Methods for producing alkaline earth carbonates

A carbonate, alkaline earth technology, applied in magnesium carbonate, chemical instruments and methods, calcium carbonate/strontium/barium, etc., can solve the problems of unclear industrial scale, dependence on seeds and limited industrial applications, etc.

Inactive Publication Date: 2017-03-22
LIXIVIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no means for capturing or containing the ammonia that would be produced from such a process, so it is n...

Method used

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  • Methods for producing alkaline earth carbonates
  • Methods for producing alkaline earth carbonates
  • Methods for producing alkaline earth carbonates

Examples

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Embodiment

[0126] Raw Materials and Methods

[0127] In these experiments, two basic oxygen furnace (BOF) slags were used as feedstock sources of extractable calcium oxide / hydroxide. One sample consisted of raw fines from the U.S. Steel Lake Erie Works in Canada, while the other was a sample from a waste stream produced at the slag recycling plant of Ruukki Metals Raahe Works in Finland. The composition of these slags analyzed by XRF is provided in Figure 14 in the table shown in . As the materials had been stored in the open air, they were calcined at 900°C for 3 hours before extraction to reduce any material that might have been carbonated by environmental factors.

[0128] U.S. steel slag is directly screened to the desired size fraction, while Ruukki slag is first ground to a smaller size fraction and then screened to the final desired size fraction. In this experiment, a specified amount of slag was mixed with an amount of ammonium chloride leachant solution of known concentra...

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Abstract

Hydrometallurgical systems, methods, and compositions are described in which amine-based lixiviants are utilized in substoichiometric amounts to recover alkaline earths from raw or waste materials. The lixiviant can be regenerated and recycled for use in subsequent iterations of the process or returned to a reactor in a continuous process. Extraction of the alkaline earth from the raw material and precipitation of the extracted alkaline earth is performed in the same reactor and essentially simultaneously.

Description

[0001] This application claims the benefit of priority of U.S. Provisional Application No. 61 / 985,036 filed on April 28, 2014. This US provisional application and all other cited external materials are hereby incorporated by reference in their entirety. technical field [0002] The field of the invention is hydrometallurgy, in particular the invention relates to the extraction or recovery of alkaline earth elements. Background technique [0003] This Background Description includes information that may be used in understanding the present invention. This Background is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that publications specifically or implicitly cited are prior art. [0004] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application was specifically and individually indicated to be incorporated by reference. To the...

Claims

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Application Information

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IPC IPC(8): C01F11/18C01F3/00C01F5/24C01F7/00C01F13/00
CPCC01F3/00C01F5/24C01F11/18C01F13/00C01P2004/03
Inventor 迈克尔·维尔斯塔扎卡里·J·A·科蒙
Owner LIXIVIA
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