KR20060094297A - Calcium composite fertilizer - Google Patents

Abstract

The present invention relates to a calcium compound fertilizer in which dolomite (CaMg [CO3] 2), shellfish (fossil powder fertilizer), quicklime (CaO) and gypsum (CaSO4) are mixed.

At present, the agricultural land of our country is severely acidified and contaminated due to excessive use of chemical fertilizers and excessive spraying of pesticides, and quicklime manure, slaked lime fertilizer, dolomite fertilizer (goto fertilizer), gypsum fertilizer to correct the acidified soil And lime-based materials containing calcium, such as shell powder fertilizer (Paspar powder fertilizer), as a single fertilizer.

However, due to the side effects of calcium (Ca) contained in lime-based fertilizers, the use of alkaline calcium in the above-mentioned lime-based fertilizers avoids the need for improvement of the polluting environment caused by alkaline calcium. have.

In addition, the gypsum is accumulated in the production process of fertilizers as the amount of the pile (野 積 量) year after year, cumulative, and in the present invention by using the discarded gypsum dolomite (CaMg [CO3] 2 ), And to provide a calcium compound fertilizer to correct the acidity of acidified farmland and sea soil by mixing with clam powder (quartz powder fertilizer) and quicklime (CaO).

Calcium, fertilizer, acidification

Description

Calcium composite fertilizer

The present invention relates to a calcium compound fertilizer in which dolomite (CaMg [CO3] 2), shellfish (fossil powder fertilizer), quicklime (CaO) and gypsum (CaSO4) are mixed.

At present, the agricultural land of our country is severely acidified and contaminated due to excessive use of chemical fertilizers and excessive spraying of pesticides, and quicklime manure, slaked lime fertilizer, dolomite fertilizer (goto fertilizer), gypsum fertilizer to correct the acidified soil And lime-based materials containing calcium, such as shell powder fertilizer (Paspar powder fertilizer), as a single fertilizer.

However, due to the side effects of calcium (Ca) contained in lime-based fertilizers, the use of alkaline calcium in the above-mentioned lime-based fertilizers avoids the need for improvement of the polluting environment caused by alkaline calcium. have.

In addition, the amount of gypsum accumulated in the production of fertilizer as the amount of the discharge (野 積 量) year after year. At one time, the consumption of gypsum, a by-product of fertilizer production, was supplied as gypsum fertilizer for agricultural land improvement. However, gypsum is weakly acidic, so it is known that acidification of farmland reverses acidity correction of farmland. It's almost impossible.

At present, the Uranara has a serious problem of acidification of lowland soil, which is a subsea soil of coastal sea, along with the problem of acidification of farmland as described above.

In general, as a method of improving the low quality soil of coastal seas, there is a method of overturning the soil under the polluted sea, but there is a disadvantage in that a lot of manpower, equipment, cost and time are required when working with the soil.

Applicants and inventors of the present invention, while studying the "low soil and water quality improvers of coastal seas" Patent Application No. 10-2002-0035715 filed on June 25, 2002, based on the floral soil, forest soil, farmland and In order to solve the problem of acidification of sea soil (low soil soil), dolomite (CaMg [CO3] 2), clam flour (calcite powder fertilizer), quicklime (CaO) and gypsum (CaSO4) of the present invention are mixed in a proportion Invented.

An object of the present invention is to improve the acidification of lowland soils, such as farmland and subsea soils, by using gypsum (CaSO4), which is discharged as a by-product during fertilizer production, and has an object of quicklime (CaO) and dolomite (CaMg [ CO3] 2), clam powder (calcite powder fertilizer) and gypsum (CaSO4) are achieved by a calcium compound fertilizer mixed in a proportion.

Calcium (Ca), which is commonly included in the substances, rises to strong alkalinity in the mixing process, and neutralizes (or weakly alkalines) agricultural soils and low soils which are currently acidified by making the most of the strong alkaline characteristics.

The present invention gypsum (CaSO4), a by-product of fertilizer production, magnesium oxide (MgO) and calcium (Ca) dolomite (CaMg [CO3] 2) (also known as dolomite, alkaline in the pH range of 8.0 to 8.1), shellfish It is characterized by mixing powder (calcite powder fertilizer) and quicklime (CaO) at a constant ratio.

The substances listed above contain a common calcium (Ca) component, as can be seen from the chemical symbol. Shellfish powder is composed of 51.6% by weight of calcium (Ca) and trace elements (mineral) as a result of component analysis by X-ray diffraction analysis.

