Preparation method of hydroxy calcium phosphate

A hydroxycalcium phosphate and calcium-enriched technology, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of high cost and heavy environmental load, and achieve the effects of low cost, improved utilization rate, and good application prospects

Inactive Publication Date: 2019-03-29
YANGTZE NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a preparation method of calcium hydroxyphosphate, which solves the problems of high cost and heavy environmental load in the existing calcium hydroxyphosphate, which uses natural ore or artificial synthetic reagent as the main raw material , and at the same time provide a new technical path for the high value-added utilization of hardened gel

Method used

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  • Preparation method of hydroxy calcium phosphate
  • Preparation method of hydroxy calcium phosphate

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Experimental program
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Embodiment 1

[0036] 1) Select waste concrete from construction waste, use a small hammer crusher for primary crushing and control the output particle size to ≤10mm, put the waste concrete after primary crushing into a corundum crucible and put it into a box-type resistance furnace in different Pre-burning is carried out under the temperature system, the pre-burning temperature is controlled at 400°C, the furnace temperature is lowered to below 100°C and taken out, and the waste concrete blocks cooled to room temperature are crushed and separated in an electromagnetic vibrating pulverizer, and the vibrating pulverization time is controlled After shaking and separating, pour it into a 60-mesh square-hole sieve, and separate the coarse aggregate and fine powder in the waste concrete by sieving. The waste concrete fine powder with a small diameter passes through the sieve hole to become the undersieve, removes the sieved part with a large particle size, and collects the sieved fine particles fo...

Embodiment 2

[0042] 1) Select waste concrete from construction waste, use a small hammer crusher for primary crushing and control the output particle size to ≤10mm, put the waste concrete after primary crushing into a corundum crucible and put it into a box-type resistance furnace in different Pre-burning is carried out under the temperature system, the pre-burning temperature is controlled at 500°C, the furnace temperature is lowered to below 100°C and taken out, and the waste concrete blocks cooled to room temperature are crushed and separated in an electromagnetic vibrating pulverizer, and the vibrating pulverization time is controlled After shaking and separating, pour it into a 200-mesh square-hole sieve, and separate the coarse aggregate and fine powder in the waste concrete by sieving. The waste concrete fine powder with a small diameter passes through the sieve hole to become the undersieve, removes the sieved part with a large particle size, and collects the sieved fine particles f...

Embodiment 3

[0048]1) Select waste concrete from construction waste, use a small hammer crusher for primary crushing and control the output particle size to ≤10mm, put the waste concrete after primary crushing into a corundum crucible and put it into a box-type resistance furnace in different Pre-burning is carried out under the temperature system, the pre-burning temperature is controlled at 600°C, the furnace temperature is lowered to below 100°C and taken out, and the waste concrete blocks cooled to room temperature are crushed and separated in an electromagnetic vibrating pulverizer, and the vibrating pulverization time is controlled After shaking and separating, pour it into a 325-mesh square-hole sieve, and separate the coarse aggregate and fine powder in the waste concrete through sieving. The coarser aggregates will stay on the square-hole sieve, and The waste concrete fine powder with a small diameter passes through the sieve hole to become the undersieve, removes the sieved part w...

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Abstract

The invention discloses a preparation method of hydroxy calcium phosphate. The hydroxy calcium phosphate is prepared with hardened gel in waste concrete as a raw material. The purity of the obtained hydroxy calcium phosphate is high, the uniformity of grain compositions and the grain size is improved, the grain size is generally less than 20 [mu]m, the hydroxy calcium phosphate is mainly preparedfrom rodlike and flat-sheet-shaped grains, and the quality of the hydroxy calcium phosphate is effectively improved. The raw material is low in cost and easy to obtain, the process is simple and easyto implement, the cost is low, and large-scale industrial production is easy. Resource utilization of the hardened gel in the waste concrete can be improved, meanwhile, an environment-friendly new material which is large in storage quantity, wide in source, low in cost and easy to obtain and conforms to national related supportive policies is also provided for preparation of the hydroxy calcium phosphate, and the preparation method of the hydroxy calcium phosphate has obvious social benefits and environmental benefits.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a preparation method of calcium hydroxyphosphate. Background technique [0002] Due to its excellent biocompatibility, bioactivity, high chemical stability and mechanical properties, calcium hydroxyphosphate is widely used in biomaterials, ceramic materials and suspension dispersion materials. For example, in the field of biomaterials, it can be used as a human bone repair material with good biocompatibility, and has the characteristics of stimulating the growth of bone cells and synchronously degrading themselves. In the suspension polymerization of petrochemical industry, hydroxy-activated calcium phosphate can make the particle size distribution of the polymer resin concentrated, the reaction temperature and pressure are stable, and the material is not easy to stick to the wall of the reaction kettle and the agitator, which can prolong the cleaning period of the ket...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/32
Inventor 刘东升陈龙雨周丽新朱秋银宋金锋陈昔勇
Owner YANGTZE NORMAL UNIVERSITY
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