Method for obtaining chromated nickel base material by treatment of chrome slag with smelting reduction process

Abstract

The invention discloses a method for obtaining chromated nickel base material by treatment of chrome slag with smelting reduction process, which comprises the steps of (1) preparing raw materials based on the chromated nickel content in the chromated nickel base material, wherein the ingredients of the raw material are chrome slag, chromite ore, nickel powder and hematite; (2) uniformly mixing and baking the raw materials in step (1) to obtain a dried composite material; (3) crushing the dried composite material in a crusher; (4) adding pulverized coal and binder in the crushed composite material for blending and rolling to obtain a mixed material; (5) placing the mixed material in a ball press to form green balls; (6) baking the green balls and obtaining the pellet ore with melallizationrate; and (7) putting the pellet ore with melallization rate in a melting and separating furnace, the chrome, nickel and iron elements compose the chromated nickel base material and other elements become slag. The invention takes chromated nickel as the raw material of the chromated nickel base material product, provides a harmless treatment method for the chrome slag, saves large quantities of invested cost in chrome slag treatment for chromium salt enterprises and obtains beneficial products simultaneously. The method of the invention is low in energy consumption and can obtain comparatively high economic benefit.

Description

technical field [0001] The invention relates to chromium slag treatment, which is a method for treating chromium slag by melting reduction method to obtain chromium-nickel base material. Background technique [0002] Chromium slag is a heavy metal waste produced in the production of chromium salts, which can cause great damage to the human body, animals and plants. Therefore, the treatment of chromium slag has always been a high input cost in the production of chromium salts. [0003] Although the chromium slag treatment methods have been continuously improved in recent years, various methods have so far failed to achieve harmless treatment. At the same time, these methods have the disadvantages of large investment in equipment and capital, and are prone to cause secondary pollution. Therefore, the harmless treatment of chromium slag has been one of the long-term key research topics for those skilled in the art. [0004] Those skilled in the art have tried to use chromium ...

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Problems solved by technology

[0004] Those skilled in the art have tried to use chromium slag in the ironmaking process to obtain chromium-containing iron, so as to achieve harmlessness. However, because chromium is a harmful element in the sintering process, it has a negative impact on the quality and output of sintered ore. In addition, the stability of the blast furnace is poor, and the production cost of pig iron is greatly increased. At the same time, chromium-containing pig iron is limited to specific steel types. Therefore, this method cannot be popularized and used, let alone solve the problem of a large amount of chromium slag discharge. governance