SU510455A1

SU510455A1 - The mixture for the production of expanded clay

Info

Publication number: SU510455A1
Application number: SU1976469A
Authority: SU
Inventors: Борис Васильевич Гришин
Priority date: 1973-12-10
Filing date: 1973-12-10
Publication date: 1976-04-15

Description

(54) ШИХТА ДЛЯ ПРОИЗВОДСТВА КЕРАМЗИТА(54) CHARGE FOR PRODUCTION OF CERAMSITE

II

Изобретение относитс к области производства строительных материалов, в частности к производству керамзита.The invention relates to the production of building materials, in particular to the production of expanded clay.

Известны шихты, включающие глинистое сырье и добавки, в том числе соли щелочных металлов.Known blends, including clay raw materials and additives, including alkali metal salts.

Однако шихты с известными добавками не позвол ют резко увеличить коэффициент вспучивани глинистого сырь .However, blends with known additives do not allow a sharp increase in the swelling ratio of the clay raw material.

Цель изобретени - снижение температуры пиропластического разм гчени и увеличение коэффициента вспучивани .The purpose of the invention is to reduce the temperature of pyroplastic softening and increase the coefficient of expansion.

Достигаетс это тем, что шихта содержит в качестве соли сульфаты, например Na2SO410 Н2О, при следующем количественном соотношении компонентов, вес.%:This is achieved by the fact that the mixture contains sulphates as salts, for example, Na2SO410 H2O, with the following proportion of components, wt%:

Глинистое сырье95-98Clay raw materials95-98

Сульфат5-2Sulfate5-2

Введенные в вышеуказанных количествах в глинистое сырье растворимые в воде сульфаты щелочных и щелочноземельных металлов при быстром обжиге сохран ютс равномерно распределенными по всей массе гранул , вл ютс источниками газообразных продуктов разложени , вснучивающих глинистое сырье. Это способствует увеличению коэффициента вспучивани глинистого сырь , созданию равномерной мелко чеистой структуры внутри керамзитовой гранулы и получению керамзита с высокими физико-механическими свойствами.The water-soluble sulphates of alkaline and alkaline-earth metals, introduced in the above quantities into the clay raw materials, are kept evenly distributed throughout the whole mass of granules during fast calcination, and are sources of gaseous decomposition products, which accumulate the clay raw materials. This contributes to an increase in the coefficient of swelling of the clay raw material, the creation of a uniform finely cellular structure within the expanded clay granules and the production of expanded clay with high physicomechanical properties.

Изготовление керамзита из указанной шихты осуществл етс следующим образом.The manufacture of expanded clay from this mixture is carried out as follows.

Claims

Example 1. For the manufacture of haydite, blasters are prepared from practically untreated clay raw materials and salt additives. Clay raw materials are taken in the amount of 98%, the addition of Na2S04-10H2O - in the amount of 2.0%. Raw ceramsite granules are prepared by plastic method. After drying, the semi-finished product is subjected to firing at 1100-180 ° C. i3 Example

2. Expanded clay is made in the manner described in Example 1, but the clay raw material is berzt in the amount of 97.0%, and the additive Na2SO4-10H2O in the amount of 3.0%. Example

3. Expanded clay is made aiao-5 described in Example 1, but the clay raw material is taken in an amount of 95%, and the addition of Na2SO4-10H2O is taken in an amount of 5%. The physicomechanical properties of expanded clay of compositions of bulk mass of 450 kg / m are given in the table. From the mixture of the indicated composition, expanded clay can be made by dry and wet methods. 4 A mixture formula for production of expanded clay, including clay raw materials and alkali or alkaline earth metal salt, characterized in that, in order to reduce the temperature of niroylastic softening and increase the swelling ratio, it contains sulphates as salt, for example, Na2SO4-10H2O, the following quantitative ratio of components, wt.%: Clay raw materials 95-98 Sulfate 5-2