Method for producing multiplex siliceous fertilizer from molybdenum mine tailings

A molybdenum tailings and multi-element technology is applied in the field of using molybdenum tailings to produce multi-element silicon fertilizers, which can solve the problems of high processing cost of molybdenum tailings and pollute the environment, and achieve sustainable development, promotion of calcination, and easy weathering and decomposition. Effect

Inactive Publication Date: 2007-10-10
锦州沈宏集团股份有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high processing cost and environmental pollution of existing molybdenum tailings, provide a method f

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1.1. Inspect and calculate the total equivalents of acidic oxides and basic oxides in molybdenum tailings, dolomite and anthracite according to cement production standards and chemical fertilizer production standards. Aluminum and iron are included in acidic oxides, <0.01M The trace elements are not counted;

[0027] 1.2. Check the calorific value of the selected anthracite, and calculate the coal blending amount required for the kiln temperature ≥ 1200 ℃ according to the shaft kiln cement heat distribution method;

[0028] 1.3. According to the test results, the amount of molybdenum tailings and dolomite is calculated according to acid oxide / basic oxide ≈1.2, and mixed with coal to obtain the principle formula of raw meal;

[0029] 1.4. Add industrial waste alkali as a calcination aid to the above ingredients, and alkali metal ions account for 0.2% of the total amount of the above ingredients to catalyze the reaction speed, reduce the calcination temperature, and incre...

Embodiment 2

[0034] 2.1. Inspect and calculate the total equivalents of acidic oxides and basic oxides in molybdenum tailings, high-magnesium limestone and white coal according to cement production standards and chemical fertilizer production standards, wherein aluminum and iron are included in acidic oxides, Trace elements <0.01M are not counted;

[0035] 2.2. Check the calorific value of the selected white coal, and calculate the coal blending amount required for the kiln temperature ≥ 1200 °C according to the shaft kiln cement heat blending method;

[0036] 2.3. According to the test results, calculate the amount of molybdenum tailings and high-magnesium limestone according to acid oxide / basic oxide ≈1.2, and mix with coal to obtain the raw meal principle formula;

[0037] 2.4. Add a strong basic organic compound in the water as a calcining aid. The alkali metal ions account for 1% of the total amount of the above ingredients. The strong basic organic compound is phenol chemical waste r...

Embodiment 3

[0042] 3.1. Inspect and calculate the total equivalents of acidic oxides and basic oxides in molybdenum tailings and dolomite according to cement production standards and chemical fertilizer production standards. Among them, aluminum and iron are included in acidic oxides, and <0.01M Trace elements are not counted;

[0043] 3.2. According to the inspection results, calculate the dosage of molybdenum tailings and dolomite according to acid oxide / basic oxide ≈1.1, and obtain the principle formula of raw meal;

[0044] 3.3. Add natural alkaline earth as a calcination aid to the above ingredients, and alkali metal ions account for 0.5% of the total amount of the above ingredients;

[0045] 3.4. Grind the above-mentioned ingredients into fine powder with a particle size of 80 mesh or more, then add it into a rotary kiln for calcination, and calcine it at a temperature of 1200°C for 30 minutes to calcine it into silicon fertilizer clinker;

[0046]3.5. After the calcined silicon fe...

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Abstract

This invention discloses a method for producing multi-element silicon fertilizer from molybdenum tailing and dolomite or high-magnesium limestone. The method comprises: calculating the equivalents of acidic oxides and alkaline oxides in molybdenum tailing, dolomite or high-magnesium limestone, and anthracite or white coal, calculating the coal amount for greater than or equal to 1200 deg.C kiln temperature, calculating the amounts of molybdenum tailing and dolomite or high-magnesium limestone at an acidic oxides/alkaline oxides weight ratio of 1:2, mixing with coal, adding calcination additive containing 0.2-1% alkali metal ions, grinding to higher than 80 mesh fine powder, adding into a shaft kiln, calcining at 1200-1350 deg.C to obtain silicon fertilizer clinker, or adding into a pelletizer, adding water, palletizing, calcining at 1200 deg.C or higher to obtain silicon fertilizer clinker, quenching and pulverizing to obtain multi-element silicon fertilizer.

Description

technical field [0001] The invention belongs to a comprehensive treatment method for molybdenum tailings, in particular to a method for producing multi-element silicon fertilizer from molybdenum tailings. Background technique [0002] Molybdenum tailings account for more than 99% of the raw ore and are the main source of pollution in mines. At present, the goal of molybdenum tailings treatment technology is harmless. The basic method is to build dams and reservoirs, that is, to build dams on useless ravines or abandoned land, and build a tailings reservoir for molybdenum tailings. After the warehouse is full, the warehouse will be closed and the vegetation will be restored. The problem with this molybdenum tailings treatment method is that the construction cost of the tailings pond is high, and the maintenance also requires a lot of manpower and material resources. A medium-sized mine needs to invest millions of dollars every year. Moreover, the problem of groundwater poll...

Claims

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Application Information

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IPC IPC(8): C05G1/00C05D9/00C05D9/02C04B2/12C04B7/14
CPCY02P40/10
Inventor 董坚刘元宝
Owner 锦州沈宏集团股份有限公司
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