Enriched superphosphate and preparation method for same

A technology rich in calcium superphosphate and sulfuric acid, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of high quality requirements and long curing time of phosphoric acid and phosphate rock powder, and achieve good social and economic benefits and wide sources of raw materials , the effect of broad market prospects

Inactive Publication Date: 2017-05-24
贵州越都化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing production method of rich superphosphate uses phosphoric acid and phosphate rock powder to react, the aging time is long, and the quality requirements of phosphoric acid and phosphate rock powder are relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The calcium superphosphate-enriched product is composed of 20-40 parts of carboapatite, 5-15 parts of sulfuric acid, 5-15 parts of spent acid and 5-15 parts of activated loosening agent according to weight.

[0035] Described calcium superphosphate rich and preparation method thereof comprise the following steps:

[0036] (1) Mixing sulfuric acid and waste acid to prepare mixed acid A;

[0037] (2) Mix and react the prepared mixed acid A with carbonapatite, heat and stir for 2-6 hours to obtain product B;

[0038] (3) The prepared product B is added with an activating loosening agent, stacked and matured for 12-16 days, granulated, dried, sieved, and cooled to obtain the product.

Embodiment 2

[0040] By weight, it consists of 30 parts of carboapatite, 10 parts of sulfuric acid, 10 parts of waste acid and 10 parts of activated loosening agent.

[0041] (1) Mixing sulfuric acid and waste acid to prepare mixed acid A;

[0042] (2) Mix and react the prepared mixed acid A with carbonapatite, heat and stir for 4 hours to obtain product B;

[0043] (3) The prepared product B is added with an activating loosening agent, stacked, matured and neutralized for 14 days, granulated, dried, sieved and cooled to obtain the product.

Embodiment 3

[0045] A superphosphate-rich calcium superphosphate is composed of 20 parts of carboapatite, 5 parts of sulfuric acid, 5 parts of spent acid and 5 parts of activated loosening agent by weight.

[0046] Described calcium superphosphate rich and preparation method thereof comprise the following steps:

[0047] (1) Mixing sulfuric acid and waste acid to prepare mixed acid A;

[0048] (2) Mix and react the prepared mixed acid A with carbonapatite, heat and stir for 2 hours to obtain product B;

[0049] (3) The prepared product B is added with an activating loosening agent, stacked, matured and neutralized for 12 days, granulated, dried, sieved and cooled to obtain the product.

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PUM

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Abstract

The invention discloses enriched superphosphate, which is prepared from the following components in parts by weight: 20 to 40 parts of carbonate apatite, 5 to 15 parts of a sulfuric acid, 5 to 15 parts of a waste acid and 5 to 15 parts of an active porous agent. According to the enriched superphosphate, the adopted active porous agent has the effect of increasing the curing speed, so that the production time is greatly reduced; a process is simple and easy to implement; moreover, the raw materials are extensive, and the enriched superphosphate is low in cost and suitable for industrial production, and has broad market prospect and good social and economic benefits.

Description

technical field [0001] The invention relates to a rich calcium superphosphate and a preparation method thereof, belonging to the technical field of chemical fertilizer production. Background technique [0002] Rich superphosphate is generally 20% to 30%, and the effective P2O5 content is between ordinary calcium and heavy calcium. Due to the low content of ineffective substances rich in superphosphate, the storage and transportation costs per unit of effective substances can be reduced, and the packaging and application costs can be reduced. Using it as a compound fertilizer instead of common calcium can increase the active ingredients in the compound fertilizer, and can replace expensive ammonium phosphate or heavy calcium in the production of compound fertilizers to produce medium-concentration fertilizers, greatly reducing production costs. Rich superphosphate can also be used as an intermediate product for deep processing to produce feed calcium hydrogen phosphate and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/00C05B11/08C05B11/00C05G3/80
CPCC05B11/00C05B11/08C05G3/00C05G3/80
Inventor 李昂李勇吴桂清徐光兴刘福祥周德兵邓正军项代福宋运良
Owner 贵州越都化工有限公司
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