4results about How to "Improve grindability" patented technology

This invention relates to a method for modifying molten steel slag with carbon dioxide throughout the entire process under normal pressure. The method includes: first, adding the first batch of steel slag to a slag pot for melting; then, adding 10%–35% of the mass of the first batch of hot molten steel slag as a steel slag fracturing agent to the slag pot; next, unloading a second batch of hot molten steel slag into the slag pot through a slag discharge device of a converter or continuous casting system; then, adding a second batch of hot molten steel slag as a steel slag fracturing agent to the slag pot, repeating this cycle until the slag pot is full. This method achieves complete dissociation and efficient separation of the molten steel slag by adding modified steel slag tailings and steel slag fracturing agent in layers into the slag pot, utilizing the phased and temperature-segmented release of carbon dioxide by the fracturing agent. This completely solves the problems of iron-rich casting residue, desulfurization slag welding pot, and agglomeration. This method can be combined with the phased supply of solid carbon dioxide to synergistically improve the strength of the steel slag. The residue after supply can be utilized as a resource, making it environmentally friendly and efficient.

The utility model provides a coal coke membrane which adopts coal coke and biomass charcoal as main raw materials, is prepared through pyrolysis and forming processes, and has a porous structure and efficient liquid filtering performance. And the mass ratio of the coal coke to the biomass charcoal can be regulated and controlled so as to optimize the pore size distribution and the filtering efficiency. The membrane is doped with a non-metallic mineral material so as to enhance the adsorption capacity and the separation efficiency. The membrane exhibits an impurity removal rate of at least 90% when treating cotton spinning waste liquid. The preparation process comprises the steps of raw material mixing, binder adding, pyrolysis treatment, cooling smashing and forming. The coal coke membrane has high stability, selectivity, permeability and mechanical strength, provides an efficient and stable novel membrane material for industrial wastewater treatment, and has a remarkable application prospect.

The invention belongs to the technical field of biomass energy and resource utilization pretreatment, and particularly relates to a biomass high-temperature anti-explosion grinding system and a grinding technology.The biomass high-temperature anti-explosion grinding system comprises a grinding machine, a feeding port is formed in the grinding machine, a discharging port is formed in the top of the grinding machine, and the discharging port conveys materials to a cyclone separator through a powder discharging fan to be separated and collected; a cyclone separator is arranged at the top of the pulverizer, an adjusting gas path is further arranged at the bottom of the pulverizer, the gas inlet end of the adjusting gas path is communicated with the top of the cyclone separator, and an air blower is further arranged on the adjusting gas path. Smoke with the oxygen content lower than 1% serves as an airflow carrier, biomass is pulverized at the temperature of 150-200 DEG C, the pulverizing efficiency is improved, and the grindability of the biomass is improved.

A method for synergistically preparing green Portland cement clinker by utilizing multi-element solid waste comprises the following steps: (1) obtaining raw materials of limestone, silica, phosphorite beneficiation powder, copper tailings, ferroalloy slag and coal-fired slag, burdening according to silicate, and mixing and grinding to obtain a raw material; (2) preheating the obtained raw material by a preheater, and then feeding the raw material into a decomposing furnace for decomposing; (3) calcining in a rotary kiln after decomposition to obtain green Portland cement clinker; the method has the beneficial effects that 1, the copper tailings are doped, so that the burnability of the raw material is improved, and the cost of the raw material is reduced; 2, the content of f-CaO in the clinker can be reduced, the compressive strength, compactness, water resistance and stability of the clinker can be improved, the quality of the clinker is improved, and the coal consumption of clinker sintering is reduced; thirdly, after the copper tailings are used for replacing a part of ferroalloy slag, the content of water-soluble hexavalent chromium in the cement is reduced; and 4, by doping the coal-fired slag, the grindability of the raw material can be improved, the quality of the clinker is improved, the coal consumption of clinker sintering is reduced, and the cost is reduced.