Abstract:
A stable aqueous suspension of water-soluble polyacrylamide particles is in a saturated solution of an ammonium salt. The polyacrylamide particles are characterized by a particle size of about −150 mesh, and preferably −270 mesh, with −400 mesh most preferred. The suspension is at least about 2.5% by weight polyacrylamide. When the ammonium salt is ammonium sulfate, PAM concentrations as high as about 15% by weight can be achieved while still being easily flowable. The suspension is made by stirring the small particle PAM into the saturated ammonium salt solution. The PAM can be quickly dissolved to form a less concentrated PAM solution by adding the suspension to water or to a dilute solution, which can include calcium salts or other soil enhancers.
Abstract:
The invention provides methods of disintegrating or reducing the particle size of elemental materials, such as various forms of carbon, and organic crystals that contain minerals and that do not contain minerals. The method include the steps of entraining the material in a gas flow through an inlet of a housing, subjecting the flowing material to a plurality of alternating pressure increases and decreases within the housing, disintegrating the flowing material with the pressure increases and decreases, thereby reducing the mean particle size of the material, and discharging the disintegrated material though an outlet of the housing.
Abstract:
The invention relates to recycling wornout tyres and other industrial and domestic wastes. According to a method for shredding wornout tyres a package of wornout tyres is formed as a number of closely compacted layers. The package is subjected to primary destruction in an armored chamber under conditions of free extension until the package outside layers are destroyed. The overall dimensions of the armored chamber in any cross-section thereof square with the chamber axis and passing through the package of the compacted tyres varies within the range of from 2 to 7 package diameters in such section. The compact package of tyres is formed from a few coaxial helical twists having an axial hole. According to the invention, a stress-strain state is established upon free extension of a rubber layer without its contacting with the walls of the armored chamber, whereby efficient destruction and disintegration of the rubber, metallic and textile cord of a tyre is attained.
Abstract:
Rubber chips are immersed in a coolant to cool the chips to a the temperature in the range of −90 degrees to −110 degrees Celsius. The coolant contains alcohol such as n-butyl alcohol, methanol, pentane and is cooled by nitrogen. The cooled chips are then comminuted to a powder in the range of 10 mesh to 100 mesh ASTM in size.
Abstract:
The mobile tire cruncher utilizes a trailer to support a hydraulic press punch and removable die. The press punch and die cooperate with one another to form small chips from used tires. The die is removable so that any shaped chip may be made by using a die with that shape openings. The trailer has wheels so that the trailer may be transported to the site of the used tires. The press punch is powered by a hydraulic cylinder and the trailer supports a power unit for causing movement of the press punch. Hydraulic stabilizers extend from the trailer to support the tire cruncher during use.
Abstract:
The invention provides methods of disintegrating or reducing the particle size of elemental materials, such as various forms of carbon, and organic crystals that contain minerals and that do not contain minerals. The method include the steps of entraining the material in a gas flow through an inlet of a housing, subjecting the flowing material to a plurality of alternating pressure increases and decreases within the housing, disintegrating the flowing material with the pressure increases and decreases, thereby reducing the mean particle size of the material, and discharging the disintegrated material though an outlet of the housing.
Abstract:
A method of producing an aqueous solution of water-soluble polyacrylamide (PAM) with a concentration of at least about 5 grams per liter includes the steps of providing a monovalent or divalent cation salt solution, and preferably a calcium salt solution, and adding water-soluble PAM particles to the salt solution such that the PAM particles are essentially all dissolved within about 10 seconds. The PAM particles are characterized by a particle size that is about −100 mesh and consisting essentially of molecules having a molecular weigtht of at least about 15 million a.u. Preferably, the small PAM particles are produced by a mill that produces bulk quantities of small dry, flowable PAM particles from larger commercial grade particles. Small PAM particles produced in such a mill are essentially all soluble in plain water within about 10 seconds. After solution, the polymer concentrate can be diluted with water to make stock solutions of the polymer for some purposes. For other purposes the concentrate can be injected directly into irrigation systems. Effectiveness of the water-soluble polyacrylamide as a soil conditioner is considerably increased by co-use with a calcium salt, gypsum, fertilizer salts, or a combination of these salts, in addition to the increased ease of making solutions.
Abstract:
An apparatus for fine grinding material, such as waste automotive tires. The apparatus includes first and second plates mounted within a housing. The first and second plates include respective, opposed inclined surfaces and respective pluralities of generally radially extending cutting elements. Each of the generally radially extending cutting elements define a serrated edge extending above the corresponding inclined surface. The serrated edges on the first and second plates intermesh with one another while the opposed inclined surfaces define a grinding space therebetween that gradually becomes more narrow in a radially outward direction. One of the plates is mounted for rotation and a drive is operatively coupled with the one plate for rotating that plate during a grinding operation.
Abstract:
An apparatus pulverizes material composed of wet or dry discrete objects into relatively smaller particles with shock waves created by flowing the material through a housing having alternating rotors and orifice plates. The housing includes a first end having a feed chute for introducing the material into the housing, a second end having an opening for removing the smaller particles, and internal sides meeting in corners, which extend longitudinally between the first and second ends. A rotatable shaft extends substantially along a longitudinal central axis of the housing. Rotors each include a hub coupled to the shaft for rotation therewith, a substantially polygonal-shaped rotor plate centrally fixed to the hub and having apices, and a plurality of vanes each vanes extending approximately radially inward on a side of the rotor plate from an apex. Each orifice plate extends inwardly from the internal sides of the housing to a central aperture which provides an orifice around the shaft. Circumferentially spaced members are located proximate the rotors, wherein the members extend inwardly from the corners of the housing toward the rotors.
Abstract:
A tire shredding machine which does not require the massive amount of machinery required for existing tire shredders and which is safe and simple to use is disclosed. The tire shredding machine of the present invention essentially includes a housing with a safety hood, several wheels, and guide elements or wings. In order to shred a tire, the tire is cut in half and each half is fed into the machine one at a time. The safety hood remains in an open position until the tire is fed into the machine. Once the tire is in the machine, the hood is placed into a closed position, a switch is activated, and the wheels pull the half of the tire into the machine. The tire contacts the guide elements which, in turn, spread out or flatten the tire so that the tire may be fed into a grinder which shreds the tire.