FIELD: oil and gas industry.
SUBSTANCE: in the method for obtaining an expansion agent, which involves roasting of raw mixture containing chalk and additive that contains sodium adipate, further grinding of roasted product, as the additive there used is alkali adipic plasticising agent - AAPA-1 or alkaline drain of produced caprolactam - LDPC; raw mixture is prepared, which has humidity of 5-7%, by through mixing; then, stable forms with dense structure are obtained by pressing the prepared mixture, roasted at the temperature of 850-950°C; at that, temperature rise rate during the roasting process is 5.0-20.0 deg/min; roasted product is cooled down uniformly.
EFFECT: increasing expansion degree.
1 ex, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
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|
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