US 12,275,059 B2
Foundry articles for metal working applications, methods of making such foundry articles, and particulate refractory compositions for use in such methods
Sandra Böhnke, Oberhausen (DE)
Assigned to IMERTECH SAS, Paris (FR)
Appl. No. 15/733,252
Filed by IMERTECH SAS, Paris (FR)
PCT Filed Dec. 20, 2018, PCT No. PCT/EP2018/086389
§ 371(c)(1), (2) Date Jun. 17, 2020,
PCT Pub. No. WO2019/122237, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 17209150 (EP), filed on Dec. 20, 2017.
Prior Publication US 2020/0384527 A1, Dec. 10, 2020
Int. Cl. B22C 1/18 (2006.01); C04B 14/06 (2006.01); C04B 14/08 (2006.01); C04B 14/10 (2006.01); C04B 14/18 (2006.01); C04B 14/20 (2006.01); C04B 14/30 (2006.01); C04B 18/08 (2006.01); C04B 18/14 (2006.01); C04B 28/26 (2006.01); C04B 40/02 (2006.01); C04B 111/00 (2006.01)
CPC B22C 1/186 (2013.01) [C04B 14/066 (2013.01); C04B 14/08 (2013.01); C04B 14/106 (2013.01); C04B 14/18 (2013.01); C04B 14/202 (2013.01); C04B 14/303 (2013.01); C04B 14/305 (2013.01); C04B 14/306 (2013.01); C04B 18/08 (2013.01); C04B 18/146 (2013.01); C04B 28/26 (2013.01); C04B 40/0263 (2013.01); C04B 2111/00939 (2013.01); C04B 2235/3201 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3208 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of forming a bonded particulate refractory material for use in metal-working, comprising the steps of
(i) providing a fine particulate metal oxide;
(ii) providing an aqueous alkaline composition;
(iii) providing a particulate refractory mould material;
(iv) optionally providing a surfactant and/or a metal hydroxide;
(v) mixing the fine particulate metal oxide, the aqueous alkaline composition and the particulate refractory mould material, and optionally said surfactant and/or metal hydroxide to obtain a mixture thereof; and
(vi) shooting the obtained mixture in a core shooter;
wherein, in the obtained mixture, a total moisture level of the fine particulate metal oxide and the aqueous alkaline composition is in a range of 10 wt.-% to less than 30 wt.-% based on a total weight, in the obtained mixture, of the fine particulate metal oxide and the aqueous alkaline composition; and
wherein substantially all water included in the obtained mixture is derived from the aqueous alkaline composition and/or the surfactant.