kaolin crusher for sale strengthening agents - 1 views

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  #1 betsy stone on 26 Aug 14

   

  Attempts have been made to define the specific nature of the bonding mechanism produced by the process of this invention. It has been determined that the heat, pressure, and moisture condition of the hydrothermal hardening step causes a formation of gels at the points of contact of agglomerate particles and that these gels harden upon drying of the agglomerate to form bonds between the particles. It has also been determined that the siliceous material,kaolin crusher for sale particularly silica, and the bonding agent, particularly lime, are important constituents for the formation of these gels and that the strengthening agents tend to accelerate the gel formation. Generally, it has been found that the use of alkali metal compound produces stronger bonds than alkaline earth oxides, hydroxides and carbonates. Hence, it appears that gels formed in the presence of the alkali metal compounds have a different chemical composition and/or physical arrangement than those formed in the presence of these alkaline earth compounds.
  
  The following examples are presented to illustrate this invention and should not be construed as limitations thereto. In order to better understand the nature of the bonding mechanism, a study was made to identify the characteristics of the matrix of agglomerates made according to the process of this invention. As used herein the term "matrix" means the non-iron oxide portions of the agglomerate (e.g. metallic iron, lime, silica,crushed stone machine prices slag and coke) which acts to bond the agglomerate together. The agglomerates investigated were hydrothermally cured at a temperature of about 200°C and a pressure of approximately 200 psig. Calcium hydroxide was used as a bonding agent and diatomaceous earth as the siliceous material.
  
  The matrix of the agglomerates were examined by electron microprobe. It was observed that the matrix of all of the agglomerates consisted of more than one phase. From this observation, it is believed that one phase of the matrix may be the remnants of silicates contained in the steel plant waste duct used in the starting mixture and other unreacted additives. The remaining phases were apparently formed during the hydrothermal curing step. During this analysis, Ca, Si, Fe and Mg were identified as the major components in the agglomerate matrix. Although not positively identified, it is assumed that oxygen and water comprised the remainder of the matrix.

   

  <div class="cArrow"> </div><div class="cContentInner">Attempts have been made to define the specific nature of the bonding mechanism produced by the process of this invention. It has been determined that the heat, pressure, and moisture condition of the hydrothermal hardening step causes a formation of gels at the points of contact of agglomerate particles and that these gels harden upon drying of the agglomerate to form bonds between the particles. It has also been determined that the siliceous material,<a href="http://www.sellercrusher.com/solutions/kaolin-crusher-for-sale.html" rel="nofollow">kaolin crusher for sale</a> particularly silica, and the bonding agent, particularly lime, are important constituents for the formation of these gels and that the strengthening agents tend to accelerate the gel formation. Generally, it has been found that the use of alkali metal compound produces stronger bonds than alkaline earth oxides, hydroxides and carbonates. Hence, it appears that gels formed in the presence of the alkali metal compounds have a different chemical composition and/or physical arrangement than those formed in the presence of these alkaline earth compounds. <br /> <br /> The following examples are presented to illustrate this invention and should not be construed as limitations thereto. In order to better understand the nature of the bonding mechanism, a study was made to identify the characteristics of the matrix of agglomerates made according to the process of this invention. As used herein the term "matrix" means the non-iron oxide portions of the agglomerate (e.g. metallic iron, lime, silica,<a href="http://www.sellercrusher.com/solutions/crushed-stone-machine-prices.html" rel="nofollow">crushed stone machine prices</a> slag and coke) which acts to bond the agglomerate together. The agglomerates investigated were hydrothermally cured at a temperature of about 200°C and a pressure of approximately 200 psig. Calcium hydroxide was used as a bonding agent and diatomaceous earth as the siliceous material. <br /> <br /> The matrix of the agglomerates were examined by electron microprobe. It was observed that the matrix of all of the agglomerates consisted of more than one phase. From this observation, it is believed that one phase of the matrix may be the remnants of silicates contained in the steel plant waste duct used in the starting mixture and other unreacted additives. The remaining phases were apparently formed during the hydrothermal curing step. During this analysis, Ca, Si, Fe and Mg were identified as the major components in the agglomerate matrix. Although not positively identified, it is assumed that oxygen and water comprised the remainder of the matrix.</div>

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