Pelletizing binder with starch and humus acid and production thereof

A technology of humate and adhesive, applied in the field of pellet adhesive and its preparation, can solve the problems of poor high temperature resistance, pellet damage, easy loss of viscosity, etc., achieve no environmental pollution and reduce harmful impurities , cheap effect

Inactive Publication Date: 2008-01-09
淄博宜龙实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Some people try to use organic binders such as hydroxymethyl cellulose and polyvinyl alcohol to produce pellets, but their high temperature resistance is poor, and they are easy to lose viscosity during the roasting process of the pellets, resulting in damage to the pellets, which is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 Preparation of crosslinked starch acetate-sodium humate pellet binder

[0037] The steps are divided into:

[0038] (1) Self-made starch acetate solution

[0039] Weight ratio: starch: acetylating agent = 1.4: 0.08

[0040] The starch adopts local industrial standard corn starch, quality specifications: moisture (%) ≤ 14, acidity (t) ≤ 20, protein (%) ≤ 0.5, fineness (100 mesh, %): ≥ 99.5;

[0041] The acetylating agent adopts local commercially available industrial standard acetic anhydride (trade name acetic anhydride), quality specification: content ≥ 99%;

[0042] Disperse 140kg of starch (dry basis) in 100L of normal water to prepare starch milk; add 3% NaOH solution dropwise while stirring at 25°C, adjust the pH to 8.0-8.5, slowly drop in 8kg of acetic anhydride, and drop in alkali at the same time The pH of the solution was maintained at 8.0 to 8.5. After adding acetic anhydride, the reaction was maintained for 1 hour, and then adjusted to pH 6 to...

Embodiment 2

[0056] Example 2 Preparation of cross-linked starch acetate-potassium humate pellet binder

[0057] (1) Self-made starch acetate solution Weight ratio: starch: acetylating agent = 1: 0.06

[0058] The starch adopts local industrial standard sweet potato starch; quality specifications: moisture (%) ≤ 15, acidity (t) ≤ 25, protein (%) ≤ 0.5, fineness (100 mesh, %): ≥ 99.5;

[0059] The acetylating agent adopts local commercially available industrial standard vinyl acetate copolymer (Vinyl acetate copolymer), quality specification: content ≥ 99%; starch dosage is 100kg, vinyl acetate dosage is 6kg, dispersed in 102.76.L of normal water to obtain starch acetate solution 200kg, the degree of substitution is 0.08%;

[0060] This batch of starch acetate yield: 200 / 208.76 * 100%=95.8%, standby; All the other are the same as embodiment 1.

[0061] (2) Self-made potassium humate solution

[0062] Weight ratio: low calorific value coal: alkali = 0.8: 0.2

[0063] The low calorific va...

Embodiment 3

[0072] Example 3 Preparation of cross-linked starch acetate-magnesium humate pellet binder

[0073] (1) Self-made starch acetate solution Weight ratio: starch: acetylating agent = 1: 0.06

[0074] The starch adopts local industrial standard potato starch; white or light yellow shadow powder, quality specifications: moisture (%)≤18, acidity (t)≤14, protein (%)≤0.15, fineness (100 mesh, %): ≥99.5; (GB / 8884-88)

[0075] The acetylating agent is glacial acetic acid with industrial specification locally produced and commercially available, quality specification: content ≥ 99.5%; the rest is the same as in Example 1.

[0076] (2) Homemade magnesium humate solution

[0077] Weight ratio: low calorific value coal: alkali = 0.8: 0.2

[0078] The low calorific value coal uses local peat, and its humic acid content is ≥ 50%, and the ash content is ≤ 20%; the alkali uses solid magnesium hydroxide, and the content is 94%;

[0079] (3) prepare adhesive of the present invention

[0080]...

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Abstract

An adhesive is made from the starch and the humate. The outlook is grayish brown to black brown; the dry based material is not less than 90%; 80-150eyes of the grain size is not less than 95%; the expansion hold is not less than 20-50ml / g; The pH of the 1% water solution is 7-11; the content of the water is less than 10%; amyloacetate: humate: the cross linker is 100-120:90-100:0.02-0.04. the weight ratio of the starch and the acetylating agent is 1-1.4:0.06-0.08 to make the amyloacetate solution; the lower calorific power coal: alkali is 0.8-1.1:0.2-0.4 to make humate solution; amyloacetate: humate: the cross linker is 100-120:90-100:0.02-0.04 to make the adhesive. The additive amount is 4 permillage, so it is used for ferrum-smelting to save the cost.

Description

technical field [0001] The invention belongs to the technical field of pretreatment of metallurgical raw materials, and in particular relates to a pellet binder made from starch and humate and a preparation method thereof. Background technique [0002] In the metallurgical industry, the mined ore is crushed, and the concentrate powder with high metal content is obtained through gravity separation, flotation, magnetic separation and other methods; the "fine" iron concentrate powder is mixed with binder and water, Mix evenly in the pelletizing machine to make "green pellets", and obtain pellets after high-temperature sintering before smelting operations. [0003] The pellet binder used in the traditional ironmaking process is mainly bentonite. . Because of its strong hygroscopicity, large swelling coefficient, high dispersion, large specific surface area, plasticity and cohesiveness. It can significantly improve the strength and bursting temperature of green pellets, expand...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/244
Inventor 王宜亮张娟李生智
Owner 淄博宜龙实业有限公司
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