阅读说明：本技术 用于获得具有降低铅含量的黄铜坯锭的方法和由此获得的坯锭 (Method for obtaining a brass ingot with reduced lead content and ingot thus obtained ) 是由 加布里埃莱·古纳特 于 2019-08-05 设计创作，主要内容包括：一种用于获得具有降低铅含量的黄铜坯锭的方法,该方法提供对由常规黄铜制成的成品或半成品产品通过切削处理的机械加工,并获得常规黄铜片；对所述常规黄铜片执行破碎处理以获得常规黄铜碎片；对所述常规黄铜碎片执行除铅处理以获得具有降低铅含量的黄铜碎片；在炉中、熔融包括所述具有降低铅含量的黄铜碎片的炉料；通过直接或反向挤出所熔融产物来获得坯锭。(A method for obtaining a brass billet with a reduced lead content, which provides a mechanical working by cutting treatment of a finished or semi-finished product made of conventional brass and obtains a conventional brass sheet; performing crushing treatment on the conventional brass sheet to obtain conventional brass chips; performing a deleading treatment on the conventional brass chips to obtain brass chips having a reduced lead content; melting a charge comprising said brass chips having a reduced lead content in a furnace; billets are obtained by direct or reverse extrusion of the molten product.)

1. A method for obtaining a brass billet having a reduced lead content, comprising the steps of:

-carrying out a mechanical working of a finished or semi-finished product consisting of conventional brass by means of a cutting treatment, obtaining a conventional brass sheet;

-performing a crushing treatment on said conventional brass flakes to obtain conventional brass chips;

-performing a lead removal treatment on said conventional brass chips in order to obtain brass chips having a reduced lead content, wherein said lead removal treatment comprises a lead removal bath, for example in a solution of water and one or more organic acids, preferably said organic acids being selected from the group comprising butyric acid, propionic acid, 2-acrylic acid, acrylic acid;

-melting, in a furnace, the charge comprising the brass chips with reduced lead content;

-obtaining a billet by means of direct or reverse extrusion of the molten product;

wherein if the brass chips having a reduced lead content have an insufficiently low lead content, a further crushing treatment and a further lead removing treatment are performed, and the brass chips to be subjected to the crushing treatment are pressed before the further crushing treatment.

2. A method for obtaining a brass billet having a reduced lead content, comprising the steps of:

-performing a mechanical machining treatment on a finished or semi-finished product consisting of conventional brass, obtaining a conventional brass sheet;

-performing a lead removal treatment on said conventional brass flakes in order to obtain brass flakes having a reduced lead content, wherein said lead removal treatment comprises a lead removal bath, for example in a solution of water and one or more organic acids, preferably said organic acids being selected from the group comprising butyric acid, propionic acid, 2-acrylic acid, acrylic acid;

-performing a crushing treatment on the brass flakes with reduced lead content in order to obtain brass chips with reduced lead content;

-subjecting said chips with reduced lead content to a further lead-removing treatment so as to obtain brass chips with reduced lead content;

-melting, in a furnace, the charge comprising the brass chips with reduced lead content;

-obtaining a billet by means of direct or reverse extrusion of the molten product;

wherein if the brass chips having a reduced lead content have an insufficiently low lead content, a further crushing treatment and a further lead removing treatment are performed, and the brass chips to be subjected to the crushing treatment are pressed before the further crushing treatment.

3. A method according to claim 1 or 2, wherein the deleading bath is agitated, for example by ultrasound.

4. The method of any of the above claims, wherein the disruption treatment comprises grinding.

5. The method of any of the preceding claims, wherein

-carrying out a machining step by cutting treatment in a remote factory;

-transporting the conventional brass flakes to a main plant;

-carrying out said crushing, deleading, melting and extrusion treatments in said main plant.

6. The method of any of the above claims 1-4, wherein

-carrying out a machining step by cutting treatment in a first remote factory;

-transporting the conventional brass flakes to a second remote facility;

-carrying out said crushing and deleading treatments in said second remote plant;

-transporting the lead reduced brass chips to a main plant;

-carrying out said melting and extrusion in said main plant.

7. A brass billet with reduced lead content obtained by the method according to any one of the preceding claims.