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According to the production practice of Xinlongba Concentrator and the technological leading edge in the Yanfu Phosphorus Mine, the company decided to maximize the local mineral recovery rate by supporting local establishment of small ore dressing plants, especially the application output of new flotation reagents. To achieve the comprehensive use of resources. In 2003, our mine supported a new concentrating plant that processed 250,000 tons/year of ore from Fuquan City in terms of technology and manpower. After one year of construction, it has been put into operation, and its phosphate concentrate pipeline has been incorporated into our mine transportation system. , achieved the purpose of resources for my use. Now, driven by the influence of the Yanfu Phosphate Mine, other companies are setting up a concentrating plant to bring the comprehensive utilization of resources in the Yanfu Phosphorus Mine to a new level.
Using mixed beneficiation to treat a-layer or a+b layer ore technology, our mine has successfully recycled 150,000 tons of a-layer ore to produce the qualified phosphate concentrate required for wet-process acid production. The application not only extends the service life of the mine, but also makes full use of the national mineral resources. The implementation of the project has ensured that our mine resources have been rationally used and balanced production, and the comprehensive utilization rate of phosphate resources has been improved.
3.3 Prospects for Ore Recycling After 2002, with the progress of the Phosphate Compound Fertilizer Project of the head office, the demand for raw ore was growing rapidly. To this end, our mine utilizes the technical advantages of the new flotation reagents to carry out a large number of recycling and mixing of ore from various surrounding mines. It has been piled up in the pits or abandoned from the sporadic mining sites of Fuquan, Chun'an and Mine. The ore with a P2O5 content of about 20% is recycled and utilized. In two years, the ore is used for more than 200,000 tons.
Nowadays, the Yanfu Phosphorus Mine has organized clean mining of low-grade ore in small dams and other places. In just two years, it has recovered more than 600,000 tons of sporadic ore in the corner, which effectively guarantees the comprehensive utilization of ore. That is to say, in the two years from 2002 to 2004, the total amount of ore supplied from outside the Yingping main site has reached more than 1.57 million tons for selection, which has slowed down the mining pressure of the Yingping stop. Furthermore, the high grade ore of Yingping and the lower grade ore of the small dam have been selected and have been successful. Yingping currently has a grade of 29%, which can be matched with 23% of the grade of Xiaoba Mine. It is economical according to the ratio of 1:1. In this way, the phenomenon of mining and abandoning poverty in the stope at the current stage can be eliminated, and the resource recovery rate of the entire mining area is greatly improved.
The technological transformation of Xinlongba Concentrator and the commissioning of new flotation collectors have had a huge impact on the resource planning of the entire Yanfu Phosphate Mine, and the demand for concentrates in the leapfrog development stage of Hongfu Corporation In 2005, it has reached 2.17 million tons, of which the middle and low grade raw ore is selected to be about 2.5 million tons. It directly uses high-quality phosphate rock to produce 300,000 tons of phosphoric acid, and has actually formed a production capacity of 3.2 million tons of raw ore. To this end, with the comprehensive recycling of phosphate resources lead, in certain capital investment, reasonable ore, advance the development of the existing low-grade resources, good high and low, is the main direction of future production, research and development . The ultimate goal is to make the resources of the Yanfu Phosphorus Mine area fully and rationally utilized.
In view of the current status of resources and the urgency of underground mining, the Mine and Chemical Mine Design and Research Institute, in August 2004, discussed the mining in the west of the Mill River in the No. 2 ore body of the No. 2 ore body of the Mill. According to the resources of the place, the characteristics of the resources and the transportation conditions after the completion of the technical transformation of the mill, it is proposed to establish a 250,000 tons/year underground mining site according to the standard, and gradually explore the gently inclined medium-thick mine. The characteristics of body mining and the comprehensive mining and utilization of resources, and the reserve of technology and talents for large-scale underground mining in the future. The design has now entered the construction drawing stage.
4 Conclusion The Hongfu Company's Yongfu Phosphorus Mine has been digesting and absorbing the preliminary design technology of the Chemical Industry Research Institute of the Ministry of Chemical Industry for many years of production practice and technological transformation, and independently developed a new flotation collector, which is widely used in Yongfu. The phosphate rock flotation test and production greatly promoted the ore mining and ore dressing recovery rate in the Yanfu Phosphorus Mining Area, which drove the mining and selection technology advancement of the entire mining area and promoted the development of the entire economy. With the acceleration of the development of the head office, especially the proposal of the fine phosphorus chemical strategy of the head office – the comprehensive recycling of various elements in the minerals has been put on the agenda (now 20,000 tons has been established through technical transformation) The annual non-hydrofluoric acid project team and the recycling of iodine are also carried out in the trial work through the cooperation of relevant institutions.
The application of new flotation collectors offers us broad prospects. However, as the demand for resources increases and the demand for different concentrate categories, we will face greater challenges in the comprehensive utilization of phosphorus resources. We will have greater confidence, increase technological transformation, promote technological advancement, and promote the recycling of resources throughout the mine.
By the transformation of the beneficiation process and administered by collector WF-01, not only the successful recycling of the low grade phosphate ores, concentrates and the quality is improved, fine mineral was increased by 3.48%, the recovery rate 3 , 08%, sulfuric acid consumption decreased from the original 19Kg / t. concentrate to 14Kg / t. Concentrate, the direct cost of phosphorus concentrate production decreased from the original 97.14 yuan / ton to 72.07 yuan / ton, the annual production of phosphorus The mine has a calculation of 1.9 million tons, and the annual direct cost is 4,763,300 yuan.