The calcium (Ca) has an alkaline property and acidified agricultural soils mixed with inorganic substances such as iron (Fe), phosphorus (P) and aluminum (Al) in the soil and organic substances such as amines, amino acids and lower acid It is possible to calibrate the seabed soil environment to alkalinity.In particular, the calcium component (Ca) is increased by mixing quicklime (CaO), dolomite (CaMg [CO3] 2), clam (fertilizer powder fertilizer) and gypsum (CaSO4). This action causes strong alkalinization, and the dissolution of arsenic (As) and cadmium (Cd) is reduced in proportion to this, and mercury (Hg) and lead (Pb) are rapidly reduced even in the weak alkalinity of calcium. It has the power to decompose and neutralize heavy metals and oils, and improves the acidified polluting environment to alkaline.

Table 1 shows the results obtained by experimenting on the acidity (pH) of clam flour (mineral stone powder fertilizer), dolomite (CaMg [CO3] 2), quicklime (CaO) and gypsum (CaSO4) which are the constituent materials of the present invention.

Changes in pH (pH) of clam flour, dolomite (CaMg [CO3] 2), quicklime (CaO) and gypsum (CaSO4) Mixed amount (g / L) PH of experimental water 0.3 0.4 0.5 0.6 0.8 1.0 2.0 3.0 Clam flour Freshwater pH 6.9  7.2  7.2  7.2  7.3  7.3  7.4  7.6  7.8 Seawater pH 7.9  8.0  8.1  8.1  8.1  8.1  8.1  8.1  8.1 Dolomite Freshwater pH 6.9  6.9  6.9  6.9  6.9  7.0 7.1  7.1  7.1 Seawater pH 7.9  8.0  8.1  8.1  8.1  8.1  8.1  8.1  8.1 quicklime Freshwater pH 6.9  11.5 11.5 11.6 11.7 11.8 11.9 12.1 12.2 Seawater pH 7.9  10.1  10.1  10.2  10.2  10.2  10.2  10.3  10.3 gypsum Freshwater pH 6.9 7.00 6.98 6.96 6.92 6.88 6.82 6.76 6.67 Seawater pH 7.9 7.74 7.71 7.68 7,66 7.57 7.55 7.33 7.07

As shown in Table 1, the pH of the experimental water was pH 6.9 in fresh water (ground water) and pH 7.9 in sea water. If you mix by 0.3g / L, 0.4g / L, 0.5g / L, 0.6g / L, 0.8g / L, 1.0g / L, 2.0g / L and 3.0g / L,

Clam powder is pH 7.2 ~ 7.8 in fresh water (ground water), pH 8.0 ~ 8.1 in sea water, pH 6.9 ~ 7.1 in fresh water, pH 8.0 ~ 8.1 in sea water.Shellfish and dolomite are both weak alkaline and quicklime in fresh water. pH 11.5 ~ 12.2 pH 10.1 ~ 10.3 in seawater showed strong alkalinity above pH 9.0.

The clam flour was used as a roughly pulverized clam powder of 2 mm particle size.

For reference, the pH (acidity) of pure water is 7.0, which is called neutral. If the pH is less than 7, it is acidic.

On the other hand, as shown in Table 1, gypsum was lowered to a weak acidity of pH 7.0 ~ 6.67 as the mixing amount increased in fresh water (ground water), and it was lowered to an acidic pH value of 7.74 ~ 7.07 as the mixing amount increased in seawater. It can be seen that.

The gypsum used in this experiment was a gypsum discharged as a by-product from the fertilizer plant, which was reduced to 67.5% by weight after drying 100 g of wet gypsum, of which the actual recyclable amount was 60.3 except for 7.2% by weight of earthy impurities. Weight percent.

The experimental data of the calcium compound fertilizer mixed with gypsum, shellfish, dolomite (CaMg [CO3] 2) and quicklime (CaO) are as follows.

