Tailings dry discharge is a new tailings disposal process that has gradually emerged in China in recent years. It refers to the tailings slurry output from the beneficiation process being subjected to multi-stage concentration, and then processed by efficient dewatering equipment such as dewatering vibrating screens to form slag with low water content, easy sedimentation and solidification, and suitable for on-site storage. The slag can be transported to a fixed location for dry storage.

As a common separation and classification device, the working principle of the cyclone is centrifugal settling. When the two-phase (or three-phase) mixture to be separated enters the cyclone from the periphery at a certain pressure, a strong three-dimensional elliptical strong rotational shear turbulent motion is generated. Due to the particle size difference (or density difference) between coarse particles (or heavy phase) and fine particles (or light phase), they are subjected to different sizes of centrifugal force, centripetal buoyancy, fluid drag, etc. Due to centrifugal settling, most of the coarse particles (or heavy phase) are discharged through the bottom outlet of the cyclone, while most of the fine particles (or light phase) are discharged through the overflow pipe, thus achieving the purpose of separation and classification. The combination of high-efficiency concentration cyclone, thickener, and dewatering screen can efficiently complete the concentration and dewatering process. After concentration and dehydration by the cyclone, the increase in bottom flow concentration creates favorable conditions for the dewatering screen operation, which can significantly improve the dewatering screen production capacity. The reduction of overflow concentration can effectively reduce the load on the thickener. By utilizing unique structural design, it is widely used in various beneficiation plants. In iron ore, even if the feed concentration is around 8%, the bottom flow concentration can still maintain over 70% and the yield is over 75%.

The machine adopts a brand new mechanical structure, which enhances the coagulation effect of flocculants on solid particles. It mainly includes several supporting systems: flocculant addition system, degassing tank, and automatic control system. At the same time, the central discharge tube has been extended to reduce the dispersion distance of solid particles and enhance the thickening effect. The biggest feature of a deep cone thickener, in addition to having the characteristics of an efficient thickener, is the deep cone. The height is much higher than other thickeners. The structure of the compression settlement zone is also more complex. Deep cone paste thickener is commonly used for tailings filling in pits, surface tailings pipeline transportation, and dry storage. For example, Xinwei Industrial and Mining Machinery's patented product, the high-efficiency transformation of the thickener, has been widely used due to its uniform ore feeding, smooth descent, and large processing capacity.

The high-frequency dehydration screen has a reasonable structure, unique and novel. It uses a vibration motor as the excitation source, and the material is thrown to achieve the purpose of screening treatment. It is a screen that uses multiple frequencies to dehydrate and is the latest type of dehydration screen. It is energy-saving, environmentally friendly, low-carbon and green, and meets the requirements of building a sustainable society. Mainly used in processes such as tailings dry discharge, the effect is extremely obvious, and it is a landmark equipment of the new generation of tailings dry discharge. Mainly used for grading and dewatering of small or tiny materials, as well as coal slurry recovery, especially suitable for coal slurry dewatering before plate and frame filter press systems.

Slurry pump is a centrifugal pump with high efficiency and relatively strong performance that has evolved in recent years due to the large particle size of material transportation. Currently, it is one of the indispensable equipment in various process flows of coal preparation plants. The wear-resistant slurry pump mainly refers to a new type of slurry conveying equipment that combines a layer of wear-resistant ceramics in the overcurrent parts, including pump sleeves, baffles, impellers, sealing rings, outlet pipes, etc. Its core technology lies in the use of ceramic metal composite manufacturing technology, ceramic precision machining technology, ternary flow design theory, finite element design method, as well as advanced ceramic processing experience and application experience. With the premise of maintaining operating efficiency, the service life of ceramic pumps is several times or tens of times longer than traditional high chromium white cast iron, cast steel, and rubber lined pumps.

A conveyor is a material handling machinery that continuously transports materials along a certain route, also known as a continuous conveyor. Conveyors can be used for horizontal, inclined, and vertical conveying, and can also form spatial conveying routes, which are generally fixed. The conveyor has a large conveying capacity, long transportation distance, and can also complete several process operations simultaneously during the conveying process, so it is widely used. Belt conveyor is a mechanical device driven by friction to transport materials continuously. It mainly consists of a frame, conveyor belt, idler roller, drum, tensioning device, transmission device, etc. It can transport materials on a certain conveyor line, forming a material conveying process from the initial feeding point to the final unloading point. It can transport both fragmented materials and individual items. In addition to pure material transportation, it can also be coordinated with the requirements of the production processes in various industrial enterprises to form a rhythmic flow operation transportation line. It can be used for horizontal or inclined transportation, and is very convenient to use. It is widely used in various modern industrial enterprises, such as underground tunnels in mines, surface transportation systems in mines, open-pit mining sites, and beneficiation plants. According to the requirements of the conveying process, it can be conveyed by a single machine, or by multiple machines or combined with other conveying equipment to form a horizontal or inclined conveying system, in order to meet the needs of different layout types of work lines.

The 500 ton/day tailings dry discharge project of a gold mine in Gansu Province adopts a multi frequency screening scheme, which can save investment by 40-50% compared to belt filters and box filters, reduce costs by 2-4 yuan/t, and achieve a return water rate of over 75%. Compared with the slurry discharge tailings pond scheme, adopting a dry discharge scheme can save investment, solve water source problems, eliminate hidden dangers, promote environmental protection, and benefit the country and the people.