Method for producing low-lead tin-based babbitt metal by using tin refining slag

Abstract

The invention relates to a method for producing low-lead tin-based babbitt metal by using tin refining slag. The method comprises the following steps: (1) adding crude tin refining copper-sulfur-removed slag, crude tin refining arsenic-antimony-aluminum-removed slag, tin calcine, limestone and river sand into a reduction smelting furnace according to a certain material ratio; (2) the produced crude tin with high copper and antimony content is subjected to centrifugal iron removal, and an iron removal agent is used for deep iron removal; (3) high-copper-and-antimony-content crude tin with the iron content smaller than or equal to 0.01% is fed into a high-temperature vacuum distillation separation furnace, arsenic, lead and bismuth are removed, and a high-copper-antimony-content crude tin alloy is produced; and (4) elements such as copper and antimony are added into the high-copper-antimony crude tin alloy according to the tin-based babbitt alloy element requirements, and a low-lead tin-based babbitt alloy product is produced. The method disclosed by the invention is simple in process operation condition, high in mechanical automation degree, short in flow, environment-friendly in production process, small in smelting waste residue generation amount, free of generation of highly toxic substances, namely arsenic and aluminum residues, and high in tin smelting recovery rate.

Description

technical field [0001] The invention relates to the fields of comprehensive recovery of valuable metals from crude tin refining slag and new materials, in particular to a method for producing low-lead tin-based babbitt alloy by utilizing tin refining slag. Background technique [0002] Tin-based babbitt refers to an alloy composed of tin-based elements such as antimony and copper, also known as tin-based bearing alloy or tin-based white alloy, and is a widely used bearing material in industry. Common tin-based babbitt alloys are Sn-12Sb-4Cu-10Pb, Sn-11Sb-6Cu, Sn-8Sb-4Cu, Sn-4Sb-4Cu, etc. Among them, low-lead tin-based babbitt alloys are the most widely used and used. At present, the production of tin-based babbitt is mainly for the preparation of tin, antimony, copper pure metal ingots and the conventional smelting process of tin smelting slag. There is no market competitiveness, and the market bidding power is low; the conventional smelting process of tin smelting smelting...

AI Technical Summary

Problems solved by technology

At present, the production of tin-based babbitt alloy is mainly the preparation of tin, antimony and copper pure metal ingots and the recycling of tin smelting slag by conventional smelting process. There is no market competitiveness, and the market bidding and bargaining power is low; the resource utilization of the conventional smelting process of tin smelting slag generally has a certain process configuration in large-scale tin smelting enterprises, and the main method depends on the reduction and smelting of tin smelting slag and tin concentrate in the reduction furnace to produce high antimony Copper crude tin, and then remove iron, arsenic, lead, and bismuth according to the conventional tin refining process, such as adding aluminum to remove arsenic, because the chemical characteristics of arsenic and antimony are similar, it will cause part of the element antimony to be removed while removing arsenic, and also produce The highly toxic substance aluminum, arsenic and antimony slag is produced (the poisonous gas of hydrogen arsenide is produced when in contact with water or humidity); for example, the crystallization machine removes lead and bismuth, because of the high content of multi-element metals such as copper and antimony in the crude tin, the crystallization machine has low ability to remove lead and bismuth, and the energy High energy consumption, difficult operation of the crystallizer, high failure rate, etc. At the same time, due to the long process flow, a large amount of tin refining slag is produced, resulting in a decrease in the direct yield of tin smelting and a loss of valuable metal slag