Experiment 1. Calcium compound fertilizer mixed with "gypsum" and "dolomite" + "shellfish" (7: 3)

PH change according to the mixing amount of "gypsum" and "dolomite" + "shellfish" (7: 3) Mixed amount (g / L) PH of experimental water 0.4 0.5 0.6 0.8 1.0 2.0 3.0 A gypsum + control (4: 6) Freshwater pH 7.01  9.46  9.68 9.85 10.20 10.46 10.72 10.99 Seawater pH 7.98  8.86  8.94  8.98  9.12  9.48   9.51  9.58 B Gypsum + Control (5: 5) Freshwater pH 7.01  9.28  9.46  9.57 10.05 10.37 10.62 10.93 Seawater pH 7.98  8.72  8.83  8.85  9.12  9.29   9.53  9.58 C Gypsum + Control (6: 4) Freshwater pH 7.01  9.19  9.33  9.41  9.59 10.17 10.48 10.78 Seawater pH 7.98 8.72  8.73  8.88  9.00  9.05  9.43  9.54 D Gypsum + Control (7: 3) Freshwater pH 7.01  8.95  9.02  9.16  9.33  9.47 10.29 10.64 Seawater pH 7.98  8.61  8.71  8.80  8.91  9.02  9.34  9.48 Control: Mixing ratio (7: 3) Dolomite + Clam flour Freshwater pH 7.01 10.24 10.35 10.48 10.68 10.83 11.13 11.28 Seawater pH 7.98 9.0 9.22  9.32  9.43  9.47  9.55  9.58

As shown in Table 2, the pH of the experimental water was pH 7.01 for fresh water (groundwater) and pH 7.98 for seawater. 0.4-3.0 g of dolomite (CaMg [CO3] 2) and clam flour were mixed in the experimental water at 7: 3. In the case of the concentration of / L, pH in fresh water (ground water) is 10.24 ~ 11.28, pH 9.0 ~ 9.58 in sea water, and both fresh and sea water are strongly alkaline.

In addition, the control group (mixture of Dolomite and clam 7: 3) and the B group of Table 2 mixed with 50% by weight of gypsum showed pH 9.28 ~ 10.93 in fresh water and pH 8.72 ~ 9.58 in sea water. 70% by weight of D spheres is pH 8.95-10.64 in fresh water and pH 8.61 ~ 9.48 in seawater, and is strongly alkaline.

However, the result of strong alkalinity of calcium component is good for correcting acidification of farmland and subsea soil, but it has the disadvantage of hardening soil. To solve this problem, dolomite (CaMg [) containing magnesium oxide (MgO) and calcium (Ca) Experiment by adjusting the mixing ratio of CO3] 2).

In other words, in order to effectively perform soil acidity correction but not to harden the soil, magnesium (Mg) contained in dolomite (CaMg [CO3] 2) should be mixed in an amount of 10.0 wt% or more in terms of magnesium oxide (MgO) to effectively cure calcium. By preventing it,

In the end, 40-50% by weight of gypsum and 35-42% by weight of Dolomite in Tables A and B of Table 2 containing at least 30% by weight of dolomite (30% by weight of dolomite contained 10.4% by weight of magnesium oxide (MgO)). (12.1 ~ 14.6 wt% in terms of magnesium oxide (MgO)) and 15-18 wt% of clam flour mixed with calcium fertilizer, so that the progress of acidification to farmland or sea soil including flower soil and forest soil You can fertilize the acidity by fertilizing in less severe places.

If the dolomite is to prevent the hardening of the soil, shellfish serves to supply minerals of micronutrients while maintaining the alkalinity of the soil for a long time.

In addition, as shown in Table 1, the weakly alkaline and weakly acidic compounds are mixed with the weakly acidic dolomite and clam powder with the weakly acidic fertilizer by-product gypsum. Strong alkalizing the material of can be confirmed by the experiment 1.

This suggests that consumption of gypsum, a fertilizer by-product, can be maximized while using weakly alkaline dolomite and shellfish that do not harden the soil.

Experiment 2. Calcium compound fertilizer mixed with "gypsum" and "quick lime" + "dolomite" + "shellfish" (2: 6: 2)

PH change according to the mixing amount of "gypsum" and "quick lime" + "dolomite" + "shellfish" (2: 6: 2) Mixing amount (g / L) PH of experimental water 0.3 0.4 0.5 1.0 2.0 3.0  A plaster 4: control 6 Freshwater pH 7.01 10.41 10.53 10.59 11.06 11.32 11.47 Seawater pH 7.84  9.37  9.46  9.54  9.69  9.69  9.73  B plaster 5: control 5 Freshwater pH 7.01  9.51  9.91 10.42 10.96 11.30 11.46 Seawater pH 7.84  9.30  9.35  9.51  9.60  9.65  9.69  C plaster 6: control 4 Freshwater pH 7.01  9.49  9.72 10.18 10.76 11.10 11.29 Seawater pH 7.84  9.26  9.28  9.41  9.52  9,59  9.62 Control: Mixing ratio (2: 6: 2) Quicklime + Dolomite + Shellfish Freshwater pH 7.01 11.3 11.6 11.8 12.0 12.2 12.2 Seawater pH 7.84  9.9 10.0 10.1 10.2 10.3 10.3

