Continuous casting mold for liquid metals, especially for liquid steel
The invention relates to a continuous casting mould for liquid metals, especially for liquid steel, comprising steel charging plates ( 2 ) which are surrounded by water reservoirs ( 1 ), cassette-type copper plates ( 3 ) arranged against the same, end plates ( 7 ), if needed, for the thickness and/or the width of the cast billet, and coolant channels ( 9 ). The aim of the invention is to take measures to counteract the high temperatures in the meniscus region ( 13 ) using appropriate embodiments of the copper plates ( 3 ) and/or the steel charging plates ( 2 ). To this end, the thickness ( 10 ) of the copper plates ( 3 ) between the coolant ( 11 ) and the hot side ( 3 a ) of the copper plates varies along the width (2×L) and/or in terms of the height ( 12 ).
1. Continuous casting mold for liquid metals, especially liquid steel, comprising: steel charging plates, which are arranged parallel opposite each other to form the casting cross section and are surrounded by water tanks; cassette-type copper plates, which rest against the steel charging plates and bound the casting cavity; possibly end plates, which are inserted at the end faces of the casting cavity for establishing the thickness and/or width of the cast strand and close the casting cavity at the end faces; and coolant channels that connect an inlet with an outlet in the copper plates at their contact surfaces with the steel charging plates; wherein the thickness ( 10 ) of the copper plates ( 3 ) between the coolant ( 11 ) and the hot side ( 3 a ) of the copper plates ( 3 ) varies over the width (2×L) and/or over the height ( 12 ) of the mold, wherein the coolant channels ( 9 ) run in the copper plate ( 3 ) and at least partially in the adjacent steel charging plate ( 2 ); wherein a cross section ( 14 ) of the coolant channel ( 9 ) is smaller in a meniscus region ( 13 ) than elsewhere in the coolant channel ( 9 ).
2. Continuous casting mold in accordance with claim 1 , wherein the thickness ( 10 ) between the coolant channel ( 9 ) and the hot-side surface ( 3 a ) of the copper plate ( 3 ) is smaller in the meniscus region ( 13 ) than it is above or below this region.
3. Continuous casting mold in accordance with claim 2 , wherein the smaller thickness ( 10 ) between the coolant channel ( 9 ) and the hot-side surface ( 3 a ) of the copper plate ( 3 ) is limited to the height section (H 2 ), and the smaller thickness increases continuously to a distance (A u ) in lower sections.
4. Continuous casting mold in accordance with claim 1 , wherein the hot-side surface ( 3 a ) of the copper plate ( 3 ) has a section of a distance (D 1 ; D 3 ) that is constant in the same width sections (L 1 ; L 3 ).
5. Continuous casting mold in accordance with claim 1 , wherein in width section (L 2 ), the distance to the hot-side surface ( 3 a ) is smaller in the central region than in the peripheral region.
6. Continuous casting mold in accordance with claim 1 , wherein grooves ( 15 ) in the copper plate ( 3 ) which communicate with the coolant channel ( 9 ) are formed with groove depths ( 16 ) greater than 10 mm and less than 20 mm.
7. Continuous casting mold in accordance with claim 1 , wherein a funnel mold ( 17 ) can be used and the width section (L 3 ) forming a greatest distance (D 3 ) of the coolant channel ( 9 ) from the hot-side surface ( 3 a ) of the copper plate ( 3 ) has a length of 50-80% of a length of the width region (L) in the funnel ( 17 a ).
8. Continuous casting mold in accordance with claim 7 , wherein an external width region (L 1 ) of the copper plate ( 3 ) is 50-80% of the wide-side half-length (L) minus the funnel half-width (L 3 ).