3results about How to "High fixed carbon content" patented technology

A waterproof, highly durable, and high density biochar particle is described. In some variations, a method of making biochar particles includes pyrolyzing a biomass-containing feedstock in a pyrolysis reactor, thereby producing a biochar-containing solid material and a pyrolysis vapor; introducing the pyrolysis vapor into a separation system configured to recover the pyrolysis condensate in liquid form separated from the non-condensable gas; capturing the pyrolysis condensate as a polyphenol material; contacting the solid material containing biological carbon with a polyphenol material to generate an intermediate mixture; introducing the intermediate mixture into a densification unit, thereby producing a biochar particle precursor; and subjecting the biochar particle precursor to at least partial drying, thereby producing biochar particles characterized by a 24-hour water absorption of about 20 wt% or less as measured at 25 DEG C and 1 bar. The biochar particles can be stacked outdoors, which has logistics convenience at a manufacturing site, such as an industrial metal smelting plant in which the biochar particles are fed in a process.

The application discloses a method for preparing direct reduced iron from iron-containing raw materials with near-zero carbon, and belongs to the technical field of steel metallurgy. The method comprises the following steps: uniformly mixing iron-containing raw materials, an organic-inorganic composite binder, biomass carbon and water, and then sequentially performing high-pressure forming and drying and solidification to obtain cold briquetting; and the cold briquetting is reduced by pure hydrogen to obtain direct reduced iron. The method can prepare cold briquetting suitable for the performance requirements of a shaft furnace for direct reduction at a relatively low temperature (<300 DEG C), and further prepares direct reduced iron by pure hydrogen reduction. The method has a short process flow, near-zero carbon emission, and provides a new technical route for the green and low-carbon transformation of the steel industry.

The invention relates to the technical field of dry quenching dust removal, in particular to an automatic ash discharge device of a dry quenching primary dust removal and secondary dust removal system, a use method and an activated carbon preparation method, the device comprises a primary dust removal system, a primary dust removal buffer bin, an activation furnace, a secondary dust removal system and a controller; the output end of the primary dust removal system is communicated with the input end of the primary dust removal buffer bin, the output end of the primary dust removal buffer bin is communicated with the activation furnace through a double-layer valve, and the output end of the primary dust removal buffer bin is further provided with a second material level detector; the output end of the secondary dust removal system is communicated with the input end of the primary dust removal buffer bin through a pipe body, a valve is arranged on the pipe body, and a first material level detector is arranged at the output end of the secondary dust removal system; and the controller is respectively connected with the first material level detector, the second material level detector, the valve and the double-layer valve. The dedusting ash of the primary dedusting system and the secondary dedusting system is activated.