is crushed to 800-1200 order by calcium silicate slag.
11. the method according to claim 9 or 10, wherein, described calcium silicate slag is the calcium silicate slag described in claim 8.
12. the calcium silicate slag base gum filler that in claim 9-11 prepared by method described in any one.
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| CN110527141A (en) * | 2019-09-16 | 2019-12-03 | 桂林方银新材料有限公司 | A kind of modified horn stone powder and its preparation method and application |
| WO2022071281A1 (en) * | 2020-09-30 | 2022-04-07 | 株式会社大阪ソーダ | Rubber composition |
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| CN108622920A (en) * | 2018-05-30 | 2018-10-09 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | A kind of method of aluminous fly-ash extraction aluminium oxide |
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| CN105670059B (en) | 2018-05-08 |
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