I. Introduction This test sample was received on January 4, 2011, and the total amount is about 60 kg. Sampling and mixing, drying and testing, moisture is about 18%. The grade of the original ore Au is about 0.60g/t, and the fineness of the ore sample is fine -200 mesh accounts for 87%. The purpose of the experiment is to conduct a detailed ore dressing feasibility test on this high gold tailings to determine whether it has production value. A large number of flotation tests and cyanide leaching tests. Finally achieve the following indicators: The effect of flotation with conventional medicaments is not good. The effect of TJ using new composite agents is obvious. The recovery rate of gold is generally 56%-57%, the grade of gold concentrate is 1.65-1.37g/t, the enrichment is relatively low, and the concentrate yield is 20.4-25.7%, the grade of the tailings Au of the ore by flotation is about 0.35g/t; The leaching effect is good with conventional cyanidation. When the leaching time is 18h, the cyanidation recovery rate of the cyanide residue is 0.1g/t gold is 83.33%, which means that 0.5g gold can be collected per ton from the tailings. The benefits are considerable. Second, the exploration of different agents (1) The process flow chart of flotation is shown in Figure 1: (2) The results of the flotation test are shown in Table 1. Table 1 Exploratory flotation test results table for different agents (III) Conclusion From the above experimental results, the recovery rate of the concentrate of the conventional pharmaceutical isoamyl xanthate is only 20.88%, while the effect of the new drug TJ is obvious, and the gold recovery rate of the gold concentrate is 42.75%. Further verification experiments were carried out on it. Third, different conditions comparison test The process flow of flotation is shown in Figure 2. Figure 2 Flow chart of different conditions comparison test flotation process (2) The results of the flotation test are shown in Table 2 below. (Table 2 Comparison of different conditions for flotation test results) (III) Analysis of conclusions From the above experimental results, the effect of Experiment 1 Experiment 2 Experiment 3, 4 and pH than plus copper sulfate activation effect is good. Fourth, flotation verification test (1) The process flow chart of flotation is shown in Figure 3. Figure 3 Flotation verification test process flow chart (2) The results of the flotation test are shown in Table 2. Table 2 Flotation verification test results table (III) Analysis of conclusions It can be seen from the above figures that the test 2 and test 4 indicators are better, the gold recovery rates are 56.22% and 57.24%, respectively, and the tailings grades are 0.33g/t, 0.34g/t, respectively, but the concentrate grade is lower. At 1.65g/t-1.37g/t, the yield is 20.40%-25.07%, which means that the mine is difficult to enrich and the concentrate grade is difficult to increase. It also shows that the gold in the limestone is relatively fine and uniform. The following is an exploration experiment of cyanidation. V. Cyanidation test (1) Cyanidation conditions experiment 1, 2, 3 215g wet ore, the pH value of this ore is adjusted to about 12 with CaO (the pH value must be kept between 11.5-12.00 when leaching, the pH is stable). After half an hour of reaction, 2 g of sodium cyanide is added, respectively at 6h, 12h. Take a small sample and measure its sodium cyanide concentration for 6h: 28.6/million, 12h: 25.8/million. After 18h, the leaching test is finished. The final concentration and consumption of sodium cyanide are measured: concentration is 22.8/10,000, consumption is 3.72kg. /t. (2) Cyanidation conditions experiment 4,5 244g wet ore, adjust the pH value of the ore sample to about 12 with CaO (pH value must be kept between 11.5-12.00 when leaching, pH is stable). After half an hour of reaction, add 2 g of sodium cyanide, take a small sample at 24h. Its sodium cyanide concentration: 25.8 / 10,000, sodium cyanide consumption 2.36kg / t. The leaching test was terminated after 30 h, and the final concentration and consumption of sodium cyanide were measured: 18.4/10,000, 4.55 kg/t. (iii) Leaching data for different time periods of the original tailings grade at Au 0.60g/t Table 4: Table 4 Leaching data table for different time periods of original tailings grade at Au 0.60g/t Numbering hour Slag grade g/t Leach rate% NaCN consumption kg/t NaCN concentration / 10,000 Au Au 1 6h 0.20 66.67 2.13 28.6 2 12h 0.20 66.67 2.90 25.8 3 18h 0.10 83.33 3.72 22.8 4 24h 0.00 100.00 2.36 25.8 5 30h 0.00 100.00 4.55 18.4 (4) Conclusion As you can see from the above figures, the longer the time, the better the indicator. However, the higher the cost, the 18 hours recommended, as the cyanide time condition for future production. At this time, the leaching rate of gold is 83.33%, and the tail slag grade is about 0.1 g. Conclusion (1) The tailings belong to the refractory limestone type gold deposit, and the gold knuckle is finer and evenly distributed in the limestone. (2) The effect of flotation with conventional medicaments is not good, and the effect of using new composite agent TJ is obvious. The recovery rate of general gold is 56%-57%, the grade of gold concentrate is 1.65-1.37g/t, the enrichment is relatively low, fine The ore yield is between 20.4 and 25.7%. The sale of this concentrate is difficult. (3) The leaching effect with conventional cyanide stirring is very good. When the leaching time is 18h, the cyanidation recovery rate of the cyanide slag grade of 0.1g / t gold is 83.33%, which means that the tailings can receive 0.5 per ton. g gold, the benefits are considerable, but whether this process can work in the local environment is still unknown. If Zhaoyuan's zero-emission, environmentally-friendly technology can be used, the whole mud cyanide leaching gold and activated carbon adsorption process can be carried out. of gold to silver. (4) Therefore, tailings-200 mesh accounted for 87%, the particle size is fine, no need to re-grind, you can refer to the gold extraction process of sulfuric acid slag in Qixia Guanli Gold Mine (the original slag contains about 1g of gold, can recover about 0.3g) Gold, 20g silver, this process has no grinding, simple equipment, low energy consumption, less equipment investment, and the total cost of processing one ton of this slag is about 120 yuan). The cyanide benefit of this tailings is estimated to be 0.5g*300 yuan/g-120 yuan=30 yuan/t, and the calculated benefit of processing 500t per day is 15000 yuan/day. (5) This experiment is only responsible for the sample, and all chemical element analysis is carried out at the Ludong Analysis Center. The process experiments performed are authentic and have reference value. Stretched and spinning bearing pulldy for Auto Tensioner and Idler. 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Figure 1 Flow chart of exploration and flotation process for different pharmaceutical agents