grate furnace kiln taconite

Engineered Design of Fiber Reinforced Precast Refractory ...

(4) The NO X reduction control technology shall be installed on United Taconite Grate Kiln Line 1 furnace no later than 26 months from May 12, 2016. (5) Commencing on the earlier of: Six months from the installation of the NO X reduction control technology or 26 months from May 12, 2016, the owner or operator must provide to EPA the results ...

KOBELCO Pelletizing Process

Taconite, a low grade iron ore of approximately 30% iron content or lower, is mined (by open-pit ... There are three different furnace types: a) grate-kiln, which consists of a traveling grate, a rotary kiln, and an annular cooler; b) straight grate; and c) vertical-shaft, which handles a …

Mathematical model of magnetite oxidation in a rotary kiln ...

The grate-kiln taconite pellet induration system involves several stages of heat and oxygen transfer to a traveling bed of spherical taconite pellets, as shown in Figure 1. At the heart of the process is the rotary kiln where pellets are heated to temperatures in excess of 1600 K with a high temperature flame.

KOBELCO Pelletizing Process

The Grate, the Kiln and the Cooler. The object of the process is to transform the pelletized concentrate into hardened pellets that can be used as blast furnace feed or direct reduction furnace feed. The Travelling Grate is where pellets are dried and then heated up to a temperature of about 800-900 deg C.

US3539336A - Ore pelletizing process and apparatus ...

Dec 18, 2002· During the indurating process, the unfired taconite pellets are hardened and oxidized in the indurating furnace at a fusion temperature between 2,290 to 2,550 °F. Two types of indurating furnaces are currently used within this source category: straight grate furnaces and grate kiln furnaces.

Mercury Transport in Taconite Processing Facilities: (III ...

Grate kiln system for iron ore pelletizing - .com ... i.e. strap type roasting furnace, grate-kiln-cooler pelletizing process and shaft furnace pelletizing... Read more. Simulator provides multiple benefits for LKAB - Abb ... Pelletization is the third major step in taconite ore processing. Iron ore ... grate/kiln product must be cooled in a ...

40 CFR § 52.1235 - Regional haze. | CFR | US Law | LII ...

Taconite Industry Products and By-products: An Investigation of Alternative Uses and Their Economic Potential .....64 Up-Grade CFD Cooler Models for Grate-Kiln Systems, and Perform Cooler Evaluation of Cooler Speed/Bed Depth on

Federal Register :: National Emission Standards for ...

Grate feed means the transfer of unfired taconite pellets from the pelletizer into the indurating furnace. Grate kiln indurating furnace means a furnace system that consists of a traveling grate, a rotary kiln, and an annular cooler.

CONTRIBUTIONS TO THE TECHNOLOGY COMPARISON …

C indurating using a vertical shaft furnace, straight grate, or grate/kiln, and material handling (transfer, pellet cooling) of the indurated pellets. The economic effects of the rule are conditional on the technology for producing taconite iron ore and their costs of production; the value of the taconite …

Meeting of the Iron Range Resources and Rehabilitation Board

2/97 Taconite Ore Processing 11.23-6 The grate/kiln apparatus consists of a continuous traveling grate followed by a rotary kiln. The grate/kiln product must be cooled in a separate cooler, usually an annular cooler with counter current airflow. 11.23.3 Emissions And Controls2-7,41

Increase Mercury Oxidation And Scrubber Capture Biology ...

In a cement plant, grate cooler is a basic machine in the calcining cement system, its main function is to make the ripe cement material to next system. At the same time, the grate cooler could offer rotary kiln and decomposing furnace hot air flow, which is the main equipment for …

Metals Emissions from Taconite Ore Processing Facilities ...

The induration or heating of the green balls can be done in a vertical shaft furnace on a travel grate (straight grate) or by a combination of a travel grate and a rotary kiln (grate- kiln). The finished product is taconite pellets.

EP2559961A1 - Grate cooler for a cement clinker kiln ...

----- 2.2.5.2 Grate Kiln Indurating Furnace The grate kiln indurating furnace system consists of a traveling grate, a rotary kiln, and an annular cooler. The grate kiln system represents a newer generation of indurating furnaces and is widely used by the taconite plants.

CONTRIBUTIONS TO THE TECHNOLOGY COMPARISON …

Taconite, a low grade iron ore of approximately 30% iron content or lower, is mined (by open-pit ... There are three different furnace types: a) grate-kiln, which consists of a traveling grate, a rotary kiln, and an annular cooler; b) straight grate; and c) vertical-shaft, which handles a …

40 CFR § 63.9652 What definitions apply to this subpart ...

from a rail-linked facility, United Taconite LLC's Thunderbird Mine. The connecting rail is owned and operated by a third party. Fine crushing and grinding of crude ore and magnetic separation processes produce a taconite concentrate, which is used to make pellets. Taconite pellets are thermally hardened in two grate-kiln indurating furnaces.

