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Method used for producing multi-functional solid conditioning agent from weathered phosphoric ore

A soil conditioner and multi-functional technology, applied in the field of fertilizer and soil conditioner preparation, can solve problems such as food security and groundwater environmental threats, reduce cultivated land quality, and increase soil heavy metal activity

Inactive Publication Date: 2018-01-05
山东清大科技工程有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acidification not only reduces the quality of cultivated land, but also increases the activity of heavy metals in soil, posing a threat to food security and groundwater environment

Method used

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  • Method used for producing multi-functional solid conditioning agent from weathered phosphoric ore
  • Method used for producing multi-functional solid conditioning agent from weathered phosphoric ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] First, use impact mill to crush weathered phosphate rock and zeolite to 60 mesh, then mix the two according to the ratio of 9:1, use ball mill to microcrystallize and activate to 1200 mesh, and then mix and ferment with 3 times the amount of cow dung (calculated on dry basis) After 20 days, mix with 5 parts of dolomite, 3 parts of limestone, 1 part of shell powder and 1 part of steel slag powder evenly in a ratio of 1:3, and use a granulator to granulate (average 2.5m) to obtain the product, namely The multifunctional soil conditioner produced by the invention. The acidic red soil in Xinfeng County, Jiangxi Province was improved. The test site is located in the test base of Shandong Binzhou Qingda Science and Technology Co., Ltd.

[0025] The soil was air-dried naturally, passed through a 2mm sieve, and placed in pots, with 2.5kg of soil in each pot. Taking the soil conditioner produced by the present invention as a contrast (CK); applying 12.5 g of the soil condition...

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Abstract

The invention provides a method used for producing multi-functional solid conditioning agent from weathered phosphoric ore. According to the method, weathered phosphoric ore, dolomite, shell powder, limestone, zeolite, and steel slag are taken as raw materials, mechanical force activating is adopted for microcrystalline physical modification of ore components to improve mineral surface activity, and combination of fermented organic raw materials is adopted so as to prepare a natural high-activity multi-functional solid conditioning agent. The natural high-activity multi-functional solid conditioning agent is capable of adjusting soil pH value, realizing passivation of heavy metal in soil, and supplying soli with nutrients. The method is short in technology process flow; no environment pollution is caused; investment is low; and effect is achieved quickly. The method is capable of realizing high efficiency utilization of weathered phosphoric ore.

Description

technical field [0001] The invention belongs to the technical field of preparation of fertilizers and soil conditioners, and relates to a process for preparing soil conditioners by using weathered phosphate rocks, in particular, using weathered phosphate rocks as raw materials to produce soil conditioners under the condition of adding an activator and using purely physical processing technology It is a new process method of chemical agent, which has the effect of adjusting soil acidity and alkalinity and passivating heavy metals in soil. Background technique [0002] my country's phosphate rock resources are mainly distributed in the five provinces of Yunnan, Guizhou, Sichuan, Hunan and Hubei, and weathering of phosphate rock is common in Southwest China. According to estimates from 105 mining areas, my country's weathered phosphate rock resources are 1.49 billion tons, and the potential resources are 4.077 billion tons. Weathered phosphate rock contains more slime, which is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C05G3/04C09K109/00C05G3/80
Inventor 何振全盖东海杨玉芬杜玉凤张仙梅刘耘彤姜涛
Owner 山东清大科技工程有限责任公司
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