64results about How to "Obvious benefits of energy saving and emission reduction" patented technology

The invention discloses a method for converting metal magnesium smelting and reducing slag into a desulphurizer for a coal-fired boiler. The system mainly comprises a drum-type air-water cooled crusher, an airtight water cooled buried scraper conveyor, an airtight vibrating screen classifier, an airtight bucket elevator, a magnesium slag powder storehouse, a bag-type dust collector, a draught fan and the like, and a pipeline connecting system. The waste slag by smelting the metal magnesium is treated to become the desulphurizer used by a circulating fluidized bed boiler, and the recovery and reuse of the waste are realized. The process method has the advantages of economy, energy conservation and emission reduction: a metal magnesium smelting unit converts the wastes into commodities, and the air pollution and soil pollution are removed and the residual-heat utilization is realized. In addition, the cheap desulphurizer can be provided for fluidized bed boilers in electric power plants. The method belongs to the field of treatment for solid wastes and is applied to the waste residue treatment and utilization of the metal magnesium smelting unit by the thermal reduction method.

The invention discloses a low-carbon high-performance concrete supplementary cementitious material which is prepared from 20-70 parts of slag, 20-70 parts of coal ash, 5-10 parts of silica fume, 3-10 parts of desulfurized gypsum and 1-3 parts of water reducing agent by weight to form an admixture, wherein the slag, the coal ash, the silica fume and the desulfurized gypsum are micro aggregates of 100 nanometers to 100 microns; and the materials are sequentially placed in a mixer and stirred for 60-120 minutes at a speed of 60-120 rpm at normal temperature under normal pressure to obtain the supplementary cementitious material. The low-carbon high-performance concrete supplementary cementitious material disclosed by the invention can replace 70% of cement in concrete when applied to concrete; and even if the 70% of cement is replaced, the strength of the prepared concrete also can reach C15-C60. The low-carbon high-performance concrete supplementary cementitious material is suitable to be used as a building material and also has special purposes of back-fill grouting, toxic waste solidification and the like.

The invention discloses a self-compacting mortar combination and a preparation method thereof. The self-compacting mortar combination comprises the following components by weight parts: 0.52-0.94 part of water, 1 part of cement, 0-0.55 parts of fly ash, 2.83-4.89 parts of sand, and 0.01-0.03 parts of additive, wherein the additive is composed of the following components by weight parts: 1 part ofmelamine, 0.2-0.6 parts of polyacrylamide high performance anti-washout agent, 0.1-0.5 parts of UWB-II type underwater anti-washout agent, and 0.05-0.15 parts of flocculating agent. The preparation method comprises the following steps: feeding the additive into a container based on the order and ratio of each component, stirring, and then adding each component of the self-compacting mortar into the container according to the ratio, and stirring. The self-compacting mortar of the invention is adaptable to different geological conditions, in this way, the comprehensive cost is greatly reduced, the usage of cement is greatly decreased, stirring time is shortened by about 20% than that for normal mortar, the clearance of broken zones is compactly filled without vibration, the mortar does not separate or bleed water even at the diffusance of 600 mm, the viscosity is good, the mortar can be used in deep hole curtain grouting in the presence of groundwater, and the grouting effect is good.