13 results about "Pumice" patented technology

It has been unexpectedly discovered that the addition of a natural or other pozzolan to non-spec coal ash significantly improves the properties of the non-spec coal ash to the extent it can be certified under ASTM C618 and AASHTO 295, as either a Class F or Class C coal ash. The natural pozzolan may be a volcanic ejecta, such as pumice or perlite. Other pozzolans may also be used for this beneficiation process. Many pozzolans are experimentally tested and may be used to beneficiate non-spec coal ash into certifiable Class F coal ash. Additionally, this disclosure provides a method of converting a Class C coal ash to a more valuable Class F coal ash. This discovery will extend diminishing Class F coal ash supplies and turn non-spec coal ash waste streams into valuable, certified coal ash pozzolan which will protect and enhance concrete, mortars and grouts.

The utility model relates to the technical field of mining equipment, in particular to a mine pumice stone cleaning device. The device comprises a traction guide device, an equipment box body, a sweeping disc and a plurality of groups of sweeping assemblies, a vertical motor is fixedly mounted in the equipment box body, the traction guide device is fixedly mounted at the top of the equipment box body, and the guide hole and the traction hole are formed in the traction guide device; the output end of the vertical motor is connected with a sweeping disc, and a plurality of sweeping assemblies are fixedly installed on the sweeping disc. The mine slope pumice stone and the unstable loose rock stratum can be cleaned without large mechanical equipment and manpower, the construction efficiency is high, the safety risk is low, the method can be applied to cleaning of all mine slope pumice stones and unstable loose rock stratums, and the application and popularization value is good.

A cement composition is provided including a cementitious matrix containing Portland cement and a volcanic pumice component incorporated within the cementitious matrix. The volcanic pumice component is prepared by grinding in a ball mill using tungsten balls. The ball mill uses a tungsten carbide bowl of capacity 250 ml and the 12 tungsten carbide balls each having a diameter of about 20 mm. The volcanic pumice component is prepared in the ball mill at a speed of about 500 rpm for a duration about 10 minutes, about 1 hour, and about 3 hours. The volcanic pumice component is included in an amount of between about 10% w / w and about 30% w / w.

A cement composition is provided including a cementitious matrix containing Portland cement and a volcanic pumice component incorporated within the cementitious matrix. The volcanic pumice component is prepared by grinding in a ball mill using tungsten balls. The ball mill uses a tungsten carbide bowl of capacity 250 ml and the 12 tungsten carbide balls each having a diameter of about 20 mm. The volcanic pumice component is prepared in the ball mill at a speed of about 500 rpm for a duration about 10 minutes, about 1 hour, and about 3 hours. The volcanic pumice component is included in an amount of between about 10% w / w and about 30% w / w.

A method of manufacturing an activated pozzolan composition includes: (i) grinding a natural pozzolan, alone or with another mineral component that is not cement clinker, to form a finely ground pozzolan component having a first d90 in a range of about 10 μm to about 45 μm and a first d10 less than about 5 μm; and (ii) blending, without intergrinding, the finely ground pozzolan component with a coarse particulate mineral component comprised of coarse mineral particles not interground with the fine interground particulate component, the coarse particulate component having a second d90 greater than the first d90 and a second d10 greater than the first d10. The natural pozzolan can be one or more of natural pozzolanic deposits, volcanic ash, metakaolin, shale dust, calcined clay, trass, and pumice.

The invention comprises a method of sequestering carbon dioxide. The method comprises delivering hyaloclastite, a volcanic glass or pumice to a mill capable of reducing the particle size of the hyaloclastite, a volcanic glass or pumice; processing the hyaloclastite, a volcanic glass or pumice in the mill so that the processed hyaloclastite, a volcanic glass or pumice has a volume-based mean particle size of less than or equal to 40 μm; and exposing the hyaloclastite, a volcanic glass or pumice to carbon dioxide in gaseous, liquid or solid form during or after the particle reduction process.

The invention relates to the technical field of tunnel model tests, in particular to a soil surrounding rock similar characteristic material for a simulation experiment and a preparation method, and the similar material comprises the following raw materials by weight: 20-25 parts of sand, 5-10 parts of gypsum, 10-15 parts of fly ash, 2-4 parts of bryozoatum, 1-3 parts of expanded perlite, 0.5-2 parts of glass short fiber, 0.5-2 parts of a water reducer and 4-6 parts of water. The method meets the similarity requirements of key parameters such as weight, elasticity modulus, Poisson's ratio and compressive strength to truly simulate the mechanical response of surrounding rock under fault activity, and has the characteristics of simple preparation process, low cost, high operability and the like, so that the reliability and practicability of a model test are improved.

