V. Conclusion Yinshan Lead-Zinc Mine Concentrator combined with the actual problems encountered in site management, introduced the BRFS automatic drug delivery system produced by Beijing Research Institute of Mining and Metallurgy to transform the original manual siphon drug delivery system and improve the drug delivery. Accuracy and timeliness; the establishment of a new drug control room improves the working environment and labor intensity of the drug handler, and facilitates the connection between the flotation operator and the drug handler; re-laying the drug delivery platform to increase the drug drop , reducing the blockage of the drug tube. After more than one year of application, the transformation solved the original problems, and the cost of mineral processing chemicals decreased significantly, and the economic benefits were remarkable.
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Reform Practice of Drug Delivery System in Yinshan Lead-Zinc Mine
Silver Hill lead zinc ore processing plant with a lead-zinc ore processing, respectively, lead sulfur ore two operating systems, adding more types of agents, an agent added complexity, agents who frequently plug tube concentrator phenomenon has been in use for many years the old-fashioned manual Siphon administration method. The mode of administration is completely manual, the workload of the drug is large, the accuracy of drug delivery is low, and the phenomenon of drug deficiency occurs, which is difficult to adapt to the needs of the flotation process. At the same time, the flotation operator and the division of labor are operated on one or two floors, which is very inconvenient to connect, and the change of the dosage of the medicament often lags behind the needs of the flotation operation. As an important part of the flotation process, the accuracy and timeliness of the addition of chemicals directly affect the stability of the flotation operation and the improvement of production indicators. Therefore, the concentrating plant introduced the BRFS automatic drug delivery system produced by the Beijing Research Institute of Mining and Metallurgy to transform the original drug delivery system. After more than a year of practice, the effect of the transformation was very obvious, basically solved the original The existing problems ensure the stability of the beneficiation index and the reduction of the cost of the medicament.
First, the original drug delivery system
(I. Overview
Yingshan concentrator agent added a total of 30 points, seven kinds of agents were added to xanthate, pine oil, sodium cyanide, zinc sulfate, copper sulfate, thiourethane, diethyldithiocarbamate and the like. The dosage range of the drug is between 4 and 2000 ml/min. The drug delivery box is placed on the floor of the second floor, and the drug is discharged from the rubber tube through the drug tube to the administration point, and the drop is about 2 m. The second floor is equipped with a drug control room. When the flotation operator needs to adjust the dosage of the drug, the drug handler is notified. The drug dispenser manually adjusts the water stop clip on the rubber siphon tube, and the measuring cup measures the drug flow until the requirement is met.
(2) Main issues
1. The drug handler has a large workload and a bad working environment. According to statistics, the average dosage of each plaque agent is more than 30 times, and the time required for each adjustment is about 6 minutes. At the same time, in order to understand the adjustment requirements of the flotation operator in time, the entire class of the drug handler must be kept in the drug control room where the drug smell is mixed, which causes great harm to the physical and mental health.
2. The dosage of the drug is not adjusted in time, and the dosage error is large. The flotation operator needs about 6 minutes after the request for adjusting the medicament to the drug delivery worker, so that the drug can adjust the drug flow rate, and then the time required for the agent to act on the flotation operation is longer. The situation has changed significantly, which has a negative impact on production indicators. At the same time, the dosage of the medicament is completely controlled by the human body, and the randomness is large, and the administration accuracy is very low, which does not meet the production requirements.
3, the drug drop is small, the drug tube is easy to block. The medicine is placed on the floor of the second floor by the medicine tube to reach the administration point. The drop of the medicine is about 2m, and the distance of some medicines is too long, the flow rate of the medicine is slow, and the clogging of the medicine tube occurs directly. The waste of pharmaceuticals has an adverse effect on production indicators.
Table 1 Accuracy of administration before transformation (October 2000)
Shift
11 to 14 days
15-18 days
19 to 22 days
average
Standard 90%
1
2
3
4
83.5
87.1
82.8
82.6
86.9
90.5
86.4
85.5
86.0
88.7
84.8
86.0
85.5
88.8
84.6
84.7
―4.5
―1.2
―5.4
―5.3
4. The waste of pharmaceuticals is serious. Because there is no credible statistical data on the dosage of the drug, it is impossible to assess the dosage of the flotation operator. The flotation operator is less aware of the need to save the drug, and the phenomenon of wasting the drug is more serious.
