US 9,868,149 B2 · Feeder and shapeable composition for production thereof

Abstract

Feeders for use in the foundry industry comprising (a) rice husk ash containing, based on the total amount of the constituents detectable in the rice husk ash by quantitative phase analysis by means of x-ray diffractometry (i) crystalline modifications of silicon dioxide, (ii) monoclinic feldspar and (iii) amorphous silicon dioxide, a total content of at least 70 wt. %, preferably more than 75 wt. % of (i) crystalline modifications of silicon dioxide and (ii) monoclinic feldspar, wherein, based on the total weight of the shapeable composition of the feeder, the amount of this rice husk ash is in the range of from 5 to 50 wt. %, preferably 5 to 25 wt. %, (b) cured binder, (c) optionally fiber material, (d) optionally one or more further fillers, and (e) optionally an oxidizable metal and an oxidizing agent for the oxidizable metal are described.

Claims14

Dependent claims

Feeder for use in the foundry industry, comprising

(a) rice husk ash containing, based on the total amount of the constituents detectable in the rice husk ash by quantitative phase analysis by means of x-ray diffractometry
(i) crystalline modifications of silicon dioxide,
(ii) monoclinic feldspar and
(iii) amorphous silicon dioxide,
a total content of at least 70 wt. % of
(i) crystalline modifications of silicon dioxide and
(ii) monoclinic feldspar,
(b) cured binder
(c) optionally fibre material,
(d) optionally one or more further fillers,
(e) optionally an oxidizable metal and an oxidizing agent for the oxidizable metal.

8 more elements

Shapeable composition for the production of feeders for the foundry industry, comprising

(a) rice husk ash containing, based on the total amount of the constituents detectable in the rice husk ash by quantitative phase analysis by means of x-ray diffractometry
(i) crystalline modifications of silicon dioxide,
(ii) monoclinic feldspar and
(iii) amorphous silicon dioxide, a total content of at least 70 wt. % of
(i) crystalline modifications of silicon dioxide and
(ii) (ii) monoclinic feldspar,
(b) binder,
(c) optionally fibre material,
(d) optionally one or more further fillers,
(e) optionally at least one oxidizable metal and an oxidizing agent for the oxidizable metal.

7 more elements

Process for the preparation of a shapeable composition for the production of feeders for the foundry industry, comprising the steps

provision of a rice husk ash (a) containing, based on the total amount of the constituents detectable in the rice husk ash by quantitative phase analysis by means of x-ray diffractometry (i) crystalline modifications of silicon dioxide, (ii) monoclinic feldspar and (iii) amorphous silicon dioxide, a total content of at least 70 wt. % of (i) crystalline modifications of silicon dioxide and (ii) monoclinic feldspar,
mixing of the rice husk ash (a) provided with
(b) binder,
(c) optionally fibre material and
(d) optionally one or more further fillers
(e) optionally an oxidizable metal and an oxidizing agent for the oxidizable metal, so that, based on the total weight of the shapeable composition, the amount of rice husk ash (a) which contains, based on the total amount of the constituents detectable in the rice husk ash by quantitative phase analysis by means of x-ray diffractometry (i) crystalline modifications of silicon dioxide, (ii) monoclinic feldspar and (iii) amorphous silicon dioxide, a total content of at least 70 wt. % of (i) crystalline modifications of silicon dioxide and (ii) monoclinic feldspar, in the shapeable composition is in the range of from 5 to 50 wt.

3 more elements

Dependencies are inferred from the claim text.

Feeder and shapeable composition for production thereof

Life of this patent

Feeder and shapeable composition for production thereof

Life of this patent

Abstract

Claims14