The invention comprises a product. The product comprises a carbonation aid or a microporous material and basaltic hyaloclastite or intermediate basaltic hyaloclastite, wherein the carbonation aid facilitates the conversion of one or more of CaO, MgO, Na2O, K2O or FeO to a carbonate or a CO3 containing mineral in the presence of CO2 and wherein one or more of the carbonation aid, the microporous material, the basaltic hyaloclastite or intermediate basaltic hyaloclastite have carbon dioxide bound thereto at a concentration greater than its atmospheric concentration.

A ZnO-pumice passive photocatalyst is fabricated by coating ZnO nanoparticles on a volcanic rock material called pumice, to form a strongly bonded composite substance that can be applied in solar- activated photocatalytic treatment of wastewaters. The composite is produced through an easily reproducible coating method that gives a solid long-lasting composite material.

The invention comprises a method of making a mineral plant nutrient. The method comprises screening or reducing in size basaltic hyaloclastite or intermediate basaltic hyaloclastite to a powder form having volume-based mean particle size of less than or equal to 100 μm; and combining the basaltic hyaloclastite or intermediate hyaloclastite powder with soil. The plant nutrients are absorbed by the crop and the carbonatable minerals released from the hyaloclastite react with CO2 from the ground and air. Elements weathered into the separate plant nutrients and carbonatable elements. Plant nutrients such as K, P, S, B, Co, Cu, Fe, Mo, Zn and Ni are used by the crop plants as nutrients. Carbonatable elements such as Ca, Mg, K, Na and Fe react with CO2 from the hyaloclastite, in the ground and the air to create simple or complex carbonated mineral, thereby mineralizing CO2 Optionally, the hyaloclastite can be substituted with lava, scoria, volcanic ash or pumice containing carbonatable elements that when dissolved in soil can react with CO2 and create simple or complex carbonate minerals thereby mineralizing or sequestrating CO2

An insulating material comprising a porous material selected from the group consisting of expanded pearlite, vermiculite, pumice stone and expanded glass beads, modified with silica aerogel, wherein the silica aerogel is embedded within pores of the porous material.

The present invention relates to a hybrid filter unit (2) comprising a housing (4) having an inlet (6) for the inflow of a fluid to be purified and an outlet (8) for the outflow of the purified fluid. The hybrid filter unit (2) further comprises a wall structure (16) disposed inside the housing that defines a fluid mixing chamber (18), the wall structure defining an internal cross-sectional area that decreases at least partially in the direction from the inlet (6) to the outlet (8). The hybrid filter unit (2) further comprises a nozzle (14) disposed to supply an oxidizer to the mixing chamber (18), thereby exposing the fluid to the oxidizer as it flows between the inlet and the outlet and allowing it to react with the oxidizer. The hybrid filter unit (2) further comprises a filtration structure (74) disposed between the inner wall surface of the housing and the outer wall surface of the wall structure, the filtration structure comprising volcanic pumice (78), and the wall structure (16) is at least partially adapted to the flow of fluid from the mixing chamber (18) to the filtration structure (74).

The invention comprises a method of making a mineral plant nutrient. The method comprises screening or reducing in size basaltic hyaloclastite or intermediate basaltic hyaloclastite to a powder form having volume-based mean particle size of less than or equal to 100 μm; and combining the basaltic hyaloclastite or intermediate hyaloclastite powder with soil. The plant nutrients are absorbed by the crop and the carbonatable minerals released from the hyaloclastite react with CO2 from the ground and air. Elements weathered into the separate plant nutrients and carbonatable elements. Plant nutrients such as K, P, S, B, Co, Cu, Fe, Mo, Zn and Ni are used by the crop plants as nutrients. Carbonatable elements such as Ca, Mg, K, Na and Fe react with CO2 from the hyaloclastite, in the ground and the air to create simple or complex carbonated mineral, thereby mineralizing CO2 Optionally, the hyaloclastite can be substituted with lava, scoria, volcanic ash or pumice containing carbonatable elements that when dissolved in soil can react with CO2 and create simple or complex carbonate minerals thereby mineralizing or sequestrating CO2.