Second, the transformation plan
Based on the on-site investigation, on the basis of sufficient argumentation and comparison, it was decided to modify the drug delivery system of the concentrator as follows:
(1) Introducing the BRFS automatic drug delivery system produced by the Beijing Research Institute of Mining and Metallurgy to replace the original manual siphon delivery system. This set of drug delivery system is based on the industrial computer, and special software is prepared. It is equipped with solenoid valve, printer and display. It can adjust the dosage of all dosing points in time, and technically solve the accuracy, timeliness and record of drug delivery. Straightness issues have created favorable conditions for ensuring the stability of flotation operations and enhancing the management of pharmaceutical dosage.
(B) administering a new control room next to the flotation machine, spaced from the wall of the flotation machine aluminum alloy with the glass. The dosage of each dosing point is displayed on the computer screen. The flotation operator can directly see the dosage of each dosing point. When it is necessary to adjust the dosage of the agent, it is only necessary to directly explain to the applicator, and the applicator should follow the prescribed procedure. It can be input through the keyboard, and each adjustment takes less than 1 minute.
(3) Rebuilding a 1.56m high-medicine platform on the ground floor of the second floor, placing all the medicine boxes on the platform, increasing the drop of the drug and ensuring the smooth flow of the drug tube.
Third, the transformation effect
Through this transformation, the problems of the original drug delivery system have basically been solved. Specifically in the following aspects:
(1) The working environment and labor intensity of the drug medicinal workers have been greatly improved. It is not necessary to keep the entire class on the second floor with mixed odors as before, and it is only necessary to conduct regular inspections to ensure the smooth delivery of the drug delivery system.
(2) The time for adjusting the dosage of the agent after the transformation is controlled within 1 min, the timeliness of the administration is well guaranteed, and it is more conducive to the stability of the flotation operation and the improvement of the production index. At the same time, the accuracy of administration was improved obviously, and the accuracy of administration was increased from less than 90% before the transformation to more than 95% after the transformation.
Table 2 Accuracy of administration after transformation (January 2001)
Shift
11 to 14 days
15-18 days
19 to 22 days
average
Standard 90%
1
2
3
4
95.5
97.1
96.8
96.3
96.8
96.5
96.4
95.8
96.0
96.8
96.0
96.5
96.1
96.8
96.4
96.2
+6.1
+6.8
+6.4
+6.2
(3) Because of the significant increase in the drop in drug delivery, the clogging of the drug tube is also greatly reduced, which ensures the stability of production and reduces the loss of the drug.
(4) The drug data stored by the computer has strong credibility and persuasive power, and the evaluation of the dosage of the flotation operator can be realized. The flotation operator enhances the awareness of saving the use of the drug and wastes the drug. Get effective control.
Fourth, economic benefits
The modification of the drug delivery system has achieved certain economic benefits on the basis of solving the problems existing in the original drug delivery system, and directly represents the decline in the cost of the dressing agent. The system was completed at the end of December 2000 and officially put into use in January 2001. In 2001, the cost of mineral processing chemicals decreased by 17.4% compared with 2000, and the cost of raw ore chemicals decreased by 0.49 yuan. In 2001, the total ore volume was 773,300 tons, and the annual cost of chemical treatment was 378,900 yuan.
Table 3 Comparison of pharmaceutical costs before and after transformation
Pharmacy name
unit price
/(yuan·kg -1 )
Unit consumption / (g·t -1 )
Unit cost / (yuan·t -1 )
2000
2001
2000
2001
Sodium cyanide
Zinc sulfate
Copper sulfate
Ethyl xanthate
Butyl xanthate
Pine oil
Ethyl sulfide
Thiocarbamate
total
13.70
1.90
8.00
6.50
9.70
5.60
19.40
26.00
13.80
103.80
110.90
86.10
29.10
77.20
5.80
6.00
10.80
88.70
85.40
83.80
27.90
53.00
3.80
5.60
0.19
0.20
0.89
0.56
0.28
0.43
0.11
0.16
2.82
0.15
0.17
0.68
0.54
0.27
0.30
0.07
0.15
2.33
Si Hongxin
(Anhui Longqiao Mining Company, Minjiang, Anhui 231555, China)