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A kind of preparation method of chain calcite type calcium carbonate

A calcite type, calcium carbonate technology, applied in the direction of calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc., can solve the problems of large dosage of crystal control agent, affecting application effect, rising product cost, etc. , to achieve good economic benefits, improve application effects, and low production costs

Active Publication Date: 2019-12-06
ANHUI PROVINCE XUNCHENG CITY HUANA NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as far as industrial production is concerned, excessive dosage or high price of the crystal form control agent will lead to an increase in product cost, and the residual crystal form control agent in the product may also affect its application effect

Method used

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  • A kind of preparation method of chain calcite type calcium carbonate
  • A kind of preparation method of chain calcite type calcium carbonate
  • A kind of preparation method of chain calcite type calcium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A preparation method for chain calcite type calcium carbonate, comprising the following steps:

[0050] (1) Limestone crushing and calcination: After the limestone is crushed by a jaw crusher with a discharge diameter of 41mm, it is sieved through a 2-mesh standard sieve, and the remaining limestone is calcined at 900°C for 700min in a high-temperature furnace. The quicklime obtained by calcination is controlled Digestion rate t 600.66min, residual carbon dioxide is 0.51%;

[0051] (2) digestion of lime: the unslaked lime obtained by step (1) calcining is mixed with water according to the ratio of 1:10 according to the mass ratio of water to cement, and the high-speed mixer is stirred and digested for 15min at a rotating speed of 500r / min to obtain lime slurry;

[0052] (3) Lime slurry pretreatment: After the lime slurry is passed through a 150-mesh sieve to remove slag, the particle size distribution D (10) is obtained as 1.127 μm, and D (97) is 15.339 μm of lime slur...

Embodiment 2

[0057] A preparation method for chain calcite type calcium carbonate, comprising the following steps:

[0058] (1) Limestone crushing and calcination: After the limestone is crushed by a jaw crusher with a discharge diameter of 41mm, it is sieved through a 2-mesh standard sieve, and the remaining limestone is calcined at 1050°C for 350min in a high-temperature furnace. The quicklime obtained by calcination is controlled Digestion rate t 60 0.81min, residual carbon dioxide is 0.43%;

[0059] (2) digestion of lime: the unslaked lime obtained by step (1) calcining is mixed with water according to the ratio of 1:8 according to the water-cement mass ratio, and the high-speed mixer is stirred and digested for 20min at a rotating speed of 300r / min to obtain lime slurry;

[0060] (3) Lime slurry pretreatment: After passing the lime slurry through a 150-mesh sieve to remove slag, sand mill it for 5 minutes to obtain a particle size distribution D (10) of 1.212 μm and a D (97) of 17.18...

Embodiment 3

[0065] A preparation method for chain calcite type calcium carbonate, comprising the following steps:

[0066] (1) Limestone crushing and calcination: After the limestone is crushed by a jaw crusher with a discharge diameter of 41mm, it is sieved through a 2-mesh standard sieve, and the remaining limestone is calcined at 1100°C for 300min in a high-temperature furnace. The quicklime obtained by calcination is controlled Digestion rate t 60 0.78min, residual carbon dioxide is 0.69%;

[0067] (2) digestion of lime: the unslaked lime obtained by step (1) calcining is mixed with water according to the ratio of 1:8 according to the water-cement mass ratio, and the high-speed mixer is stirred and digested for 25min at a rotating speed of 350r / min to obtain lime slurry;

[0068] (3) Lime slurry pretreatment: After passing the lime slurry through a 150-mesh sieve to remove slag, the particle size distribution D(10) is 1.259 μm, and D(97) is 18.113 μm lime slurry, and the obtained lim...

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Abstract

The invention discloses a preparation method of chain calcite calcium carbonate, which comprises the steps of breaking and sieving limestone, calcining limestone screenings with a high-temperature furnace, controlling a digestion rate t60 of quicklime obtained by calcining to be less than or equal to 1.5min, and a residual quantity of carbon dioxide to be less than or equal to 0.7%, mixing the quicklime and water for digestion reaction to form lime slurry, sieving the lime slurry with a 150-mesh sieve for deslagging, performing sanding for 0-10min, controlling particle size distribution of thelime slurry, adjusting a solid content of the lime slurry, conveying the lime slurry to a carbonizer for carbonation reaction to form a calcium carbonate suspension, and performing surface treatment,dehydration with a press filter, drying, grinding and screening to form calcium carbonate. The method does not require a crystal form control agent; chain calcium carbonate can be prepared only by controlling the lime, the lime slurry and a carbonation reaction technology; and the method can solve the problems of high cost and poor product quality caused by use of the crystal form control agent in the prior art.

Description

technical field [0001] The invention relates to the technical field of calcium carbonate preparation, in particular to a preparation method of chain calcite type calcium carbonate. Background technique [0002] Calcium carbonate is an important inorganic chemical material with a wide range of uses. Calcium carbonate with different crystal forms and shapes has different functions and field applications. Chain calcium carbonate is composed of a plurality of cubic or spherical calcium carbonate primary particles connected end-to-end, with an obvious chain structure, and the sense of chain particles is obvious. Compared with granular fillers, chain calcium carbonate modified plastics can greatly improve their mechanical properties and improve the processing performance of plastic products. Chain calcium carbonate can be used as rubber reinforcing filler. During rubber processing, some chain calcium carbonate breaks to form high active points, which are easy to bond with polyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18B82Y40/00
CPCC01F11/181C01P2002/72C01P2004/03C01P2004/62C01P2004/64
Inventor 莫英桂朱勇韦健毅满治成黎宇平刘松豪覃香梅
Owner ANHUI PROVINCE XUNCHENG CITY HUANA NEW MATERIAL TECH CO LTD