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Method for enriching nickel and material for refining nickel

An enrichment and material technology, applied in the field of nickel enrichment, can solve the problems of high consumption of sulfuric acid, high requirements and high investment, and achieve the effects of low roasting temperature, reduced construction investment and low investment.

Pending Publication Date: 2022-06-28
北京千冶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages are high investment, high consumption of sulfuric acid, and relatively strict requirements on equipment and materials; since impurities such as magnesium have a greater impact on acid consumption, and the economic indicators of the process are mainly affected by the consumption of sulfuric acid, the requirements for magnesium in raw ore are relatively high. High, generally suitable for processing laterite nickel ore containing less than 5% magnesium

Method used

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  • Method for enriching nickel and material for refining nickel
  • Method for enriching nickel and material for refining nickel
  • Method for enriching nickel and material for refining nickel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0081] A method for enriching nickel, comprising the steps of:

[0082] 1) The raw material is laterite nickel ore.

[0083] Additives were provided in the amounts shown in Table 1 in the column "Roasting Conditions" based on the weight of the laterite nickel ore. Among them, the additive ① in the embodiment 1-2 is calcium chloride; the additive ① in the embodiment 3-4 is copper chloride; the additive ① in the embodiment 5 is 45% calcium chloride and 55% sodium chloride; The additive ① in Example 6 is 50% calcium chloride and 50% sodium chloride; the additive ① in Example 7 is 40% calcium chloride and 60% sodium chloride; the additive ① in Example 8 is 55% calcium chloride and 45% sodium chloride.

[0084] Additive ② is a reducing agent mixed with laterite nickel ore for pelletizing. Additive ③ is a reducing agent that does not form pellets with laterite nickel ore, and is roasted in the roasting area. The reducing agent in Example 1-2 is coke; the reducing agent in Exampl...

Embodiment 8

[0089] In Example 8, the pellets were preheated at rest. Then calcined according to the calcination conditions described in Table 1. During roasting, the pellets are transported at a constant speed in the rotary kiln. Along the movement route of the pellets, the calcination temperature is gradually increased.

[0090] 3) The calcined calcine is directly water quenched and cooled to prevent the calcine from being oxidized. After water quenching, the ore is ground, and the fineness after grinding is 0.03-0.05mm, accounting for 85%.

[0091] 4) After grinding, the material enters the flotation system, and flotation obtains concentrate and tailings. The test data of raw materials and concentrate are shown in Table 2.

[0092] Flotation can use the existing flotation process, in the flotation system for roughing, sweeping and beneficiation operations, each flotation operation is separated into two products, namely froth and bottom flow. Wherein, the raw materials are firstly ad...

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Abstract

The invention relates to a method for enriching nickel and a material for refining nickel. The method for enriching nickel is characterized by comprising the following steps: roasting a raw material in a reducing atmosphere to enrich nickel in the raw material; the roasting temperature is 600 DEG C to 850 DEG C. The method for enriching nickel has the advantages that (1) reduction roasting is carried out at the medium and low temperature of 600-850 DEG C, the phenomenon of kiln sintering caused by sintering is avoided, and the production process is easy to control; roasting temperature is low, manufacturing cost of process equipment is low, manufacturing and maintenance are easy, and energy consumption is low; 2) the method adopts selective reduction roasting, and can treat various raw ores, concentrates, tailings, roasting treatment products or tailings with various complicated occurrence states; and 3) the method can adopt a rotary kiln for roasting, and is suitable for large-scale industrial production.

Description

technical field [0001] The present invention relates to a method for enriching nickel and a material for refining nickel. Background technique [0002] In the existing metal enrichment method, when the raw ore is used as the raw material to enrich the target metal, the fire method is used to enrich the metal, and the energy consumption is high. At the same time, these methods also have the disadvantage of low yield. The target metal contained in the tailings in the enriched metal production process cannot be further extracted and recycled, resulting in a lot of waste. [0003] Laterite nickel ore is a mineral resource formed by long-term weathering of nickel-bearing peridotite in tropical or subtropical regions, and is mainly distributed in tropical countries in the equatorial region. [0004] The processing technology of laterite nickel ore in the world can be summed up as follows: fire process and wet process, which are respectively introduced as follows: [0005] 1. Fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B23/02
CPCC22B1/02C22B23/005C22B23/02Y02P10/20
Inventor 赵江晨
Owner 北京千冶科技有限公司