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A method for co-producing chemically synthesized fertilizer with industrial calcium products

A chemical synthesis and industrial technology, applied in chemical instruments and methods, calcium/strontium/barium compounds, inorganic chemistry, etc., can solve problems such as secondary pollution, speed up enterprise transformation, enhance enterprise market competitiveness, and increase product added value value effect

Active Publication Date: 2018-03-13
CHONGQING HUAQIANG ECOLOGICAL FERTILIZER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the purpose of the present invention is to utilize the raw material slurry method ammonium phosphate production line to produce industrial calcium products and co-produce chemically synthesized fertilizers. And the secondary pollution problem brought to the environment makes full use of calcium resources

Method used

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  • A method for co-producing chemically synthesized fertilizer with industrial calcium products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 Shown, prepare technical grade calcium sulfate and binary chemical synthetic fertilizer according to the following methods:

[0031] 1. Analysis of main components of phosphate rock:

[0032] composition

content

composition

content

P 2 o 5

29％

Fe 2 o 3

1.07％

MgO

2.5％

CaO

50％

al 2 o 3

2.3％

acid insoluble matter

6.13％

h 2 o

5％

F -

4.67％

[0033] 2. Mix 1 ton of mineral powder into 1.54 tons of slurry.

[0034] 3. Add 1.54 tons of ore pulp obtained in step 2 and 2628.8 kilograms of nitric acid solution and 3 kilograms of urea with a concentration of 50% in the acidolysis tank in the raw material slurry method production line. The reaction time was 1.5 hours, and the reaction temperature was 60°C.

[0035] 4. After the reaction is completed, filter. The filter residue is sent to the compound fertilizer workshop, and the filtrate is sent to the def...

Embodiment 2

[0044] Prepare industrial-grade calcium carbonate and chemically synthesized compound fertilizers as follows:

[0045] 1. Analysis of main components of phosphate rock:

[0046] composition

content

composition

content

P 2 o 5

27.83％

Fe 2 o 3

0.86％

MgO

2.6％

CaO

48.92％

al 2 o 3

2.27％

acid insoluble matter

6.27％

h 2 o

5％

F -

3.98％

[0047] 2. Mix 1 ton of mineral powder into 1.515 tons of slurry.

[0048] 3. Add 1.515 tons of ore pulp of step 2 gained and concentration of 48% nitric acid solution 2625 kg and 4 kg of urea respectively to the acidolysis tank in the raw material slurry method production line. The reaction time was 2 hours, and the reaction temperature was 58°C.

[0049] 4. After the reaction is completed, filter. The filter residue is sent to the compound fertilizer workshop, and the filtrate is sent to the defluorination tank in the raw material slurry pro...

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Abstract

The invention relates to a method for co-production of a chemical synthetic fertilizer by industrial calcium products, and belongs to the field of production of agricultural fertilizers. The method comprises the following steps: preparing phosphorite powder into ore pulp by using a raw material slurry method, reacting the ore pulp with nitric acid, and filtering; feeding filter residues to a compound fertilizer workshop to produce a nitrohumic acid compound fertilizer; adding sodium nitrate in the filtrate to remove fluoride; centrifugally dehydrating; drying the filter residues to prepare sodium fluosilicate; adding ammonium sulfate, potassium sulphate or potassium carbonate in the filtrate to deposit calcium; then filtering; preparing the industrial calcium products from the filter residues; and neutralizing, concentrating, guniting, drying, cooling, enveloping, metering and packing the filtrate to obtain the chemical synthetic fertilizer.

Description

technical field [0001] The invention relates to a method for producing chemically synthesized fertilizers and industrial calcium products using a slurry method ammonium phosphate production line, which belongs to the field of agricultural fertilizer production, and specifically relates to a method for decomposing phosphate rock with a certain concentration of nitric acid solution on a material method production line Slurry, then SO 4 2- or CO 3 2- Water-soluble compounds containing the above ions make Ca 2+ Precipitation is formed, washed and purified, and then dried to obtain calcium products such as industrial grade calcium sulfate and calcium carbonate; the clear liquid is used to prepare chemically synthesized fertilizers. Background technique [0002] The slurry method ammonium phosphate production process usually uses sulfuric acid to decompose phosphate rock, and the slurry is neutralized, concentrated, sprayed, granulated, and dried to realize the production of m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/46
CPCC01B33/103C01F11/181C01F11/46C01P2006/80C05B11/06
Inventor 谢光强刘成斌蔡昆罗志夏云赵启敏张睿梁玻
Owner CHONGQING HUAQIANG ECOLOGICAL FERTILIZER IND CO LTD
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