SU1708795A1 - Method of preparation binder for production heat insulation material - Google Patents

Abstract

The invention relates to the field of production of building materials and can be used in the preparation of a binder for the manufacture of heat insulating cardboard based on basalt fibers. In order to increase the elasticity of the material in the binder preparation method for the manufacture of heat insulating material, two solutions are prepared separately, the first of which is obtained by introducing, with stirring, into the silica sol, a circulating binder at a volume ratio of 0.07-0; 55: 1 and a weight ratio in the solution of ibm amm they and crumne dioxide 0.075- 0; 110: 1, and to obtain a second in water, the ammonium salt is dissolved in Kot limestones: ensuring the content of ammonium ion in the solution is 0.10-0.66 wt. ^ ^ And then both 'solutions are mixed immediately before using the binder. with a cost ratio of 2.18-3 > & 7: 1 and a mass ratio of e • binding ion of ammonium ion and silicon dioxide 0.15-0.18: 1. The density of the material obtained is 90-116 kg / m ^, the tensile strength is 0.19-0.22 MPa, the flexibility is 50 mm. Table 3 / 1k /) Sj-00 XJ The invention relates to the production of building materials and can be used in the preparation of a binder for the manufacture of insulating cardboard on the basis of basalt fibers. The purpose of the invention is to increase the elasticity of the material. The method of preparing a binder for the manufacture of thermal insulating material are as follows. Binder, pressed from the moistened canvas ^ i.e. the circulating binder is inserted into the collecting tank, from where it is continuously pumped into the first mixing tank, and the previously poured concentrated silica sol is diluted with stirring.

Description

For the preparation of the first solution, silicic acid sol according to TU Y8-1919-02-86 with a mass fraction of silicon dioxide 3.5-, 5 wt.% And sodium oxide O, 03 wt., PH 8.2-10.0 and density 1b is used. -1.01-1,02 g / cm „The circulating binder is fed to the mixer with a flow rate of 26-33 5 l / h. Its supply is stopped when the calculated volume of the first solution is reached, which is determined by the ratio of the volumes of the ash and the circulating binder O, 07-0.55: 1, and technical requirements. The content of ingredients in the finished first solution, wt .: Sol of silicic acid in terms of silica (SiO) 0.8-2.5 Ammonium salt to ion and equal to 0.08-0.24 moni (NH) mass ratio NH: Sidg 0.075-0.11: The initial volume of the first solution (in the absence of a circulating binder) is prepared from the original ingredients with the above ratio. After the supply of the circulating binder to the first mix tank is discontinued, it is transferred to another container, similar to the first, into which the measured volume of concentrated silica sol is already filled, and the process of preparing the first solution is repeated. . /.-.- .., Simultaneously with the preparation of the first solution in the first tank-mixer in the second tank-mixer, a second solution is prepared - an aqueous solution of ammonium salt. For this purpose, WATER is poured into the tank at the rate of volume, the ratio of the first and second solutions is 2.183, 47: 1, and ammonium chloride, sulfate or nitrate or other ammonium salt is dissolved in it in an amount that provides 0.10-0 in the solution , 66 wt.% Ammonium ion. After the previously prepared first and second solutions have been consumed, the first and second mixers are connected to the mixer-distributor. From the first tank serves the first solution with a flow rate of 34.3-40.3 l. From the second tank serves the second solution with a flow rate of 11.7-17.2 l / h, which ensures their ratio corresponding to the volume ratio of the prepared solutions 2,15-3 , In the mixer-distributor, the solutions, after mixing, are formed into a flat stream, I which is a ready binder in composition, and is introduced into a mineral wool canvas with a flow rate of 50-57 l / h. Ingredients content in the binder, wt.%: Sol of silicic acid (in terms of silicon dioxide) 0.56-1.94 Ammonium salt (in terms of ammonium ion) 0.08-0.35 mass ratio of NH rSiO. 0.15-0.18. J-t At the same time, with the use of m solutions from the first and second mixers in another pair of identical containers, new volumes of solutions are prepared and hereafter the binder preparation steps are repeated cyclically in their technological sequence. Ultra-thin or super-thin basalt fiber canvas or a mixture of these fibers with a diameter of 0.6-3 microns is fed continuously to the conveyor, moving at a speed of 0.6 m / min. Previously prepared ne (evyuy and second solutions are fed into a mixer-distributor, where they are mixed, distributed over the entire width of the conveyor in the form of a flat stream and injected into the mineral wool canvas by irrigation. After impregnation, the binder is passed under pressure rolls and then over vacuum box, sucking off excess binder. In a wrung canvas, the vertical liquid ratio is t: (0.9-1.0), for which, using Ultra- or superthin fibers, it is sufficient to maintain this ratio when watering at 1: 2 -2.5. vlazhnenny canvas enters the conveyor has dried, wherein is subjected to heat treatment at 180 250 ° C. Of Dried continuous flow vyhsedit heat insulating board, which output razreazyut sheets on the required dimensions. Est prigotovloni) h binder are given in Table 1. The examples in Table 1 correspond to the mixtures for the manufacture of heat-insulated Zion cardboard, presented in Table 2, with different ingredients.

  one

The quality indicators of the finished heat insulating cardboard are shown in Table 3.

