共查询到19条相似文献,搜索用时 46 毫秒
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评述了世界饲料磷酸盐产品的品种,包括磷酸氢钙、磷酸二氢钙、脱氟磷酸钙等,市场需求量变化情况,主要生产工艺的比较,生产能力与产量变化及现状等。介绍了影响饲料磷酸盐市场需求变化的因素并对饲料磷酸盐所面对的生物技术、生物效价、生产环保等问题进行分析,预测了饲料磷酸盐的发展方向。 相似文献
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叙述目前我国饲料级磷酸氢钙生产的主要工艺方法,指出存在的问题,对今后饲料磷酸盐工业的发展提出若干建议,并推荐一项生产饲料磷酸盐的新工艺。 相似文献
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饲料磷酸盐生产的回顾与展望 总被引:4,自引:2,他引:2
回顾国内外饲料磷酸盐生产的发展过程。发达国家在二战前开始起步,进行生产研究和应研究;生产发展最为迅速的时期是60年代初至70年代中期。国内从60年代已开始研究生产,而真正开始生产和使用却在80年代末期,直至90年代中期才达到较为迅速的生产发展时期。列出了国内不同时期饲料磷酸盐的产品标准,讨论了现有生产情况下存在的问题;展望了未来的发展方向。 相似文献
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饲料脱氟磷酸三钙的生产应用和发展前景 总被引:2,自引:0,他引:2
饲料脱氟磷酸三钙的生产应用和发展前景蔡孝载,陆坤荣(化工部化肥技术开发中心)1前言饲料磷酸盐的消费水平是衡量一个国家农业和畜牧业发展水平的重要标志之一。饲料磷酸盐产品通常有磷酸钙盐、磷酸钠盐、磷酸铵盐和尿素磷酸盐等几个系列,其中以磷酸钙盐应用得最为广... 相似文献
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一、发展磷酸三钙饲料添加剂磷酸三钙是饲料磷酸盐的主要品种之一,世界各国对饲料磷酸盐的消费水平已成为衡量一个国家农业、畜牧业发展的重要标志。我国饲料工业的迅速发展促进了饲料磷酸盐的生产,目前已有饲料企业一万多家。1988年混配饲料产量已达3000万吨,其中配合饲料量已达1800万吨,需要磷酸盐加工30万吨左右,而目前国内饲料磷酸盐产量不足5万吨,远不能满足需要。饲料产品不仅要保证蛋白质、脂肪和碳水化 相似文献
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中国开始使用无机磷酸钙盐作为动物饲料中磷钙的补充剂,磷酸饲钙标准不同时期的制订修订适应了生产技术的发展和市场的需求,对促进磷酸盐工业的发展起到了积极作用。论述了磷酸饲钙微利时代的到来和磷矿资源的贫化带来了工艺技术与标准的不适应;饲料磷酸盐标准的制订和修订应着眼于磷酸盐行业长远的发展,在饲料安全的前提下,充分考虑资源状况和生产工艺的适应性及标准的经济性。 相似文献
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在新颁布施行的循环经济促进法的新形势下,饲料磷酸盐与湿法磷酸盐生产技术,不仅要满足市场的需要,更要符合循环经济促进法的要求。本文讨论分析饲料磷酸盐(含湿法磷酸盐)传统生产工艺技术中资源利用率和废副产品处置所面临的减量、循环、再利用的问题与挑战,同时提出在新的法律生态环境要求下磷酸盐生产进行技术创新的机遇与方法。 相似文献
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我国饲料磷酸盐的发展始于60年代,但当时发展较慢,而且产品也只有磷酸氢钙一种。进入80年代,随着中国饲料工业的飞速发展,当时为动物补充钙磷的骨粉已经不能满足配合饲料增长的要求,磷酸氢钙的供需矛盾表现突出。从1991年到1996年,饲料磷酸盐生产企业如雨后春笋般发展,相继建成投产60余家,到1996年磷酸氢钙生产能力达53万t,优质产品供不应求。在随后的3年时间里, 相似文献
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Controlled-release phosphate fertilizers include phosphate rocks (PRs) for direct application, partially acidulated phosphate
rocks (PAPRs) and thermal phosphates. Phosphate rocks contain apatite as the main P containing mineral, the composition and
the chemical nature of which vary between PRs. Based on the solubility in chemical extractants PRs are broadly grouped into
‘reactive’ and ‘unreactive’. The ‘reactivity’ of PRs is influenced strongly by the extent of carbonate substitution for phosphate
in the apatite minerals. Under certain soil and climatic conditions reactive PRs (RPRs) can be used as a source of P for direct
application.
