# US 2019/0169703 A1 · Glass-making-quality granulated slag process > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0169703 A1 - Document ID: US20190169703A1 - Status: Published application - Kind: A1 - Application number: 16/272,589 - Filed: 2019-02-11 - Published: 2019-06-06 - Earliest claimed: 2015-05-04 - Inventors: Peter Beemsterboer; Simon Beemsterboer; Francis A. Lesters - Web page: https://patentgrep.com/patent/US20190169703A1 ## CPC - C21B 3/08: Cooling slag - C03B 1/00: Preparing the batches (chemical compositions C03C) - C03C 1/002: {Use of waste materials, e.g. slags} - C03C 1/026: {Pelletisation or prereacting of powdered raw materials (apparatus or methods C03B1/02)} - C21B 2200/00: Recycling of non-gaseous waste material - C21B 2300/02: Particular sequence of the process steps - C21B 2400/024: with the direct use of steam or liquid coolants, e.g. water - C21B 2400/04: Specific shape of slag after cooling - C21B 2400/062: Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag - C21B: MANUFACTURE OF IRON OR STEEL (preliminary treatment of ferrous ores or scrap C22B1/00) - C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS ## Abstract A process for forming granulated slag includes collecting a molten slag flow directly from a blast furnace in a temperature range between 2500° F. and 2600° F., quenching the molten slag flow with a flowing spray of water while the molten slag flow is still in the temperature range between 2500° F. and 2600° F. to create a granulated slag flow such that ferrous materials and non-ferrous metallic materials solidify joined together in the granulated slag flow, drying the granulated slag flow, magnetically separating the solidified joined ferrous materials and non-ferrous metallic materials from the granulated slag with a magnet device, and size-screening the granulated slag flow. ## Claims ### Claim 1 A process for forming granulated slag, the process comprising: collecting a molten slag flow directly from a blast furnace in a temperature range between 2500° F. and 2600° F.; quenching the molten slag flow with a flowing spray of water while the molten slag flow is still in the temperature range between 2500° F. and 2600° F. to create a granulated slag flow such that ferrous materials and non-ferrous metallic materials solidify joined together in the granulated slag flow; drying the granulated slag flow; magnetically separating the solidified joined ferrous materials and non-ferrous metallic materials from the granulated slag with a magnet device; and size-screening the granulated slag flow. ### Claim 2 (depends on 1) The process of claim 1, wherein size-screening comprises separating out slag particles smaller than 140 mesh. ### Claim 3 (depends on 2) The process of claim 2, wherein separating out slag particles smaller than 140 mesh comprises filtering out fine slag particles from coolant water used in the quenching. ### Claim 4 (depends on 1) The process of claim 1, wherein size-screening comprises separating out slag particles over ⅜ inches in diameter prior to drying the granulated slag flow. ### Claim 5 (depends on 1) The process of claim 1, wherein size-screening comprises separating out slag particles larger than 24 mesh. ### Claim 6 (depends on 5) The process of claim 5, further comprising: crushing the slag particles larger than 24 mesh; and recycling the crushed particles to the granulated slag flow for the size-screening. ### Claim 7 (depends on 1) The process of claim 1, wherein size-screening comprises separating out slag particles larger than 16 mesh. ### Claim 8 (depends on 1) The process of claim 1, wherein size-screening comprises separating out slag particles smaller than 140 mesh and larger than 24 mesh. ### Claim 9 (depends on 8) The process of claim 8, wherein separating out the slag particles comprises running the slag through at least one vibratory screen device. ### Claim 10 (depends on 9) The process of claim 9, wherein separating out the slag particles comprises running the slag through a plurality of vibratory screen devices, wherein at least one of the plurality of vibratory screen devices comprises agitating balls configured to bounce with the slag particles and facilitate separation of the slag particles from each other. ### Claim 11 (depends on 1) The process of claim 1, wherein the quenching comprises quenching the molten slag flow with a water flow ten times a volume of the molten slag flow, wherein the water flow prior to the quenching has a temperature of not more than 200° F. ### Claim 12 (depends on 1) The process of claim 1, wherein the quenching comprises quenching the molten slag flow with a water flow ten times a volume of the molten slag flow, wherein the water flow prior to the quenching has a temperature of between 150° F. and 170° F. ### Claim 13 (depends on 1) The process of claim 1, further comprising magnetically separating ferrous materials from the granulated slag with a magnet device. ### Claim 14 (depends on 13) The process of claim 13, further comprising providing a cooling flow through the magnet device to prevent the magnet device from overheating. ### Claim 15 (depends on 1) The process of claim 1, further comprising magnetically separating ferrous materials from the granulated slag with a plurality of rare earth drum magnet devices. ### Claim 16 (depends on 1) The process of claim 1, wherein quenching the molten slag flow with the flowing spray of water comprises providing water spray from spray nozzles supplied with 40-60 psi water pressure situated 360 degrees around the molten slag flow. ### Claim 17 (depends on 1) The process of claim 1, wherein quenching the molten slag flow with the flowing spray of water comprises providing water spray from spray nozzles configured in three zones, comprising: a first zone situated below the molten slag flow and configured to spray water upon a bottom of the molten slag flow; a second zone situated above the molten slag flow and configured to spray water upon a top of the molten slag flow; and a third zone situated to both lateral sides of the molten slag flow and configured to spray water upon sides of the molten slag flow. ### Claim 18 (depends on 17) The process of claim 17, wherein the molten slag flow comprises ten tons of slag per minute; wherein the first zone comprises a water flow of 5200 gallons of water per minute; wherein the second zone comprises a water flow of 2600 gallons of water per minute; and wherein the third zone comprises a water flow of 440 gallons of water per minute. ### Claim 19 (depends on 17) The process of claim 17, wherein the molten slag flow comprises ten tons of slag per minute; wherein water nozzles provide water flows totaling at least 8240 gallons of water per minute. ### Claim 20 A process for forming granulated slag, the process comprising: collecting a molten slag flow directly from a blast furnace in a temperature range between 2500° F. and 2600° F.; quenching the molten slag flow with a flowing spray of water while the molten slag flow is still in the temperature range between 2500° F. and 2600° F. to create a granulated slag flow such that ferrous materials and non-ferrous metallic materials solidify joined together in the granulated slag flow, wherein the flowing spray of water comprises a water flow ten times the volume of the molten slag flow; drying the granulated slag flow; magnetically separating the solidified joined ferrous materials and non-ferrous metallic materials from the granulated slag with a rare earth drum magnet; and vibrating the granulated slag flow over size separating screens to separate the granulated slag flow, the vibrating comprising separating out slag particles smaller than 140 mesh and larger than 24 mesh.