The present invention relates to a heating cooker using a ceramic heating element and a manufacturing method thereof, the method comprising: a cooker body preparation step; a heating element material preparation step of preparing any one or more selected from among mill scale, steelmaking slag and magnetite (Fe.sub.3O.sub.4); an inorganic binder preparation step of preparing, as an inorganic binder, a colloidal silica sol having a colloidal silica content of 8 to 30 wt %; a mixing step of mixing 20 to 40 parts by weight of the colloidal silica sol as the inorganic binder with 100 parts by weight of the heating element material, thereby making a heating material paste; an application step of applying the heating element paste to the bottom of the cooker body; and a drying and curing step of drying and curing the heating element paste, thereby forming a solid heating element.

The present invention relates to a process for producing calcium silicate hydrate under hydrothermal conditions, wherein an organic compound is added in at least one of the process steps and wherein the organic compound has a molecular weight of 100 to 600 g/mol and from 0.02 to 0.035 functional groups per gram of the organic compound, wherein the functional groups being selected from —OH, —COOH, 'COOM.sub.a, —SO.sub.3H or —SO.sub.3M.sub.a, or —C(═O)H, wherein M is hydrogen, a mono-, di- or trivalent metal cation, ammonium ion or an organic amine radical and a is ⅓, ½ or 1. Further the invention is directed to the calcium silicate hydrate produceable according to the process of the present invention and its use as curing accelerator for hydraulic binders.

A process for preparing a granular ceramic mixture includes the steps of: (a) contacting fluid bed combustion fly ash with an acidic aqueous solution to obtain acidic fluid bed combustion fly ash slurry; (b) removing excess acid from the slurry obtained in step (a) to obtain solid acid treated fluid bed combustion fly ash; and (c) contacting together: (i) the solid acid treated fluid bed combustion fly ash obtained in step (b); (ii) clay; (iii) optionally, feldspar; and (iv) optionally, other ingredients.

A recycled aluminium silicate material, suitable for use in ceramic article production, wherein the recycled aluminium silicate material has a particle size distribution such that: (i) the d.sub.50 particle size is from 10 μm to 30 μm; (ii) the d.sub.70 particle size is less than 40 μm; and (iii) the d.sub.98 particle size is less than 60 μm. A particulate mixture, suitable for use in ceramic article production, includes the above defined recycled aluminium silicate material.

This invention provides a de-molding system of ceramic parts manufactured by freeze-casting comprising a mold (9), wherein the mold (9) comprises an upper opening (95) and a lower opening (94), wherein the upper opening (95) is adapted to receive a colloidal suspension (92), and one of the openings is adapted to allow the passage of a manufactured ceramic part (92), characterized by comprising at least one main de-molding element (80) adapted to actuate a ceramic part manufactured (92) through an opening in the mold (9). In addition, the invention provides a mold cooling system for the manufacturing of ceramic parts by freeze-casting comprising: a source (1) of cooling gas; a cooling gas cooling medium (7) fluidically connected to the cooling gas source (1); and a cooling cell (5), fluidly connected to the cooling gas cooling medium (7), comprising a mold (9) in its interior, wherein the cooling cell (5) comprises a refrigerated cooling gas injection opening. Thus, a mold cooling system is provided for the manufacturing of ceramic parts by freeze-casting comprising the stages of: refrigerating a cooling gas coming from a cooling gas source (1); and injecting a cooling gas that is refrigerated in a cooling cell (5) comprising a mold (9) in its interior.

A synergistic disposal method of hazardous waste incineration residues and solid wastes, ceramsite and an application thereof, all belonging to the field of resources and environment. The disposal method includes the following steps: mixing of the hazardous waste incineration residues and solid wastes, granulation and dehydration of the resulting mixture and calcination to obtain ceramsite. In the preparation of ceramsite by the synergistic disposal of hazardous waste incineration residues and solid wastes as the raw materials, dioxin and organic matters in the hazardous waste incineration residues and solid wastes are decomposed, meanwhile the contained heavy metals are reduced and solidified, solving the disposal problem of hazardous waste incineration residues and solid wastes, saving a lot of land for landfills, decreasing the cost for comprehensive disposal, not producing new hazardous wastes, and reducing the burden of ecological environment.

Materials that seamlessly transition from opaque to transparent or translucent, such as advanced geopolymer-based ceramics to glass structures, which can be directly and seamlessly bonded without the use of an intermediate adhesive or use of a frame are disclosed. That is, a GP-based ceramic to glass structure can be bonded directly and seamlessly and without any mechanical joints, connective tissue or adhesives such as caulking or epoxy. Such ceramic to glass materials can be prepared by sintering an engineered geopolymer with glass to form the geopolymer-based advanced ceramic-glass structure in which the interface is visually abruptly or in which the material is a graded composition with a controlled transition from one material to the other.

The present disclosure relates to the manufacture of ceramic products by aqueous gelcasting. Exemplary ceramic products include sanitary ware, such as toilets and sinks. The process includes a slurrying step, a mixing step, a molding step involving aqueous gelcasting, a drying step, a glazing step, and a firing step.

The present disclosure relates to the manufacture of ceramic products by aqueous gelcasting. Exemplary ceramic products include sanitary ware, such as toilets and sinks. The process includes a slurrying step, a mixing step, a molding step involving aqueous gelcasting, a drying step, a glazing step, and a firing step.

The invention discloses a method of making waterproof magnesium oxychloride refractory brick using fly ash from municipal solid waste incineration (MSWFA). The solidification and stabilization of heavy metals in MSWFA is achieved by the chemical action of a sulfur-containing compound and a physical wrapping of a geopolymer. The large amount of chloride ions in MSWFA is also reused in the manufacture of magnesium oxychloride refractory brick, which requires a high chlorine environment. This method, with the inclusion of the geopolymer, also produces refractory brick exhibiting improved water resistance relative to traditional magnesium oxychloride refractory brick, thereby allowing the improved magnesium oxychloride refractory brick to be used in a wider range of applications.