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2 484 916

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(51)

IPC

B22C1/00(2006-01-01)

(21) (22)

Application

2011134185/02, 2011-08-15

(24)

Start date

2011-08-15

(22)

Actual filing date

2011-08-15

(45)

Published

2013-06-20

(72)

Inventor

Sviridov Andrej VladimirovichEvstigneev Aleksej Ivanovich

(73)

Holder

Gosudarstvennoe Obrazovatel'Noe Uchrezhdenie Vysshego Professional'Nogo Obrazovanija Gosudarstvennyj Tekhnicheskij Universitet"

GYPSUM MIX FOR PRODUCTION OF PRECISION MOULDING DIES Russian patent published in 2013 - IPC B22C1/00

Abstract RU 2484916 C2

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy. Proposed composition contains the following substances, in wt %: gypsum - 30-35, water - 25-30, heat resistant filler making the rest. Thermal electric power station flue ash makes said heat resistant filler containing 60-75% SiO₂, 12-15% C, 8-10% Al₂O₃, 3-5% CaO, 2-3% Fe₂O₃ and 1% MgO. Its features the following phase composition: 70% of particles 0.315 mm in size, 20% of particles 0.18 mm in size, and 10% of particles smaller than 0.18 mm in size.

EFFECT: higher heat resistance on gypsum casting moulds.

2 cl, 1 tbl

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RU 2 484 916 C2

Authors

Sviridov Andrej Vladimirovich

Evstigneev Aleksej Ivanovich

Dates

2013-06-20—Published

2011-08-15—Filed