SU667525A1 - Raw mix for ceramsite production - Google Patents

Description

The invention relates to compositions of masses for the manufacture of expanded clay and can be used in the construction and pulp and paper saturation. The known raw material mixture for the production of expanded clay, including, wt.% Clay - 96-97 and organo-mineral additive - sewage sludge - 3-4. Expanded clay obtained from this mixture has a volume weight of 0.230 kg / cm, a temperature range of expansion of 100 degrees, a coefficient of expansion of 8.6 11. The closest in technical value and Achieved effect to the invention is the raw mixture for the production of expanded clay, including ) chyaschaya, wt.% clay raw materials 65-80, hydrolysis lignin - 18-34.5 and sulfuric acid - 0.5-2.0. A shortfall of this composition is a relatively high volume weight of 420–450 kg / cm with a strength and compression of 30–32 kg / cm. 12. The purpose of the invention is to reduce the bulk mass: expanded clay and increase the pro- duction. For this raw mix for production. of claydite, including clay raw material ri lignin-containing additive, as a lignin-containing additive sulphate sludge-lignin in the following ratio of components, wt.%: Clay SF95.0-9975 Sulphate slime-lignin 0.5-5.0 Sulphate psham-lignin is formed in the process of biochemical wastewater treatment and is characterized by the presence of the following organic and mineral compounds, wt.%: JbtrHHHH sulphate60-65 Active or 10.6-11.0 Fine fiber 1.5-2.0 Aluminum hydroxide 20.5-21 Silicon dioxide 1 , 5-2.0 oxides of iron, magnesium, titanium and calcium 0.4–0.5 Sulfates 0.5–3.5 Organic components of sulphate schlidm-lignin - activated sludge and fine fiber have a higher dispersion (0.1–0.01 mm), which is significantly lower than hydrolyzed lignin. improves the rheological properties of clay, ensuring uniform distribution of the additive in the gliomass.

 ,. „М1 нтё |% л |, Шё-; bypMy | My additives, namely, aluminum hydroxide, at high temperatures, as a result of dehydration, transforms into a refractory and high-strength mineral corundum (Alg sous, and also partially baked with silicon dioxide into refractory and high-strength material mullite, which is refractory and high-strength materials, expand the temperature range of mass swelling and increase the strength of expanded clay.

Raw mix for the production of expanded clay; This composition can be obtained both by plastic and slip method. By plastic method, crushed clay is fed to two-shaft agitators, where clay

the dough is homogenized, moistened, and sludge lignin is fed into it. Then clay

Theoto Pass the h: Erez processing and forming all of the All. Molded raw granules are conveyed for drying and then fired in a rotary kiln. The firing temperature is 111Q-123QC.

According to the slip method, the crushed clay is fed into a concrete mixer, and water and sludge lignin are also supplied there. The resulting mixture is thoroughly mixed and then pumped into the pools, from where it is fed into the oven through a metering device. The firing temperature is 1170-1230 °.

When roasting, the organic part of the sulphate-lignin sludge, which is the source of the gaseous products, provides a heaving mass.

Examples of the composition of the raw mix and quality indicators are presented in the table. .