Ф орм у л а and 3 о б 8 8 т ё н и

The preparation of a binder for the manufacture of a heat insulating material by mixing a silica sol, ammonium acid, ammonium salt and

water, that is, in order to increase the elasticity; material: la, first two solutions are prepared separately, the first one is obtained by mixing with mixing into a sol

08795b

silicic acid recycle binder with a volume ratio of 0.07-0.5. S: 1 and a mass ratio in the solution of ammonium ion and silicon dioxide 0.075-0.11: 1; and to obtain a second one in water, the ammonium salt is dissolved in an amount about 10% of the ammonium ion in a solution of 0.10–0.66 May, then an oQa solution is mixed in a ratio of 2, 18- immediately before use. , which provides the ratio of ammonium ion and silicon dioxide 15 of 0.15-0.18: 1.

т and е, 1 н ц f: - -,.

Table 2

Claims (1)

Claim A method of preparing a binder for the manufacture of a heat-insulating material by mixing a sol of silicic acid, ammonium salt and water, which is so that in order to increase elasticity? First, two solutions are prepared separately, the first one is obtained by introducing a binder of silicic acid with a rotary binder with stirring into sol I '.. B' at a volume ratio of 0.07-0.5.5: 1 and a mass ratio in the solution of ammonium ion and dioxide silicon 0.075 “0.11: 1 ,: and to obtain the second one, the ammonium salt is dissolved in water in an amount that ensures that the content of ammonium ion in the solution is 0.10-0.66 wt.%, then both solutions are mixed immediately before using the binder in a ratio of 2.18-3.47: 1, providing a ratio of ammonium ion and silica 0.15-0.18: 1. T a € l and 1 ** ' Rust Thief . Pzh'aaatel Example 1 2 .......... *?: ') 5- ' It has- ... ....... ........ ηιΛ ' Oiseisel silicic acid "l 115 18 fifty 23 before Cash register field SI0, *.5 ' steam aole.ias. * 3.5 1,0 3.5 *.5 • - · vA Negotiable volume 1,268 208 Sayaeuptsegr, I 208 256 256 Reverse flow rate, l / h The ratio of volumes leading and revolving ²⁶ 0.55: 1 32 ' 333 0.19: 1 .. 32 '· - 26 - aupstego 0,07: 1> 0.09: 1 0, * 3: 1 -;. . Volume of solution, l 323 27 * 318 279 298 The bulk share is 310, and the solution, us. * 2.5 0.82 1,53 0.8 2.18 Per- Cash share amy • solution; Month 1 0.19 0.09 0.15 0.08 0.21 Corresponding to Wi ^ xSlO,, 0.075: 1 0.11: 1 0.1: 1 0. U1 0.09.1 Solution consumption, l / h * 0.3 3 *, 3 39.8 3 *, 8 37,2 Water volume, l Nassoyaya share of MN. a solution, MayL 93 .126 138 121 118 - • then · 0.66 0.11 0.21 0.10 0.611 . “ Roy Solution consumption, l / h 11.7 15.7 7.2 15,2 11.8 - ''. Sowing volume - *16 * 00 * 56 * 00 *16 100-156 The cash fraction is 310, and the share is Mayaupd., May. 1.9 * 0.56 1,07 0.56 1.91 0.56-t, 9 * 0.29 0.10 Ο, ι8 0,081 0.35 0.02-0.10 Cm * y- The ratio of MhJ: SiO, 0.15: 1 0.18: 1 0.17: 1 0.15: 1 0.18: 1 0.02-0.05.-1 yet The ratio of rvhsds of the first and second solutions 3, * 7: 1 2.18: 1 2.31: 1 2.31: 1 2.53: 1 Consumption eeyaurtsego.l / h 52 fifty .I fifty 52 50-57 ' Tweedy ratio in squeezed canvas 1: 1 1: 0.9 1: 0.9 1: 0.9 1: 1 1: 0.9-1.0 T nrdsyashd ratio when watering the canvas 1: 2 ' 1: 2.5 1: 2,3 1: 2.5 1: 2 1: 2.0-2.5 ι Table 2 Components Content, May L, as exemplified 1 2 3 ; 2..J Famous Basalt fiber 97.81 99.41 98.83 99.42 97.76 99-99.46 Silicic acid sol • (in terms of SiO ₂ ) 1.9 0.5 1,0 0.5 1.9 0.5-1.9 Ammonium salt (in NH account |) 0.29 0.09 0.17 0.08 0.34 ; 0.01-0.1 NH *: Si0 ₄ ratio 0.15: 1 0.18: 1 0.17: 1 0.16: 1 0.18: 1 0.03: 1 Table 3 Example Technical indicators 1 ; '2 3 4 5 Famous Density, kg / m ³ 116 90 112 90 116 89-117 Thermal conductivity, W / (m> K) 0,031 0,028 0,029 0,028 0,031 0.029-0.033 Tensile Strength, MPa 0.20 0.22 0.20 0.21 ’ oh 19 0.1-0.2 Flexibility mm fifty fifty fifty fifty fifty 217