40 CFR § 63.9652 - What definitions apply to this subpart ...

a shaft furnace system, a straight grate system and a grate-kiln-cooler system. Shaft furnaces are the most traditional facilities; however, few plants use this system these days because of their limited scale. A straight grate system emerged in the industry soon after the shaft furnaces. It consists of a single unit

usa grate kiln cooler pelletisation process

Taconite Industry Products and By-products: An Investigation of Alternative Uses and Their Economic Potential .....64 Up-Grade CFD Cooler Models for Grate-Kiln Systems, and Perform Cooler Evaluation of Cooler Speed/Bed Depth on

Mercury Transport in Taconite Processing Facilities: (III ...

to the traveling grate furnace for further drying and preheating. The grate is fired by natural gas. From this point, the pellets are charged into the large rotary kiln where they are heat-hardened at 2,400 degrees Fahrenheit. The pellets are discharged into the revolving cooler and then moved to the pellet screening plant, onto the pellet

INFLUENCE OF HIGH INTENSITY MIXING ON GREEN BALL …

Grate-Kiln iron ore pelletizing system Introduction • Grate-Kiln systems used in places where coal is abundant and other fuel types are expensive • is the world's leading designer of grate-kiln systems, with 54 installations worldwide, equating to an installed capacity of over 140 million tons •Capacities ranging from 3 million

Grate kiln system - Outotec

Project – Line #2 Furnace Grate Replacement - $3,200,000 In 2019, United Taconite purchased a grate blanket for replacement of the Furnace Line #2 grate. The production constraint at United Taconite is the pellet plant. The pellet plant consists of two furnace lines;

Metals Emissions from Taconite Ore Processing Facilities ...

existing grate kiln indurating furnaces processing hematite. Test Protocol Unit 1 Indurating Furnace and A 40 CFR 63 Subparts RRRRR and A 40 CFR Part 63 Subparts RRRRR (see TACONITE MACT REQUIREMENTS below) 1. Pollutant Limit Time Period/ Operating Scenario Equipment Monitoring/ Testing Method Underlying Applicable Requirements 5.

Pelletizing - Wikipedia

US3539336A US3539336DA US3539336A US 3539336 A US3539336 A US 3539336A US 3539336D A US3539336D A US 3539336DA US 3539336 A US3539336 A US 3539336A Authority US United States Prior art keywords pellets indurating spilled furnace ore Prior art date 1968-08-20 Legal status (The legal status is an assumption and is not a legal conclusion.

tilden

The Grate, the Kiln and the Cooler. The object of the process is to transform the pelletized concentrate into hardened pellets that can be used as blast furnace feed or direct reduction furnace feed. The Travelling Grate is where pellets are dried and then heated up to a temperature of about 800-900 deg C.

SS emi-Annual Report

Their taconite processing plants use heat in furnaces to oxidize and indurate iron in the final stage of making a taconite pellet. Facilities can increase efficiencies when refractory service life is maintained. Efficiencies gained include: less fuel used, better quality control, better furnace control, and less mechanical component maintenance.

Appendix 9J Emission Limits – Excerpts from ROP for Tilden ...

The pellets are heated to a temperature of 2,000A°F on the travel grating before being hardened in the rotary kiln furnace. Then the hardened pellets enter the chilling zone of the annulate ice chest. (2) Figure: Grate Kiln. 2.2 Mercury Release in Taconite Processing

Pelletizing - Wikipedia

subd. 4, Taconite, other ores, metals, or minerals; production materials Minnesota Statutes 298, Minerals Taxes Minnesota Statute 298.24, Tax on Taconite and Iron Sulphides Minnesota Rule 8130.5500, Agricultural and Industrial Production Minnesota Rule 8130.9600, Iron Mining Industry Exemptions Other Fact Sheets Capital Equipment Clothing

11.23 Taconite Ore Processing

Kiln speed is variable to vary pellet retention time. The kiln is a single chamber with an open feed end connected by housing to the grates preheat furnace Through this connection is the inflow of material to the kiln and outflow of kiln gas to the preheat furnace. The kiln's discharge end is open and connected to the cooler by a firing hood.