Partially acidulated phosphate rocks (PAPRs) are produced either by direct partial acidulation of PRs with mineral acids or
by mixing PRs with fully acidulated superphosphate reaction mixtures. Partial acidulation of PRs with H3PO4 generally results in higher water soluble P contents than those acidulated with H2SO4. Mixing of RPRs with superphosphate reaction mixtures sometimes results in the preferential consumption of free acid and
thereby increases the amounts of residual unreacted PRs.
Thermal phosphates are produced by either heating PRs below melting point both in the presence and the absence of silica (calcined
phosphates) or heating PRs with silica above melting point (fused phosphate). These phosphates are alkaline in nature and
hence suitable for acidic soils. 相似文献
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J. Hagin S. S. S. Rajan M. K. Boyes M. Upsdell 《Nutrient Cycling in Agroecosystems》1990,22(2):109-117
Five phosphate rocks varying in formic acid P solubility from 18.9 to 52.7%, expressed as percentage of total P, were acidulated with phosphoric or sulphuric acids to 0, 20%, 33% and 50% of full acidulation and granulated. In an incubation experiment fertilizer granules of diameter 1–2 mm were mixed with two acid soils and after 1 week incubation soil samples were extracted with a 0.5 M NaOH solution. In a dissipation experiment single fertilizer granules of 4 mm diameter were implanted into soil, incubated for 1 and 4 weeks and inorganic P fractionation in the residual granules and the surrounding soil was performed. Dissipated P was greater than the water soluble P content of the partly acidulated phosphate rock fertilizers indicating the dissolution of the non-acidulated phosphate rocks. The amount of P dissipated was related to the initial water soluble P content and to the formic acid solubility of phosphate rocks used for manufacturing the fertilizers. The P dissipated increased with an increase in soil acidity. 相似文献
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Water insoluble residues (WIR) of unreactive phosphate rocks in single superphosphate-reactive phosphate rock (SSP-RPR) mixtures are considered to reduce the agronomic value of these mixtures. A technique using concentration ratios of elements to identify the quantities of WIR of ground North Carolina (NC), ground Nauru and as received NC phosphate rocks in a SSP-RPR was developed. Of 22 elements tested P/Sr ratios were found to be the only element ratios that could be used to distinguish between WIR's derived from Nauru and NC. P/Sr ratios in Nauru and NC were markedly different and provided a useful index for differentiating between the two rocks. During acidulation the P/Sr concentration ratio remained essentially constant in the WIR's from both rocks.Using the element ratio technique the percentage of total P in the SSP-RPR sample was determined to be 60-61% water soluble, 5% water insoluble Nauru, 2% water insoluble ground NC and 32-33% water insoluble as received NC.The element ratio technique developed in this study can be applied to partially acidulated P fertilizers made with rocks other than NC and Nauru provided elements which satisfy the same conditions as Sr in this study can be found. 相似文献
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针对磷化渣产生的机理及危害,分析了磷化液中磷化渣的沉降特性,并在此基础上,结合本公司涂装车间,提出了一种新的除磷化渣装置系统及其管理技术。 相似文献
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国际磷矿工业发展趋势 总被引:2,自引:0,他引:2
本文从磷矿资源、磷矿生产、磷矿石的进出口以及世界磷矿石和磷肥的贸易角度,阐明目前磷矿工业的矿肥结合发展方向,提出中国的对策应是限制并停止磷矿石的出口,就地发展自己的磷肥工业,以减少高价的高浓度磷复肥的进口。 相似文献