Overview of the development trend of strontium iron ore beneficiation technology

Iron ore beneficiation technology trends

1 equipment is large, further energy saving and consumption reduction

Energy saving is the eternal theme beneficiation plant, and one of the key measures to achieve energy saving is the large-scale equipment, improve labor productivity. Throughout the history of iron ore beneficiation at home and abroad, the nature of ore is from simple to complex, and the quality requirements of the products are getting higher and higher. Therefore, the beneficiation process is developed from a single process to a joint process, and the ore dressing equipment is developed from small to large. The iron ore beneficiation equipment mainly applies to large-scale rolling machines, large-scale self-grinding machines and large-scale special fine grinding machines suitable for iron ore. It is suitable for large-scale strong magnetic equipment and flotation equipment of fine-grained weak magnetic iron ore, high torque. The large-capacity and high-bottom concentration concentrator is suitable for the development of high-efficiency large-volume filtration and pressure filtration equipment for fine-grained iron concentrate filtration, thereby achieving the goal of simplifying the process flow, saving energy and reducing the labor productivity of the concentrator. .

2 Process and pharmaceutical research refinement

As the ore is increasingly “poor, fine, and miscellaneous”, whether it is crushing or grinding or sorting, it is necessary to formulate a fine and reasonable process based on further research on the nature of the ore to support the ore. Refractory and high costs, such as change the past no matter how much grinding fineness are used ball mill grinding in the end a way of using a ball mill completed in fine grinding tower mill completed micro-fine grinding, ISA grinding and other complete pole Micro-fine grinding, although the equipment configuration is more complicated, the overall energy saving is more than 50%, and the total grinding energy consumption is minimized from the surface. In the sorting process, stepwise fine sorting is adopted. For example, when the iron mineral is unevenly embedded in the thickness, the coarse subdivision is selected. For the case of many kinds of iron minerals and complex gangue types, step magnetic can be used. The addition of cascade flotation, the separation of the middle ore, the classification of the gangue, and the separation of the positive and negative float processes, thereby reducing energy consumption and improving the quality and recovery of iron concentrate.

In the aspect of flotation reagents, the research on the selectivity of flotation reagents and the flotation reagents at normal temperature is carried out. According to the characteristics of different deposits, special medicaments are developed. Under the premise of ensuring the ability of medicaments to collect, selective research is carried out to realize a mine. A drug or a multi-drug in a mine, thereby greatly improving the quality and recovery rate of iron concentrate.

3 strengthen the research on small, poor and were associated multi-metal mine

Efficient use of fine-grained iron ore, super-poor iron ore and multi-metal associated ore is the most effective way to expand China's resources. The development of special-purpose special equipment and specialty chemicals is the basis for the utilization of fine-grained ore and ultra-poor mines. For large-diameter and high-field permanent magnet bulk tailing equipment suitable for ultra-poor tailing, for large-scale electromagnetic strong magnetic equipment, it is suitable for large-scale degreasing equipment for ultrafine iron ore flocculation and desilting. Large flotation equipment for fine grain iron ore flotation. Strengthen the development of dispersants, flocculants and sludge-resistant flotation agents.

The utilization rate of polymetallic associated ore resources in China is extremely low. The Baotou Bayanbo iron ore mine is a large-scale polymetallic symbiotic composite iron ore. It has found 71 elements and more than 170 kinds of minerals, and only a few minerals have been developed and utilized. Panzhihua vanadium- titanium magnetite ore contains 83 kinds of minerals. Titanium is an extremely important and very scarce beneficial component. Its economic value far exceeds that of iron concentrate itself. It should further strengthen the research on multi-metal comprehensive utilization and research on polymetallic ore. It is necessary to broaden the professional field and adopt a combination of smelting and smelting to make it more economically viable. For example, preferential sorting is carried out for easy ore dressing. For refractory ore, comprehensive enriched ore can be formed and integrated by wet smelting technology to achieve metal extraction. The overall cost of the whole process is the lowest.

4 automatic control and online detection technology

The automatic control level of iron ore mines in China is relatively low, and most of them are concentrated on the concentration control, particle size control and online inspection of iron concentrate grades in grinding and grading operations. With the large-scale equipment and fine management, it is an inevitable development trend to realize full-process automatic control, full-process tracking, information feedback and automatic adjustment.

5 Mine pollution control and ecological restoration

As the grade of mined ore is getting lower and lower, ecological and environmental problems such as water pollution, surface subsidence, vegetation removal, waste discharge, soil degradation and pollution, and loss of biodiversity will become more and more prominent.

In order to realize the sustainable development of the mining area, it is necessary to further strengthen the mine pollution control and ecological restoration with the focus on water pollution control, tailings/waste minimization, and land reclamation in the mining area, and implement the systematic environmental management of the mining area in the whole process of mining development. Safeguard. For example, further develop and promote high-density sedimentation (HDS) treatment of mine acid heavy metal ion wastewater, bioreduction of sulfuric acid reduction bacteria, etc., to ensure on-site purification of contaminated water quality in mining areas; accelerate research and promotion of waste-free mining technology, and remove mineral waste/tail As a filling material, the mine fills the goaf, which not only effectively controls the surface subsidence and deformation, but also solves the resource utilization of the beneficiation tailings, and maximizes the “contaminant reduction, resource reuse and recycling in the development of mineral resources”. "Building non-waste mines; further strengthening the land of Fosun in the mining area, using advanced land reclamation technology, carrying out ecological reconstruction of the mining area, especially the vegetation restoration of heavy metal contaminated wasteland, restoring the original ecosystem of the mine or creating a new one." An ecosystem that is in harmony with the local natural world.