Combined beneficiation method and combined beneficiation system for comprehensive recovery of associated iron-phosphate minerals

A beneficiation method and mineral technology, which is applied in the field of combined beneficiation method and system for comprehensive recovery of associated iron and phosphorus minerals, can solve problems such as inability to throw out gangue minerals, large heating boiler volume, and large investment in heating systems. Achieve the effect of reducing the grinding operation cost, occupying a small area, and investing in a small site and infrastructure

Active Publication Date: 2014-08-06
中冶沈勘工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For low-grade magnetite ore, discarding massive ore cannot fully remove a large number of gangue minerals, and it is easy to throw out useful minerals, which is difficult to achieve the purpose of greatly reducing production costs
[0004] Moreover, in the phosphate rock flotation process, the conventional phosphate rock flotation temperature is 37°C. According to this condition, the heat load of the flotation workshop is huge. high
[0005] Therefore, the beneficiation technology for the extremely low-grade associated phosphate iron ore still faces the disadvantages of high processing cost, high energy consumption, large floor area and low recovery rate.

Method used

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  • Combined beneficiation method and combined beneficiation system for comprehensive recovery of associated iron-phosphate minerals
  • Combined beneficiation method and combined beneficiation system for comprehensive recovery of associated iron-phosphate minerals
  • Combined beneficiation method and combined beneficiation system for comprehensive recovery of associated iron-phosphate minerals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Step 1, the raw ore goes through three stages, two closed circuits, crushing, and screening processes, and the fine ore is dry-selected;

[0090] The ore mined in the stope is transported by car to the receiving bin of the PXZ-1200 / 160 gyratory crusher, and then coarsely crushed by the PXZ-1200 / 160 gyratory crusher; the coarsely crushed ore is transported to the intermediate crushing buffer bin by the belt conveyor, Then it is conveyed to HP500 standard cone crusher by belt conveyor for intermediate crushing; the intermediate crushed product is conveyed by belt conveyor to the distribution bin before the stage of screening, and then sent to 2YAH2460 heavy-duty double-layer circular vibrating screen for stage of screening; the product on the stage of sieve It is transported to the intermediate crushing buffer bin by the belt conveyor, and forms a closed circuit with the intermediate crushing; the under-screen product is transferred through the No. 1 transfer station, tran...

experiment example 1

[0095] Experimental Example 1: Table 1 is the use of composite reagents composed of oxidized paraffin wax soap, fatty acid and MES as a collector, using the flotation method provided in Example 1 of the present invention at different temperatures of the flotation test results:

[0096]

[0097]

[0098] According to the test results, as the flotation temperature decreases, the concentrate yield and recovery rate gradually decrease, and the concentrate grade increases gradually with the decrease of temperature when the flotation temperature is higher than 11°C; when it is lower than 11°C, the concentrate grade begin descending. When the flotation temperature is 15°C, the grade of rough-selected phosphorus concentrate is 14.18%, and the recovery rate is 91.96%.

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Abstract

The invention belongs to the technical field of efficient development of ultralow-grade ore resources and comprehensive utilization of associated minerals, and in particular relates to a combined beneficiation method and a combined beneficiation system for comprehensive recovery of associated iron-phosphate minerals. The combined beneficiation method for the comprehensive recovery of the associated iron-phosphate minerals comprises the following steps: sequentially performing three-section and two-closed-loop crushing and screening flow on raw ores, and performing dry separation to obtain fine ores; performing two-section closed-loop ore-grinding flow on the fine ores, performing fine magnetic separation for three times, and concentrating by using a wash mill to separate iron ore concentrate and discharge tailings; performing one-time roughing, one-time scavenging and three-time concentrating on the tailings at the temperature of 10-15 DEG C to obtain phosphate ore concentrate by floatation. Compared with the prior art, the invention provides a comprehensive recovery scheme for magnetic iron ore resources and phosphate ore resources in ultralow-grade associated iron-phosphate minerals. According to the scheme, the separation cost is low, the efficiency is high, energy is saved, the space occupation is low, and the comprehensive recovery of the magnetic iron ores and the phosphate ores can be realized.

Description

technical field [0001] The invention belongs to the technical field of efficient development of ultra-low-grade ore resources and comprehensive utilization of associated ores, and in particular relates to a combined mineral processing method and system for comprehensively recovering associated iron and phosphorus minerals. Background technique [0002] For a long time, for ores with general iron content, people have adopted the process of "more crushing and less grinding" to reduce the particle size of the ore entering the grinding to reduce production costs, and also by adopting the "pre-discarding" method of fine crushing or even coarse crushing before entering the grinding. " way to reduce production costs and achieved significant economic benefits. [0003] However, the discarding of lump ore and large ore is mainly aimed at magnetite ore with higher grades, and the surrounding rock gangue entrained in the mining process is removed. For low-grade magnetite ore, discardi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C21/00
Inventor 母传伟窦习章戴翠红郝鹏程南世卿刘桂红吕小焕李晓娟
Owner 中冶沈勘工程技术有限公司
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