RU2181435C1 - Method of preparation of filling mixture - Google Patents

Abstract

FIELD: mining industry. SUBSTANCE: method is applicable at enterprise including concentrating mill and mining minerals by system filling of worked out spaces. Method includes supply of tailings of concentrating mill through circular pipeline with possibility of direction into several filling complexes located successively over its length. A part of tailings at each filling complex is directed from circular pipeline and separated in hydraulic cyclone into sands and overflow. Separated from hydraulic cyclone overflow is thinned product which is supplied together with hydraulic cyclone sands for forming of filling mixture, and overflow is returned to circular pipeline. Formed in mixer is filling mixture from sands, thinned product and additives. EFFECT: provided year-round transportation of tailings of concentrating mill for low-cost preparation of filling mixture for several users. 1 dwg

Description

 The invention relates to the field of mining and can be used, for example, in mining enterprises, which include an enrichment plant and conduct mining of minerals by development systems with the laying of the worked out space.

 A known method of preparing the filling mixture, including hydrocyclone tailings of the processing plant to obtain sand, which is used as an inert filler in the preparation of the filling mixture (Smoldyrev A.E. Technology and mechanization of filling work- M .: Nedra, 1974, p. 144).

 The disadvantage of this method is the loss of part of the tails with the discharge of hydrocyclones, as well as the inability to create a continuous technology for preparing the filling mixture and laying the worked out space.

 The closest in technical essence and the achieved result to the claimed one is the method of preparing the filling mixture, including feeding the tailings of the processing plant through the pipeline to the filling complex, separating the tailings in the hydrocyclone into sands and drains, forming the filling mixture from sands and additives. (Patent RU 2019713, IPC Cl. 6 E 21 F 15/00, publ. 15.09.94).

 The disadvantage of this method is the loss of part of the tailings with the discharge of hydrocyclones, as well as the inability to use one pipeline to service several filling complexes.

 The objective of the invention is the creation of in-line technology, which involves reducing the cost of preparing the filling mixture and transporting the tailings of the processing plant when servicing several mines.

 The technical result of the invention is to provide year-round transportation of the tailings of the processing plant to prepare the filling mixture to several consumers at the lowest cost.

 The technical result is achieved by the fact that in the known method of preparing the filling mixture, which includes feeding the tailings of the processing plant through a pipeline to the filling complex, separating the tailings in the hydrocyclone into sands and drains, forming the filling mixture from sands and additives, the pipeline is circular with the possibility of feeding tails into several filling complexes located sequentially along its length, while in the filling complex a condensed product is emitted from the hydrocyclone drain, which together with sand mi hydrocyclone served on the formation of the filling mixture, and the drain, which is returned to the annular pipeline.

 This set includes features, each of which is necessary, and all together are sufficient to achieve the specified technical result in all cases of using the invention.

 Returning the drain to the pipeline and making it circular with the possibility of feeding the tails to several filling complexes located successively along its length allows the liquid part of the tails to be used to transport them through the pipeline to several filling complexes at the same time and to maintain a constant high flow velocity in the pipeline, thereby the most normal operation of the pipeline in winter, which is especially important for mining enterprises located in areas with rovymi climatic conditions.

 Isolation of the condensed product from the discharge of the hydrocyclone in the filling complex and its direction, together with the hydrocyclone sands, to the formation of the filling mixture makes it possible to more fully isolate the solid part of the tails for laying.

 The method of preparing the filling mixture is illustrated in the drawing, which shows a diagram of a circuit of apparatus for preparing the filling mixture for two filling complexes.

 A method of preparing a filling mixture is as follows.

 The initial tailings of the processing plant through a previously laid annular pipe 1 is fed to the surface filling complexes 2 of mines or mines. The composition of the filling complex 2 includes a hydrocyclone 3, a thickener 4 and a mixer 5. In a hydrocyclone 3, the tails are divided into sands, which are used in the filling mixture, and a drain into which sludges and coarse clay particles go. The discharge of the hydrocyclone 3 enters the thickener 4, where the sludge and clay particles settle and thicken to form a condensed product. The condensed product, together with the sands of the hydrocyclone 3, is fed to the formation of the filling mixture in the mixer 5.

