62results about How to "Reduce ore" patented technology

The invention relates to a mineral processing process for processing mixed ore of magnetic iron ore and hematite-limonite ore. The mineral processing process comprises steps as follows: raw ore containing the mixed ore of the magnetic iron ore and the hematite-limonite ore is smashed and then subjected to two-stage continuous ore grinding; overflowing ore of a secondary classifying cyclone is subjected to two-stage low-intensity magnetic separation and one-stage fine screening and separation in combination of a single magnetic separation, fine screening and regrinding process for processing magnetic ore; under the condition of rougher ground ore particles, a part of undersize qualified magnetite concentrate products are firstly obtained, the other part of oversize products are combined with one-stage high-intensity magnetic separator concentrate and two-stage low-intensity magnetic separator tailings to serve as middlings, and the middlings are subjected to three-stage ore grinding classification operation for regrinding and separation; and overflowing ore of a tertiary classifying cyclone is subjected to three-stage low-intensity magnetic separation and high-intensity magnetic separation, fine-grain qualified tailings are thrown again, three-stage low-intensity magnetic concentrate and two-stage high-intensity magnetic concentrate are combined to obtain mixed magnetic concentrate, the mixed magnetic concentrate is subjected to a reverse flotation process for separation, and a qualified flotation concentrate product is obtained. According to the mineral processing process, the mixed ore of the magnetic iron ore and the hematite-limonite ore with different dissemination particle sizes is reasonably processed, the qualified iron ore concentrate product is obtained, and the mineral processing process is economical, energy-saving and environment-friendly.

The invention relates to an efficient low-consumption ultrafine crushing-ore grinding process. The process is characterized in that a high-pressure grinding roller mill is utilized for carrying out ultrafine crushing, wherein the particle sizes of products subjected to the ultrafine crushing are -3.2mm; the products are pre-graded, the pre-graded fine-fraction products directly enter a sorting step without needing a primary grinding step, the pre-graded coarse-fraction products enter the sorting step after being subjected to ore grinding in the primary grinding step. According to the process, by carrying out pre-grading, the over-crushing of the dissociated fine-fraction products in the primary grinding step is avoided, the quantity of ores entering the primary grinding step is remarkably reduced, the processing capability of an ore grinding system is improved, the sorting index of ore concentrate products is improved, and meanwhile, the energy consumption is saved.

The invention discloses a benefication method for recovering specularite. The method comprises the processes of primary grinding, grading, primary low intensity magnetic separation, and tailings discarding by primary high intensity magnetic separation; rough concentrate pre-classification by the primary low intensity magnetic separation and the primary high intensity magnetic separation, secondary grinding, secondary low intensity magnetic separation to obtain concentrates, secondary high intensity magnetic separation to obtain concentrates; and selective flocculation desliming secondary conducted on high intensity magnetic separation tailings (middlings), and anionic reverse flotation. The method further comprises the step of arranging a cylindrical slag separating sieve before the primary high intensity magnetic separation. With the advantages that the iron concentrate grade and the iron recovery are high, the loss of granular iron minerals is low, the mineral process flow is short,concentrates and tailings can be obtained in advance and the energy consumption of the benefication is low, the invention can be used not only for selecting specularite ores, but also for selecting weakly magnetic iron minerals, such as hematite, goethite, siderite, limonite, and the like.

The present invention is a method for treating phosphate ore tailings by adopting a single positive flotation process. The phosphate ore tailings are directly fed into a roughing flotation machine for one roughing, and an appropriate amount of pH regulators and inhibitors are added during the roughing. , anion collector; the foam product of the roughing operation is classified according to the particle size of 325 mesh; the product of +325 mesh is sent to the grinding operation, and it is ground to the grinding fineness required by the flotation operation; it is ground after the grinding operation The product and the product of ‑325 purpose are put into the second roughing operation; the foam product of the second roughing is selected 3~4 times, and the product in the tank is swept 1~2 times to obtain the concentrate product. The grade and recovery rate of the final phosphorous concentrate obtained by the invention are high, the process is simple, and industrialization is easy to realize. It not only greatly alleviates the pollution caused by phosphate rock tailings to the environment, but also has great significance for the efficient utilization and recycling of phosphate rock resources in my country.

The invention relates to a double-tailing discharging gravity-floating combined separation method and a device thereof, and belongs to a double-tailing discharging gravity-floating combined separation method aiming at slime and a device thereof. The aim of the invention is to solve the technical problems existing in the prior flotation machine that the separation effect of ultrafine grains is lowand the upper limit of the column flotation is difficult to be effectively related with the lower limit of the heavy medium separation. The method comprises three steps of crude ore flotation and rough separation and graded tailing discharging, gravity scavenging tailing discharging and gravity separation finished ore reflotation. The double-tailing discharging gravity-floating combined separation machine comprises a jet flow flotation column, a first tailing discharging graded device and a secondary tailing discharging graded device; the first tailing discharging graded device is arranged below the jet flow flotation column, a cyclical middling underflow opening of the first tailing discharging graded device is connected with the secondary tailing discharging graded device, and a centralore feeding pipe of the secondary tailing discharging graded device is connected with the jet flow flotation column. The method and the device have multiple effects of coarse slime separation and highly selective floatation of fine coal and ultrafine coal, thereby improving the efficiency of the gravity-floating combined separation.