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Method for preparing sintered bricks from pressure filtration residues

A technology for filter press residue and sintered bricks, which is applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as the ineffective utilization of filter press residues, eliminate secondary pollution, enhance strength, and reduce production. cost effect

Active Publication Date: 2014-05-14
毛耀辉 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies in the prior art, to provide an industrialized method for preparing sintered bricks with filter press residue, and fundamentally solve the problem that the filter press residue produced during the production of electrolytic manganese, manganese dioxide and manganese sulfate cannot be effectively utilized. question

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  • Method for preparing sintered bricks from pressure filtration residues
  • Method for preparing sintered bricks from pressure filtration residues
  • Method for preparing sintered bricks from pressure filtration residues

Examples

Experimental program
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Effect test

Embodiment 1

[0022] During the electrolysis of manganese dioxide, manganese carbonate ore is used for leaching and liquid preparation, and the press filter residue produced by crushing and water is directly transported to the soaking and mixing tank according to the solid-liquid ratio of 1:2. Crush the bauxite tailings and coal gangue to 60 mesh respectively, mix evenly according to the ratio of bauxite tailings and coal gangue = 75:25, and set aside. Press the filter residue into the immersion mixing tank: barium carbonate=100:0.5, add barium carbonate, stir and soak for 24 hours. Use 15% ammonium bicarbonate aqueous solution to adjust the pH value to 8, stir for 1 hour, pump into a filter press for solid-liquid separation, and set aside the solid residue. (The liquid is transported to the evaporation concentrator to control the distillate volume ratio; mixed concentrated liquid: distilled water = 2:8. The water returns to soak the press filter residue, and the concentrated liquid contain...

Embodiment 2

[0027] When manganese metal is electrolyzed, manganese oxide ore is used for leaching and liquid preparation, and the press filter residue produced by crushing and water is directly transported to the soaking and mixing tank according to the solid-liquid ratio of 1:2. Crush the bauxite tailings and coal to 60 mesh respectively, mix them evenly according to the ratio of bauxite tailings: coal = 85:15, and set aside. Add barium carbonate to the immersion and mixing tank by pressing filter residue in proportion: barium carbonate = 100:1, stir and soak for 24 hours. Use 15% ammonium bicarbonate aqueous solution to adjust the pH value to 8, stir for 1 hour and pump into a filter press for solid-liquid separation, and the solid residue is set aside. (The liquid is transported to the evaporation concentrator to control the distillate volume ratio; mixed concentrated liquid: distilled water = 2:8. The water returns to soak the press filter residue, and the concentrated liquid containi...

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Abstract

The invention discloses a method for preparing sintered bricks from pressure filtration residues. The method comprises the following steps of crushing the pressure filtration residues, mixing the crushed pressure filtration residues and barium carbonate, adding water for impregnation and stirring, regulating the pH value by using a ammonium bicarbonate aqueous solution, performing solid-liquid separation, crushing bauxite tailings, gangue or coal respectively, uniformly mixing the crushed bauxite tailings, gangue or coal and solid residues according to a ratio, placing the mixture in a closed environment for balancing, performing extrusion forming on the balanced mixture, feeding the mixture into a roasting kiln, and controlling the roasting temperature to obtain required pressure filtration residue sintered bricks. According to the method, the problems of multiple lime blowing phenomena, severe scumming, poor weather resistance and the like of bricks are radically solved; the using amounts of the pressure filtration residues and the bauxite tailings in the pressed sintered bricks are more than 80 percent and more than 15 percent respectively, and the addition of cement and the like is avoided, so that the pressure filtration residues are fully utilized; process waste gas and wastewater in a production process are recycled, so that the production cost is further lowered, and the environment is protected; the method is simple and low in cost, and has broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of sintered brick preparation, and in particular relates to a method for producing sintered bricks by utilizing manganese ore and manganese smelting solid slag to produce metallic manganese, manganese dioxide and manganese sulfate. Background technique [0002] The production of electrolytic manganese, manganese dioxide and manganese sulfate will produce a large amount of filter press residue. The traditional treatment method is to build a slag bank for stacking, which not only brings hidden dangers to environmental protection and safety, but also causes a waste of resources. Recently, many scientific research units have conducted a lot of research on the reuse of filter press residue, among which the use of filter press residue to process building bricks is an important direction, but the effect is not ideal. The specific performance is as follows: 1. The consumption of the filter only accounts for 30~60%,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00C04B18/30
CPCY02W30/91
Inventor 毛耀辉鲁燕杰
Owner 毛耀辉
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