8 results about "Dealkalization" patented technology

This invention discloses a lithium slag dealkalization treatment agent and a method for the resource utilization of lithium slag in building materials, comprising the following raw materials in parts by weight: 50-80 parts sodium hydroxide, 30-50 parts water glass, 5-15 parts polycarboxylate superplasticizer, and 10-20 parts calcium carbonate. This invention has the advantage of being environmentally friendly and solves the problems of existing lithium slag resource utilization methods, such as the inconvenience of preparing high-strength, high-insulation building materials from waste lithium slag, insufficient strength of lithium slag building materials making them unsuitable for load-bearing structures or high-load scenarios, limiting their use to low-strength filler materials or non-structural components, significantly reducing their economic value, and poor insulation performance failing to meet energy-saving building standards, resulting in a lack of competitiveness in scenarios requiring thermal insulation such as walls or roofs.

The application discloses a kind of red mud gradient depth purification-rare earth-radioactivity synergistic target purification method, by " hierarchical pretreatment and microwave modification→three-stage gradient dealkalization→rare earth-radioactivity synergistic target purification→full quantization recycling" four-stage integrated process, realize red mud harmless and high-value utilization.The three-stage gradient dealkalization uses microwave-CO2-biological synergic system, after dealkalization pH≤8.0, Na2O content<1%;Rare earth-radioactivity purification is extracted by HDES and coupled with multi-ligand magnetic material system, light rare earth recovery rate≥95%, middle heavy / rare earth recovery rate≥90%, U / Th removal rate≥95%;Full quantization recycling realizes red mud total utilization rate≥98.5%, wastewater reuse rate≥95%, every ton of red mud fixed CO2≥0.2 tons.The application is suitable for various high-alkali, containing radioactive and rare earth red mud treatment, with environmental benefits and economic benefits.

The present application relates to the technical field of comprehensive utilization of solid waste, and particularly relates to an aluminum-silicon solid waste dealkalization and resource system based on lattice distortion, comprising: a dealkalization control module, comprising a pulping unit for converting aluminum-silicon solid waste into a permeable system; a resource recovery module, comprising a separation unit for separating dealkalized solid phase from alkali-containing liquid phase after dealkalization; a dealkalization determination module for determining whether the dealkalization completeness of aluminum-silicon solid waste meets the requirements according to the dealkalization completion rate; a variable pressure mechanism construction module for determining whether to construct a structure disturbance mechanism and determining the alternating pressure difference amplitude according to the alkali metal ion concentration in the leaching solution of the dealkalized solid phase; and a dealkalization environment adjustment module for determining whether to add a low-concentration weak acid solution according to the net release rate of alkali metal ions in the dealkalization process. The present application improves the dealkalization completeness of aluminum-silicon solid waste.

The utility model relates to the technical field of dust ash treatment, especially to a high-zinc dust ash dealkalization zinc enrichment treatment device, when using, granular dust ash is poured into the box and is carried out the crushing operation to the dust ash through the crushing assembly, the dust ash after crushing enters the inside of the box, the inside of the box is provided with the pickling solution and carries out the dealkalization assembly to the dust ash, after the operation is finished, the dust ash solution enters the centrifuge and carries out the solid -liquid separation, improves the processing efficiency, including bottom plate, centrifuge and box, the bottom plate top end is installed with centrifuge and box, still includes crushing assembly and dealkalization assembly, the inside of box is installed with crushing assembly and dealkalization assembly, the dealkalization assembly is linked with centrifuge input end.

The application relates to the technical field of building materials, in particular to an early-strength Belite sulphoaluminate cement clinker and a preparation method thereof, which comprises the following steps: uniformly mixing a mixture of dealkalization red mud and carbide slag, aluminum slag, phosphogypsum, magnesium slag and a modified composite mineralizer, grinding to obtain cement raw material, gradient calcining the cement raw material to obtain clinker, and rapidly cooling the clinker to room temperature through liquid nitrogen to obtain the early-strength Belite sulphoaluminate cement clinker. The modified composite mineralizer with a core-shell structure can uniformly disperse and continuously and stably release active components in calcination, effectively reduces the clinker sintering temperature and liquid phase formation temperature, reduces energy consumption, the mineralizer can promote the full formation and uniform distribution of calcium sulphoaluminate, Belite and other high-strength minerals, inhibit the formation of harmful phases and composition segregation, improve the overall cementitious activity of the clinker, and the core-shell structure can protect the active components from being consumed in advance, and ensure that the active components continuously play a role at high temperatures.

The application provides a red mud-based artificial soil and a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing red mud, a calcium source and a sodium aluminate solution to obtain a raw slurry; (2) performing a first hydrothermal reaction on the obtained raw slurry to prepare a first clinker slurry, and obtaining a dealkalized red mud after first solid-liquid separation; (3) mixing the dealkalized red mud, detoxified fly ash and water to perform a second hydrothermal reaction, and obtaining a second clinker slurry; (4) sequentially performing second solid-liquid separation and washing on the obtained second clinker slurry to obtain a soil matrix; and (5) mixing the obtained soil matrix with organic matter and culturing to obtain the red mud-based artificial soil. The first hydrothermal reaction is used for dealkalizing the red mud and recovering alkali, the second hydrothermal reaction is used for solidifying active alkali in the red mud, then the introduction of organic matter increases the content of effective nutrients in the artificial soil and forms a granular structure, and finally the red mud-based artificial soil with good performance is prepared.