48 results about "Rock weathering" patented technology

The present invention is a segmental desliming and flotation process of low-grade refractory weathered collophosphine. The process steps are as follows: raw ore is coarsely crushed and finely crushed, then added with a surface treatment agent, and scrubbed in an ore washing machine; the pulp after scrubbing is Enter the shaking table for one stage of desliming, coarse minerals enter the next stage of desliming, and fine sludge is treated as ore slime; coarse minerals are subjected to grinding treatment, and the grinding pulp is subjected to second stage desliming; the deslimed ore pulp enters the positive and negative floating The flotation concentrate and flotation tailings are obtained; the flotation concentrate is concentrated and filtered to obtain phosphorus concentrate products and concentrate backwater, and the positive flotation tailings and reverse flotation tailings are respectively concentrated and filtered to obtain Tailings products and tailings return water, the slime deslimed in the two stages are concentrated and filtered to obtain slime products and slime return water; according to needs, the concentrate return water, tailings return water and slime return water are recycled Respectively return to the flotation operation and each return point of the ore washing machine for recycling; the invention can improve the quality of phosphorus concentrate and realize the resource utilization of low-grade weathered collophosite.

The invention discloses a soft rock weathering and breaking experimental apparatus and an experimental method thereof. The soft rock weathering and breaking experimental apparatus is placed on a frequency modulatable vibrating table and is provided with a transparent inner barrel and an outer barrel. A required volume of water can be added by a water inlet on a barrel upper cover; a water outlet and a gas delivery opening are formed at the bottom of the experimental apparatus; a plurality of layers of round hole sieve plates are arranged in the inner barrel; hole diameters of the round hole sieve plates are sequentially decreased from top to bottom according to a standard sieve hole size of a laboratory; micro high-strength frequency modulatable fluorescent lamps and monitoring probes are placed in the interval between the inner barrel and the outer barrel above each sieve; geotechnical cloth is arranged for isolating soil and filtering water. According to the soft rock weathering and breaking experimental apparatus and experimental method which are disclosed by the invention, effects of variable natural factors on soft rocks are controlled in a room by simulation so as to research influence of each factor on soft rock weathering; by the monitoring probes, the weathering and breaking process of each layer of soft rock particles can be observed and recorded, and the weathered broken rock particles can be automatically sieved and are continuously weathered and broken; the soft rock weathering and breaking experimental apparatus and experimental method have the advantages of being visual, convenient, rapid, accurate and the like.

The invention discloses a setting method of a thick loose water-bearing layer sand prevention safe coal and rock pillar under the water pressure effect. The method comprises the following steps of performing a liquid and plasticity limitation test on a clay layer positioned under a thick loose water-bearing layer covering a coal seam to be explored; performing a dry saturated water absorption rate test and a disintegration test on bed rock weathering zone rock positioned at the side surface of the water-bearing layer; determining whether the loose water-bearing layer is positioned in a sealed water pressure maintaining structure or not according to the liquid and plasticity indexes of the clay layer, the dry saturated water absorption rate of the bed rock weathering zone rock, and the disintegration performance parameter obtained in the tests; and if the loose water-bearing layer is positioned in the sealed water pressure maintaining structure, determining the thickness H<sp> of the sand prevention safe coal and rock pillar under the water pressure effect, and setting the sand prevention safe coal and rock pillar of the coal seam to be explored under the thick loose water-bearing layer under the water pressure effect according to the thickness. When the method provided by the invention is used for exploitation, the occurrence probability of coal mine sand inrush disaster accidents can be reduced. The method supplements and completes the theory of the coal mining sand prevention safe coal and rock pillar setting method under water bodies in China, and has high practical values.