46results about How to "Will not affect the ecological environment" patented technology

The invention discloses a mineral processing process capable of producing high-end chemical-stage chromite concentrates. The process uses a method of combining the magnetic reconnection process with the stage-grinding and stage-concentration to achieve sorting of the high-grade chromite, and the process comprises following steps that a, raw ore is subject to rough grinding through a rod mill, andstrong magnetic tailings discharging is carried out; b, the mass concentration of strong magnet rough concentrate ore pulp is concentrated to 50% to 60%; c, the concentrated ore pulp is subject to fine milling through an ISA mill, and two-time strong magnetic selection is carried out; d, high magnetic concentrates and middlings are subject to repeated grading through a yunnan tin table concentrator, and a final product is obtained. The high-quality chromite concentrates with the Cr2O3 content larger than or equal to 60% and the impurity SiO2 content smaller than or equal to 1.5% and capable ofmeeting the high-end chemical industrial chromium compound producing needs are obtained, the chromite recycling rate is ensured, the process flow is simple, the production cost is low, a chemical flotation agent does not need to be added, the pollution to the environment is small, the higher economic benefits and social benefits are achieved, and the process is worth of applying and popularizing.

The invention discloses an ecological concrete with low manufacturing cost and a preparing method of the ecological concrete.The ecological concrete with low manufacturing cost is prepared from silty soil, cement, a water reducing agent, a thickening agent and water at the mass ratio of 1000:(120-200):5:0.02:(320-460).Coastal silty soil and mixing water are weighed according to the mass ratio and put into a stirring machine to be stirred, and the silty soil is fully mashed and liquefied; cement and an additive are added into the fully-liquefied silty soil and stirred, and then newly-stirred cement soil is obtained; the newly-stirred cement soil is added into a mold and cured for 7 days with a common concrete curing method, and the formed ecological concrete with low manufacturing cost is obtained.The coastal silty soil with fine particles improves the workability and strength of the concrete.According to the ecological concrete, the coastal silty soil serves as the main ingredient, a small quantity of gelling materials and the additive are added, nearby sea water serves as the mixing water, and thus the material cost is greatly reduced; the ecological concrete can be used for channel and slope protection in coastal enclosing districts to increase the land utilization rate, and can also be widely applied to other coastal and field roadbed construction.

The invention relates to a proposal of a large power underwater constant-pressure power storage station, which comprises an energy conversion device, an electricity generation control device, conduitcables and underwater power storage pin groups. The energy conversion device, under the automatic control of the electricity generation control device, can convert the electricity energy or the renewable energy into the compressed air energy, and then transmit the air energy to the underwater power storage pin groups for storage through the conduit cables; or under the automatic control of the electricity generation control device, the compressed air energy stored in the underwater power storage pin groups can be converted into the electricity energy. The proposal of the invention is characterized in that firstly the surplus electricity at night and various renewable energy sources can be stored in a large amount in the long term; secondly, the outputted air pressure is constant and the energy utilization is complete; thirdly, the storage scale can be large or small, therefore, the power storage station is widely applicable to water areas and occupies less land; fourthly, the construction cost and the maintenance cost are low, the construction period is short while the service life is long; fifthly, the station can automatically shift and float and is not liable to the environmental influence and man-made damage under the water.