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Process for producing gas from mineral ore

A technology of gas and ore, which is applied in the field of gas production from trona ore, to achieve the effect of reducing energy consumption

Inactive Publication Date: 2012-01-04
SOLVAY SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This dust-collected gas would need to be settled or filtered through expensive equipment

Method used

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  • Process for producing gas from mineral ore
  • Process for producing gas from mineral ore
  • Process for producing gas from mineral ore

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0085] Rotary calciner with oil heating for indirect heating.

[0086] The Effect of Oxidizing Atmospheres on Volatile Organic Compounds.

[0087] Mount a 0.5 L volume laboratory borosilicate glass flask on a rotary axe. It was introduced into a hot oil bath heated at 200°C so as to cover half of the surface of the glass flask.

[0088] A rotary engine was used to obtain a rolling mass of solids inside the glass flask when the crushed trona was introduced.

[0089] A gas carrier was injected into the glass flask and then pumped out to analyze the amount of volatile organic compounds generated in the flow path. Continuous monitoring was used to measure the amount of volatile organic compounds (VOC) in the flow path using a thermal trace at 180°C to a calibrated Flame Ionization Analyzer. The measurement program is completed according to the EN13526 standard. The amount of VOC is integrated throughout the calcination of the product to give the total VOC produced during calci...

example 2

[0097] Indirectly heated rotary calciner.

[0098] In this example, a rotary calciner setup was used. Its main features are: 0.4 m diameter, 3.2 m long, made of stainless steel, internally equipped with twelve 2.8 long smooth steam pipes and each diameter is 48mm; steam pipe feed can be at 20 bar, 33 bar or 40 bar of pressurized steam to heat the calciner. The calciner was continuously fed with less than 0.7 mm (1 / 4 inch) of crushed trona, establishing a permanent regime and running continuously on weekly extrusion. The crushed trona flow rate fed to the rotary calciner was monitored. The crushed trona feed rate was adjusted for each operating condition so as to have less than 1% by weight of uncalcined sesquicarbonate at the outlet of the calciner. Air entry was restricted to obtain a carbon dioxide concentration of greater than 25% by volume (based on dry gas), and an oxygen concentration of less than 5.9% by volume (based on wet gas). The corresponding water vapor conce...

example 3

[0104] Example 3 (opposite example)

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PUM

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Abstract

Process for producing a gas from a mineral ore, and in particular from trona ore, said gas having a carbon dioxide concentration of more than 25 volume percents expressed on dry gas, and a quantity of volatile organic compounds of less than 700 mg per kilogram of generated carbon dioxide. The process comprises the steps of crushing the trona ore, introducing crushed trona in a rotary calcining drum with indirect heating, calcining the crushed trona in the calcining device, collecting the calcined trona from calcining device and collecting the gas generated by the trona ore calcination from calcining device in order to constitute the produced gas.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of European Patent Application No. 09152392.8 filed on February 9, 2009. technical field [0003] The invention relates to a method for the production of gas from mineral ores, in particular trona ores. It also deals with the gas that is produced, and what that gas is used for. Background technique [0004] Trona ore contains about 80%-95% trisodium bicarbonate (Na 2 CO 3 .NaHCO 3 .2H 2 O) a mineral. Large deposits of the mineral trona have been found in southwestern Wyoming near the Green River. This deposit consists of beds of trona and mixed trona and halite (rock salt or NaCl), which cover about 2600 km 2 . The main trona beds range in size from less than 428 km 2 to at least 1870km 2 . It is conservatively estimated that these major trona beds contain approximately 75 billion metric tons of ore. These various beds overlap each other and are separated by layers of sha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/20C01D7/35B01J6/00F26B11/04C01D7/12C01B32/50
CPCC01B31/20C01D7/35C01D7/123C01B32/50
Inventor 弗朗西斯·库斯特里佩里内·达瓦纳克劳德·克里亚多时达伊·周
Owner SOLVAY SA