As shown in Table 3, the pH of the experimental water was pH 7.01 for fresh water (groundwater) and pH 7.84 for seawater. The water was added with quicklime (CaO), dolomite (CaMg [CO3] 2), and shellfish 2: 6: 2. If the mixture is mixed with 0.3 ~ 3.0g / L, the pH in fresh water (ground water) is 11.3 ~ 12.2 and pH 9.9 ~ 10.3 in sea water. Both fresh and sea water are strongly alkaline. In particular, the concentration of 1 g / L (0.1%, 1.0 ton / kPa), the experimental value of pH 12.0 in fresh water, pH 10.2 in sea water.

In addition, at 1 g / L of A, B and C bulbs mixed with these controls (quick lime, dolomite and shellfish at 2: 6: 2) and gypsum 40-60%, pH 10.76-11.06 in fresh water, seawater At pH 9.52 ~ 9.69, both fresh and seawater showed strong alkalinity.

The mixing amount of the constituents used in Experiment 2 was 40 to 60% by weight of gypsum, 8 to 12% by weight of quicklime, 24 to 36% by weight of dolomite and 8 to 12% by weight of clam flour. It is contained.

The alkaline nature of calcium contained in the constituent material is good for correcting the acidification of farmland or subsea soil, but has the disadvantage of hardening the soil. To prevent and improve this, dolomite, which is mainly composed of magnesium oxide (MgO) and calcium (Ca), Experiments were performed by adjusting the mixing ratio of CaMg [CO3] 2).

That is, in order to effectively perform soil acidity correction but not to harden the soil, magnesium (Mg) contained in dolomite must be mixed in an amount of 10% by weight or more in terms of magnesium oxide (MgO), which effectively prevents the hardening of calcium.

Eventually, 40-50% by weight of Gypsum A and B in Table 3 containing at least 30% by weight of dolomite, 10-12% by weight of quicklime, 30-36% by weight of dolomite (10.4-12.5% by weight of magnesium oxide (MgO)). ) And calcium powder fertilizer mixed with 10-12% by weight of clam flour can be used to correct acidity by fertilizing it to farmland or subsea soil including flower soil and forest soil.

Experiment 2 was carried out by adding more quicklime to the mixture of Dolomite, clam powder and gypsum, which were mixtures of Experiment 1, and the addition of quicklime was intended to take advantage of the strong alkaline properties of quicklime to correct strongly acidic soils. will be.

As described above, in order to correct acidification of farmland and sea soil, quicklime (CaO), dolomite (CaMg [CO3] 2), clam flour (mineral powder fertilizer), and gypsum (CaSO4), which contain calcium (Ca) in common As a result of mixing in a certain ratio, strong alkaline quicklime, weakly alkaline dolomite and shellfish powder and weakly acidic gypsum were mixed and calcium, which is a common component of the substance, was synergistic, and weakly alkaline (dolomaite, shellfish) and weakly acidic acid. Strong alkalinization of gypsum makes it possible to efficiently improve acidified soil and to recycle gypsum, a by-product of fertilizer.

Claims (2)

40-50% by weight of fertilizer by-product gypsum (CaSO4) and 35-42% by weight of dolomite (CaMg (CO3) 2) (12.1-14.6 wt% in terms of magnesium oxide (MgO)) and shells pulverized to below 2 mm particle size A calcium compound fertilizer, characterized in that the acidity of the soil contaminated with acidic soils and sea soils can be corrected by mixing 15 to 18% by weight of powder (pasparized fertilizer). 40-50% by weight of fertilizer by-product gypsum (CaSO4), 10-12% by weight of quicklime (CaO), 30-36% by weight of dolomite (CaMg (CO3) 2) (10.4-12.5% by weight of magnesium oxide (MgO)) And 10-12% by weight of pulverized shellfish (pulverite powder fertilizer) pulverized to a particle size of 2 mm or less, so that the acidity of strongly acid-contaminated soil and subsea soil can be corrected.