Taconite Mining and Processing Industry Profile

Taconite, a low grade iron ore of approximately 30% iron content or lower, is mined (by open-pit ... There are three different furnace types: a) grate-kiln, which consists of a traveling grate, a rotary kiln, and an annular cooler; b) straight grate; and c) vertical-shaft, which handles a …

usa grate kiln cooler pelletisation process

Jan 01, 2015· Straight grate, grate-kiln, and shaft furnaces account for approximately 58%, 35%, and 6%, respectively, of world pellet production in 2013 . Therefore, the grate-kiln and straight grate systems are the dominant technologies currently being used in the iron ore pelletizing industry.

AP-42 Background Document for Section 11.23 Taconite Ore ...

Plant overview Grate-KilnTM iron ore pelletizing system The first Grate-KilnTM system pellet plant was installed in 1960. The plant took iron ore concentrate and produced superior iron ore pellets (which are spheres of high iron content and uniform quality) for blast furnace and direct reduced iron feed. Since then, Grate-Kiln systems have been used for over 50 plants, on both magnetite and ...

SS emi-Annual Report

existing grate kiln indurating furnaces processing hematite. Test Protocol Unit 1 Indurating Furnace and A 40 CFR 63 Subparts RRRRR and A 40 CFR Part 63 Subparts RRRRR (see TACONITE MACT REQUIREMENTS below) 1. Pollutant Limit Time Period/ Operating Scenario Equipment Monitoring/ Testing Method Underlying Applicable Requirements 5.

Mining – Metals, Minerals, Ore, and Taconite

2.4 Pot Grate Furnace The pot grate furnace and related test results have historically been used to design both straight-grate and grate-kiln induration machines for decades. The pot grate furnace consists of 1ft 2 pot with grate bars the bottom to allow airat penetration.flow The burner/combustion

Iron ore pelletization - ScienceDirect

Ninety-nine percent of the crude iron ore produced in the United States is taconite. If magnetite is the principal iron mineral, the rock is called magnetic taconite; if hematite is the principal X Straight grate furnace feed 3-03-023-79 Y Vertical shaft furnace feed 3-03-023-69 Z Hearth layer feed to furnace 3-03-023-48 AA Grate/kiln, gasget price

Understanding Pellets and Pellet Plant Operations – IspatGuru

Mar 21, 2015· Fig 2 Typical schematic diagram of straight grate system. The grate-kiln system depicted in Fig 1 consists of a traveling grate for drying and preheating the pellets to about 1040 deg C, a rotary kiln for uniformly heating the throughput to the final induration temperature of 1315 deg C, and an annular cooler for cooling the product and heat recuperation.

Taconite Mining and Processing Industry Profile

The raw material is rolled into a ball, then fired in a kiln or in travelling grate to sinter the particles into a hard sphere. The configuration of iron ore pellets as packed spheres in the blast furnace allows air to flow between the pellets, decreasing the resistance to the air that flows up through the layers of material during the smelting.

Iron Ore Pelletizing Grate-Kiln System Brochure - ...

A cooling grate for cooling and transporting of cement clinker having at least one grate element 1 with at least one support 10 for cement clinker, having at least one cooling air channel 20 discharging into the support 10 which is inclined in conveying direction 2 at least in a section 24 adjacent to its outlet used to inject cooling air into the clinker has improved cooling characteristics ...

Mercury Chemistry and Mössbauer Spectroscopy of Iron ...

grate), In the Swedish province of Norbotten, where LKAB operates 4 grate-kiln and 2 straight grate plants with a total capacity of 16.5 million t/a (2/3 grate kiln, 1/3 straight grate) and in Canada, where IOC operates 4 straight grates at Carol Lake, New Foundland, with a combined capacity of 13 million t/a.

Understanding Pellets and Pellet Plant Operations – IspatGuru

4.3.1.1 Grate/Kiln Furnaces. For grate/kilns, data were available on emissions of a wide variety of pollutants from the production of both acid pellets and flux pellets. The following paragraphs first describe how the candidate emission factors for grate/kiln furnaces were developed. 4.3.1.1.1 Filterable PM.

–– Iron Ore Pelletization Iron Ore ...

a shaft furnace system, a straight grate system and a grate-kiln-cooler system. Shaft furnaces are the most traditional facilities; however, few plants use this system these days because of their limited scale. A straight grate system emerged in the industry soon after the shaft furnaces. It consists of a single unit

Clinker Grate Cooler - Rotary Kiln|Crusher|Preheater

Mar 21, 2015· Fig 2 Typical schematic diagram of straight grate system. The grate-kiln system depicted in Fig 1 consists of a traveling grate for drying and preheating the pellets to about 1040 deg C, a rotary kiln for uniformly heating the throughput to the final induration temperature of 1315 deg C, and an annular cooler for cooling the product and heat recuperation.