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Method for producing soil conditioner by using bulk industrial solid waste and product

A soil conditioner and industrial solid waste technology, which is applied in the field of agricultural resource utilization of bulk industrial solid waste, can solve the problems of low production cost, high calcination temperature, soil compaction, etc., and achieve low cost, wide sources, comprehensive nutrients and balanced effect

Active Publication Date: 2021-09-03
SOUTH CHINA UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method has the advantages of low production cost, and can decompose the silicon in the potassium feldspar and the calcium in the limestone together, and turn it into a soil conditioner of weakly alkaline potassium, silicon, calcium and other large and medium elemental minerals, which is beneficial to comprehensive utilization Various mineral nutrients in rocks, the products have a good market prospect, and the improvement effect on acidic soil in the south is very obvious; but there are also high calcination temperatures. The calcination temperature of this method is generally above 1200 ° C, and the water solubility of the products On the low side, with hydraulic hardness, there are problems such as adding water and agglomerating to cause soil compaction

Method used

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  • Method for producing soil conditioner by using bulk industrial solid waste and product

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Effect test

Embodiment 1

[0050]A soda-making enterprise in Shandong produced a large amount of white mud (soda slag) produced by the ammonia-soda process, and there were also a large amount of flue gas desulfurization gypsum and phosphogypsum nearby. Potassium ore is mined from Yantai, Shandong, which contains 13.98% potassium oxide, 65.32% silicon dioxide, 18.01% aluminum oxide, and 2.69% sodium oxide, iron oxide, etc. The total content of various oxides is about 100%. Mix alkali-making white mud: desulfurization gypsum: phosphogypsum: potassium ore at a mass ratio of 28.89:8.59:10.95:51.57. These raw and auxiliary materials are required to contain heavy metal elements that meet the national standards for silicon calcium potassium magnesium fertilizers (GB / T36207- 2018), the ecological indicators of arsenic, cadmium, lead, chromium, and mercury, the contents (unit: mg / kg) are ≤50, ≤10, ≤200, ≤500, ≤5, and the particle size is ≥200 mesh (≤0.074mm). On this basis, add potassium chloride 2.5% + sodium s...

Embodiment 2

[0053] A large-scale soda production enterprise in Qinghai produced a large amount of white mud (alkali slag) produced by the ammonia-soda process, and the flue gas desulfurization facilities of the factory also produced a large amount of desulfurization gypsum, and a large amount of phosphogypsum was accumulated in the surrounding phosphate fertilizer enterprises. Potassium ore is collected from Golmud, Qinghai, which contains 9.56% potassium oxide, 68.46% silicon dioxide, 15.67% aluminum oxide, and 6.31% sodium oxide, iron oxide, etc. The total content of various oxides is about 100%. Mix the two materials of soda-making white mud: desulfurization gypsum: phosphogypsum: potassium ore at a mass ratio of 27.47:7.52:20.65:44.36. These raw and auxiliary materials are required to contain heavy metal elements that meet the national standards for silicon, calcium, potassium and magnesium fertilizers (GB / T36207-2018) ecological indicators of arsenic, cadmium, lead, chromium, mercury...

Embodiment 3

[0056] A large chemical enterprise in Hebei Province produced a large amount of white mud (alkali slag) produced by the ammonia-soda method. The factory adopted the limestone-gypsum method to implement wet flue gas desulfurization, and produced a large amount of desulfurized gypsum. There is also a compound fertilizer processing enterprise nearby. There is a large amount of phosphogypsum that is produced during the production of phosphoric acid. Potassium ore is mined from Tangshan, Hebei, which contains potassium oxide 9.28%, silicon dioxide 64.23%, aluminum oxide 13.58%, and other oxides such as sodium oxide, ferric oxide, titanium dioxide, manganese dioxide, and phosphorus pentoxide. The total content of the substance is about 12.91%. According to the mass ratio of soda-making white mud: desulfurization gypsum: phosphogypsum: potassium ore, the two materials are mixed according to the mass ratio of 25.89:34.59:12.95:26.57. These raw and auxiliary materials are required to c...

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Abstract

The invention discloses a method for producing a soil conditioner by using bulk industrial solid waste and a product. The method comprises the following steps: adopting alkali-making white mud, desulfurized gypsum, phosphogypsum, potassium ore, an additive and water; mixing, drying, roasting, cooling and crushing the materials to prepare an active mineral soil conditioner intermediate; and then adding potassium fulvate, zinc sulfate, ferric sulfate, sodium selenite and borax auxiliary materials, adding water, stirring the components together, and granulating, drying and packaging the mixture to obtain the mineral soil conditioner. The mineral soil conditioner produced by the invention has comprehensive and balanced mineral nutrients. The mineral substances contain various trace element components such as calcium, potassium, sodium, silicon, magnesium, sulfur, iron, selenium, zinc, boron, organic matters and the like, the nutrient varieties are complete, and the effect of nutrition balance can be achieved. The product has good effects and promotion functions on improvement of acid soil, prevention of soil hardening and supplementation of deficient soil minerals.

Description

technical field [0001] The invention belongs to the field of agricultural resource utilization of bulk industrial solid waste, and in particular relates to a method and product for producing soil conditioner by utilizing bulk industrial solid waste. Background technique [0002] Soda white mud (abbreviated as "soda white mud") is an industrial solid waste containing a large amount of water produced during the production of soda ash by the ammonia-soda method. With the development of my country's soda ash industry, the discharge of soda ash is increasing. The composition of soda white mud is roughly: CaCO 3 39.5~60.0%; CaSO 4 2.8~20.0%; CaCl 2 9.8~14.0%; NaCl 2.4~8.0%; CaO 3.0~8.3%; Mg(OH) 2 2.0~15.4%; SiO 2 2.5~9.1%;R 2 o 3 3.1~6.9%; acid insoluble matter 6.0~10.0%. The particles are fine, and the particle diameter of more than 65% (volume fraction) is less than or equal to 10 μm. The pH value of alkali slag is relatively high, generally up to 10.0-12.0, which...

Claims

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Application Information

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IPC IPC(8): C09K17/40C05G3/00C05G3/80C05G5/12
CPCC09K17/40C05G3/00C05G3/80C05G5/12C05D3/02C09K2101/00C05D9/00C05D9/02C05F11/02Y02A40/20
Inventor 石林蓝建锋
Owner SOUTH CHINA UNIV OF TECH
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