4results about How to "Long process" patented technology

The invention belongs to the technical field of crossing of building materials and phase-change energy storage materials, and particularly relates to ardealite phase-change ceramsite and a preparation method thereof.The ardealite phase-change ceramsite is prepared from, by weight, 45-50 parts of ardealite, 18-22 parts of S95 mineral powder, 7-10 parts of cement clinker, 3-5 parts of glass beads and 20-25 parts of phase-change materials. The preparation method comprises the six steps of raw material preparation, material mixing and stirring, pelletizing and forming, maintenance treatment, drying and consolidation and the like. According to the method, waste recycling application is achieved through material proportion optimization and a cold bonding process, and the method is suitable for the fields of building energy saving, environment-friendly product manufacturing and the like. The technical problems that in the prior art, when phase-change ceramsite is prepared from phosphogypsum, a phosphogypsum-based porous material needs to be prepared firstly, then a phase-change material needs to be packaged, the cylinder compressive strength is low, the water absorption rate is too high, and then the bearing capacity and the heat preservation performance are reduced are solved.

This invention belongs to the field of aluminum-based composite material preparation technology, and relates to a continuous casting and rolling method for preparing aluminum-based composite material strips. The method involves preparing a reinforcing preform with a thickness not exceeding the roll gap distance in the aluminum-based composite material strip. Before preparing the aluminum-based composite material strip, the casting rolls are water-cooled and run at a set speed. Molten aluminum is injected into the molten pool, and the liquid level is controlled to a set value. Throughout the preparation process, the molten pool liquid level is maintained at the set value. The molten aluminum cools and solidifies upon contact with the roll surface of the casting rolls. Under the casting action of the two casting rolls, an aluminum alloy strip is formed and continuously output from the lower end of the roll gap. During the preparation process, the reinforcing preform moves from top to bottom at a set speed and is immersed in the molten aluminum pool. The molten aluminum penetrates into and fills the interior of the reinforcing preform. The reinforced preform, filled with molten aluminum, gradually solidifies as it moves to the roll gap until it is completely solidified. Then, under the casting force of the two casting rolls, it undergoes rolling deformation to form the aluminum-based composite material strip.

This utility model discloses a treatment system for recovering industrial-grade sodium chromate from chromium-containing electroplating wastewater. The system is sequentially connected to a pretreatment system, an ion exchange system, an evaporation and concentration system, a purification system, and an evaporation and crystallization system. The pretreatment system removes suspended solids. The ion exchange system contains at least four ion exchange columns and an eluent tank; the coordinated operation of multiple columns ensures sufficient adsorption and elution of chromium, increasing the concentration of hexavalent chromium in the eluent, reducing the load on subsequent evaporation equipment, and shortening processing time. The evaporation and concentration system uses an MVR evaporator and integrates an online density meter. The purification system is equipped with a purification reaction vessel with a detachable pH meter probe, which can quantitatively remove sulfate, reducing the difficulty of salt separation and crystallization, increasing the number of mother liquor circulations, and thus improving the chromium recovery rate. The feed to the eluent tank allows for reasonable adjustment of the alkali dosage according to different concentrations of components, avoiding waste and reducing costs. The detachable pH meter probe facilitates maintenance, ensures accurate monitoring, and improves the stability of sulfate removal rate and the quality of sodium chromate products.