 In addition to sands of hydrocyclone 3 and thickened product, in mixer 5, additives are added, for example, binder and plasticizers, in the preparation of a hardening filling mixture, or water, when the filling is in progress, depending on the type of bookmark. From the mixer 5, the finished filling mixture is piped to the laid workings. For laying the pipeline to the workings to be laid, existing capital and preparatory workings can be used or wells can be drilled from the surface.

 The thickener 4 is discharged to sump 6, from where it returns to the annular pipe 1 by pump 7. The drain is almost free of solid phase and is used as a transport medium to maintain the required flow rate in the annular pipe 1 and feed the tailings to the next filling line sequentially located along the length of the annular pipe 1 complex 2, where the process of preparing the filling mixture is similar.

 To remove excess tailings from the annular pipeline 1, which arises due to the uneven productivity of the processing plant and surface filling complexes, the direction of the excess tailings in the tailings pond (not shown in the drawing) can be provided with a similar release of the solid phase in the hydrocyclone and the return of the hydrocyclone discharge to the annular pipeline 1.

 An example of a specific implementation.

 The Norilsk Mining Company is producing copper-nickel ores in the mines: Mayak, Komsomolsky Vostochny, Komsomolsky Zapadny, Taimyr, Oktyabrsky and Komsomolsky Skalisty with development systems with the laying of worked out space. The extracted ore goes to the Talnakhsky enrichment plant, which produces copper-nickel concentrate.

 For disposal of the resulting tailings, according to one of the options, the surface filling complexes of these mines are connected via an annular pipeline 1 with a diameter of the working branch 8 equal to 273 mm. The drain branch of the pipeline 9 is 159 mm in diameter. The tailings of the enrichment plant are pumped from the thickener to the mixer by the pump STY-AN 8.6, from which they are pumped by the Priceag pump into the working branch 8 of the annular pipeline 1 (pumps, thickener and mixer are installed on the industrial site of the enrichment factory and are not shown in the drawing).

 To ensure uninterrupted operation of the processing plant and surface filling complexes of 2 mines, at least two thickeners and two mixers can be installed at the processing plant, connected to each other and to the annular pipe 1 with the possibility of alternating operation.

 At the filling complexes 2 of each of the mines, part of the tailings is diverted from the annular pipeline 1 in an amount that ensures the laying of the worked out space in accordance with the mining plan. After separation of the sand and the condensed product, the discharge of the thickener 4 is returned to the annular pipe 1, maintaining the necessary speed of flow in it.

 The isolated sands and condensed product are fed into the mixer 5, into which the necessary additives, for example cement, are also added, and the finished mixture is sent to the excavations to be laid.

 Another option is possible, when not all filling complexes 2 of the enterprise are connected by a ring pipe 1, but only those located in relative proximity to each other. For the conditions of the Norilsk Mining Company, stowage complexes of the Taimyrsky and Oktyabrsky mines and the stowage complexes of the Komsomolsky Zapadny and Komsomolskiy Vostochny mines can be connected by separate ring pipelines.

 In both cases, the drain branches of the annular pipelines 1 are connected to a mixer, into which the drain is returned and reused as a transport medium. Excess liquid phase can be fed to the tailing dump.

Claims (1)

 A method of preparing a filling mixture, including feeding the tailings of the processing plant through a pipeline to a filling complex, separating the tailings in a hydrocyclone into sands and drains, forming a filling mixture of sands and additives, characterized in that the pipeline is circular with the possibility of feeding tails to several filling complexes located sequentially along its length, while in each filling complex a condensed product is separated from the discharge of the hydrocyclone, which, together with the sands of the hydrocyclone, is fed to transform of a mixture of fill and drain, which is recycled into the annular duct.