Method for extracting niobium alloy from niobium-titanium-rich slag and application of solid carbon reducing agent

A technology of reducing agent and solid carbon, applied in the field of extracting niobium alloy, can solve the problem of high cost

Active Publication Date: 2021-09-07
BAOTOU RES INST OF RARE EARTHS +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The melting method uses pure metal as raw material, and its cost is high

Method used

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  • Method for extracting niobium alloy from niobium-titanium-rich slag and application of solid carbon reducing agent
  • Method for extracting niobium alloy from niobium-titanium-rich slag and application of solid carbon reducing agent

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Embodiment 1～3 and comparative example 1

[0067] The main components of niobium-titanium-rich slag raw materials are shown in Table 1. The ash content in the semi-coke is 10.1wt%, the volatile matter content is 13.32wt%, and the fixed carbon content is 76.32wt%. The particle size of semi-coke is recorded as d, 0.1mm≤d≤5mm. The niobium-titanium-rich slag includes niobium-titanium-rich slag raw materials and lime (CaO content 87.32wt%), and its basicity is shown in Table 2.

[0068] Mix niobium-titanium-rich slag, nickel oxide powder and semi-coke evenly, put them into an induction furnace lined with a graphite crucible and heat up to the reaction temperature (T 1 ), and then at the reaction temperature (T 1 ) under reaction t 1 time, niobium-nickel alloy and titanium-containing slag are obtained. The main components of niobium-nickel alloy are shown in Table 3.

[0069] Put niobium-nickel alloy and carbon monoxide at pressure P and temperature T 2 Under the condition of reaction t 2 Time, nickel carbonyl and nio...

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Abstract

The invention discloses a method for extracting a niobium alloy from niobium-titanium-rich slag and application of a solid carbon reducing agent. The method comprises the following steps that (1) raw materials containing, by weight, 1 part of the niobium-titanium-rich slag, 5-20 parts of a nickel-containing substance and the solid carbon reducing agent react at the temperature of 1200-1530 DEG C to obtain a niobium-nickel alloy, wherein the alkalinity of the niobium-titanium-rich slag is 0.5-1.5, the nickel-containing substance is selected from one or more of a nickel elementary substance, nickel oxide or nickel inorganic salt, the use amount of the niobium-titanium-rich slag is metered by the niobium element, and the use amount of the nickel-containing substance is metered by the nickel element; and (2) the niobium-nickel alloy and carbon monoxide react at the temperature of 145-250 DEG C to obtain carbonyl nickel and the niobium alloy. The content of niobium in the niobium alloy prepared by the method is high.

Description

technical field [0001] The invention relates to a method for extracting niobium alloy from niobium-titanium rich slag and the application of a solid carbon reducing agent. Background technique [0002] Niobium alloy is a high temperature resistant material with good high temperature strength and good low temperature plasticity. In addition, niobium also has excellent properties such as small thermal neutron absorption cross section, liquid metal corrosion resistance and good superconductivity, making niobium alloys considered to be one of the most promising high-temperature materials. Niobium alloys can be used as additives for steelmaking or casting, alloying agents in welding electrodes, and magnet materials. At present, ferroniobium alloy is the most widely used, which is usually prepared by metal thermal reduction method or fusion method. The reducing agents commonly used in the metallothermal reduction method include aluminum, ferrosilicon and aluminum-magnesium alloy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B5/10C22B34/24C22B34/12
CPCC22B7/001C22B5/10C22B34/24C22B34/1218Y02P10/20
Inventor 刘玉宝赵二雄张先恒杨鹏飞李园吕卫东高日增苗旭晨于兵侯复生张全军黄海涛闫奇操张洋康佳董岳阳刘冉郝怡人
Owner BAOTOU RES INST OF RARE EARTHS
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