SU1055081A1 - Mineral binder - Google Patents

Abstract

MINERAL BINDING, comprising 83-87 wt.% Of silica-containing component and 13-17 wt.% Of water, characterized in that, in order to reduce the duration of the technological process and increase the volume condition of products based on it in the temperature range 1350-1450 C, it is as a silica-containing component contains a battle or scrap of silica products. €

Description

listened to

The invention relates to refractory materials, namely, to compounds in a silica composition, and can be used in the industry of building materials.

Mineral compounds are known for living on the basis of quartz sand and water. The closest technical solution to this is the most important mineral containing quartz sand of 82-89 wt.% And water of 11-18 wt.%. The disadvantage of this recipient is the long duration of the technological process associated with the duration of stabilization of the resulting suspension, since the silica sand-based suspension increases its binding properties only after long-term stabilization. In addition, the disadvantage of this user is the insufficient volume of products based on it in the temperature range of 1350-1450 ° C. The aim of the invention is to reduce the duration of the technological process and increase the volume content of products based on it in the temperature range of 1350-1450s. This goal is achieved by the fact that the mineral to the living, including 83-87 wt.% Silica-containing component and 13-17 wt.% Water, contains silica as a silica-containing component or scrap of silica products. The use of bo as a silica-based raw material or scrap of plastic products makes it possible to shorten the time for obtaining a binder, since there is no need for a long stabilization operation. This is explained as follows. The mineral base of bo or scrap of dinas products is silica in the form of tridymite and cristobalite, which, in the process of wet grinding in an alkaline medium, completely hydrate to form on their surface a gel of silicic acid, which causes the suspension properties. As an impurity, a silica scrim or scrap contains calcium silicates, which, when milled, are a transition of calcium hydro silicates. In case of further stabilization, calcium hydrosilicates bind a large amount of water, as a result of which they increase their viscosity.

suspension, which further impairs the properties of castings.

Due to the fact that silica or scrap of silica products undergo polymorphic transformations in the process of burning or service, the presence of untransformed silica in suspension is minimized. Due to this, the predicted mineral substance provides the volume of castings and products based on it in the temperature range of 1350 - 1450 ° С. The limits of bo content or scrap suspension are due to the fact that when bo or scrap content is more than 87 wt.% (Upper limit), the viscosity of the suspension in the first grinding stage increases sharply, which makes it impossible to continue grinding. those. does not allow to obtain mineral. on the go. By reducing the content of dinas bo or scrap in the suspension below 83 wt.%, The suspension properties are not sufficient in the suspension. The invention is illustrated by the following examples. Mineral to a silica-based slant is produced by wet grinding bo or scrap of silica products in a steam mill. The grinding is performed with a 3-X one-time loading of the raw material in an alkaline medium in the following mode. The initial reject loading of dinas products is 50% of the total amount of material, the liquid: solid ratio is 1: 4.5. The grinding is carried out for 4 hours until i 100% material passes through a 0.063 mm sieve. Then make loading another 25% bo. The second stage of grinding is carried out for 4 hours until the rest of the material on the sieve is 0.063 mm 7-8%. After the end of the second grinding stage, the density of the slurry and its pH are determined. Then, the final reloading of the material (25% bo) is carried out and the final grinding is carried out for 4 hours until the residue on the sieve of 0.063 mm is not more than 10%. The compositions of the obtained mineral in the grip and its properties are given in Table 1. I The part of the suspension corresponding to composition No. 2 is subjected to stabilization by mechanical mixing in a ball mill in the absence of grinding bodies. Stabilization is carried out within 24 hours, and periodically samples of the suspension are taken.

To obtain comparative results, a well-known quartz sand based quiver is prepared. Grinding is carried out in a similar mode for 24 hours, after grinding, the suspension is stabilized for 24 hours. The composition and properties of the resulting binder are. The prototype is also listed in Table I.

From the prepared offer to the live, samples to the live after stabilization, as well as to the live pending prototype

GSE-OVYAT castings by pouring into plaster molds.

After drying, the castings are subjected to tests: the compressive strength and open porosity are determined. Some of the castings are fired at a temperature and then volume changes are determined. The test results are shown in Table 2.

Mineral composition

Ingredient composition

wt.%

Components

From Table 1 it is clear that the process of obtaining the proposed product is less long, which simplifies the technological process, and the stabilization, as the data of Table 2 confirm, does not improve, but deteriorates the properties of the castings (reduces the strength of the castings and increases their porosity:) .

From the test results it can be seen (Table 2) that the proposed mineral-to-binder composition has a higher volume space than the prototype composition.

The use of ballast products helps to create waste-free production, reduces energy costs and frees grinding equipment. All these factors favorably affect the reduction of the cost of mineral binder and products based on it, while improving the quality of the latter.

Table

Battle of dinas products83

Water17

Fight the dinas

products85

Water15

Dinas Scrap

products87

Water13

Quartz sand89

Water11

1.89 3.4-10.2

12

12 1.96 9.4-10.2

12 2.00 9,

48-J60 2.30 - .2-9-9.8 2.24

Note: Indices 1,2,4,6,24 indicate the stabilization time in hours.

Claims (1)

MINERAL BINDER, comprising 83-87 wt.% Silica-containing component and 13-17 wt.% Water, characterized in that, in order to reduce the duration of the process and increase the volume stability of products based on it In the temperature range 1350-1450 ° C , it as a silica-containing component contains a fight or scrap of dinas products. I